tag:blogger.com,1999:blog-75493244126450185052024-02-02T01:16:22.156-08:00DIY ProjectsПроизводство на всякакъв вид аудио техника.
Вижте някои от моите DIY проекти.Lyubenhttp://www.blogger.com/profile/02937647365236694158noreply@blogger.comBlogger37125tag:blogger.com,1999:blog-7549324412645018505.post-91789245255763949512015-02-04T01:20:00.001-08:002018-06-12T00:31:00.066-07:008 channel multiroom amplifier TDA2050 8x20W@4Ω<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgWLC_KVl7oymceekkqI0wpudna-Lh5BfG3GmQdVAl1rXnuPtoz0VmJrqAPtfVMQZKZQqWS5LD7wXzFV33Xm0Uy7FLw7YwfWoYI8pvHpsu0d_jWWH6OUTfsxGGcj3jS3Ef1PZG8G6EJlwE/s1600/0.jpg" imageanchor="1" style="clear: left; float: left; margin-bottom: 1em; margin-right: 1em;"><img border="0" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgWLC_KVl7oymceekkqI0wpudna-Lh5BfG3GmQdVAl1rXnuPtoz0VmJrqAPtfVMQZKZQqWS5LD7wXzFV33Xm0Uy7FLw7YwfWoYI8pvHpsu0d_jWWH6OUTfsxGGcj3jS3Ef1PZG8G6EJlwE/s1600/0.jpg" width="320" /></a>Осем канален усилвател, изграден на базана на интегрален чип <a href="http://www.st.com/content/ccc/resource/technical/document/datasheet/1d/71/14/1e/5d/cf/47/01/CD00000131.pdf/files/CD00000131.pdf/jcr:content/translations/en.CD00000131.pdf">TDA2050</a>. Всеки един от каналите е с незвисим вход / изход. Можете да захраните до 4 чифта стерео озвучителни тела, които да са в различни помещения. Именно това е предназначението на усилвателя, за фоново озвучаване на няколко на брой близки помешения, захранени от едно място. <br />
<a name='more'></a>Удобството e, че във всяка от тях може да звучи различен тип музика, без смущения в каналите.<br />
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Характеристики
/ Specifications<br />
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<table border="0" cellpadding="0" cellspacing="0" style="width: 506px;"><colgroup><col style="mso-width-alt: 11410; mso-width-source: userset; width: 234pt;" width="312"></col>
<col style="mso-width-alt: 7094; mso-width-source: userset; width: 146pt;" width="194"></col>
</colgroup><tbody>
<tr height="20" style="height: 15.0pt;">
<td class="xl65" height="20" style="height: 15.0pt; width: 234pt;" width="312">Input
sensitivity:</td>
<td class="xl65" style="width: 146pt;" width="194">1.00 Vpp</td>
</tr>
<tr height="20" style="height: 15.0pt;">
<td class="xl65" height="20" style="height: 15.0pt; width: 234pt;" width="312">Input
impedance:</td>
<td class="xl65" style="width: 146pt;" width="194">22 kΩ</td>
</tr>
<tr height="20" style="height: 15.0pt;">
<td class="xl65" height="20" style="height: 15.0pt; width: 234pt;" width="312">Voltage
gain:</td>
<td class="xl65" style="width: 146pt;" width="194"> +27 dB</td>
</tr>
<tr height="20" style="height: 15.0pt;">
<td class="xl65" height="20" style="height: 15.0pt; width: 234pt;" width="312">Peak
power output:</td>
<td class="xl65" style="width: 146pt;" width="194">160 W / 4 Ω, 80 W<span style="mso-spacerun: yes;"> </span>/ 8 Ω</td>
</tr>
<tr height="20" style="height: 15.0pt;">
<td class="xl65" height="20" style="height: 15.0pt; width: 234pt;" width="312">Peak
output voltage:</td>
<td class="xl65" style="width: 146pt;" width="194">14 VAC, ±20 Vpp</td>
</tr>
<tr height="20" style="height: 15.0pt;">
<td class="xl65" height="20" style="height: 15.0pt; width: 234pt;" width="312">Peak
output current:</td>
<td class="xl65" style="width: 146pt;" width="194">11A</td>
</tr>
<tr height="20" style="height: 15.0pt;">
<td class="xl65" height="20" style="height: 15.0pt; width: 234pt;" width="312">Quiescent
drain current, mA per channel</td>
<td class="xl65" style="width: 146pt;" width="194">50 mA</td>
</tr>
<tr height="20" style="height: 15.0pt;">
<td class="xl65" height="20" style="height: 15.0pt; width: 234pt;" width="312">Power
output 8 Ω, sine wave, RMS</td>
<td class="xl65" style="width: 146pt;" width="194">10 W</td>
</tr>
<tr height="20" style="height: 15.0pt;">
<td class="xl65" height="20" style="height: 15.0pt; width: 234pt;" width="312">Power
output 4 Ω, sine wave, RMS</td>
<td class="xl65" style="width: 146pt;" width="194">20 W</td>
</tr>
<tr height="20" style="height: 15.0pt;">
<td class="xl65" height="20" style="height: 15.0pt; width: 234pt;" width="312">Frequency
range: -3dB</td>
<td class="xl65" style="width: 146pt;" width="194">20 Hz - 80 kHz </td>
</tr>
<tr height="20" style="height: 15.0pt;">
<td class="xl65" height="20" style="height: 15.0pt; width: 234pt;" width="312">Full-power
bandwidth:</td>
<td class="xl65" style="width: 146pt;" width="194">20 Hz - 30 kHz</td>
</tr>
<tr height="20" style="height: 15.0pt;">
<td class="xl65" height="20" style="height: 15.0pt; width: 234pt;" width="312">Minimum
rated load:</td>
<td class="xl65" style="width: 146pt;" width="194">4 Ω</td>
</tr>
<tr height="20" style="height: 15.0pt;">
<td class="xl65" height="20" style="height: 15.0pt; width: 234pt;" width="312">Damping
factor:</td>
<td class="xl65" style="width: 146pt;" width="194">> 500</td>
</tr>
<tr height="20" style="height: 15.0pt;">
<td class="xl65" height="20" style="height: 15.0pt; width: 234pt;" width="312">Output
noise:</td>
<td class="xl65" style="width: 146pt;" width="194">20 mV RMS</td>
</tr>
<tr height="20" style="height: 15.0pt;">
<td class="xl65" height="20" style="height: 15.0pt; width: 234pt;" width="312">Dynamic
range:</td>
<td class="xl65" style="width: 146pt;" width="194">-</td>
</tr>
<tr height="20" style="height: 15.0pt;">
<td class="xl65" height="20" style="height: 15.0pt; width: 234pt;" width="312">THD+N:</td>
<td class="xl65" style="width: 146pt;" width="194">< -60 dB (0.02%)</td>
</tr>
<tr height="20" style="height: 15.0pt;">
<td class="xl65" height="20" style="height: 15.0pt; width: 234pt;" width="312">Mains
voltage:</td>
<td class="xl65" style="width: 146pt;" width="194">230 VAC / 50 Hz</td>
</tr>
<tr height="20" style="height: 15.0pt;">
<td class="xl65" height="20" style="height: 15.0pt; width: 234pt;" width="312">Power
draw:</td>
<td class="xl65" style="width: 146pt;" width="194">< 16 W Idling</td>
</tr>
<tr height="20" style="height: 15.0pt;">
<td class="xl65" height="20" style="height: 15.0pt; width: 234pt;" width="312">Max
current draw:</td>
<td class="xl65" style="width: 146pt;" width="194">< 0.7 A, 230 VAC</td>
</tr>
<tr height="20" style="height: 15.0pt;">
<td class="xl65" height="20" style="height: 15.0pt; width: 234pt;" width="312">Inputs:</td>
<td class="xl65" style="width: 146pt;" width="194">RCA unbalanced</td>
</tr>
<tr height="20" style="height: 15.0pt;">
<td class="xl65" height="20" style="height: 15.0pt; width: 234pt;" width="312">Dimensions:</td>
<td class="xl65" style="width: 146pt;" width="194">200(w) x 130(h) x 100(d), mm</td>
</tr>
<tr height="20" style="height: 15.0pt;">
<td class="xl65" height="20" style="height: 15.0pt; width: 234pt;" width="312">Weight:</td>
<td class="xl65" style="width: 146pt;" width="194">-</td>
</tr>
</tbody></table>
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Снимки<br />
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поглед от долу <br />
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поглед от вътре<br />
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8-те крайни стъпала<br />
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Принципна схема за всеки канал<br />
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В действие<br />
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<!--10w-->Lyubenhttp://www.blogger.com/profile/02937647365236694158noreply@blogger.com0tag:blogger.com,1999:blog-7549324412645018505.post-34353523352092535592014-12-07T03:34:00.000-08:002018-06-12T00:18:55.401-07:00BG2 miniamp v3 - 2x150W@4Ω<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiuIF3ASXhyphenhyphenOa8QHybr2_IF27-4SyIzMoLe1P38sgJHgy6qY8qRQXj6lfHx0BKa8ggwh1NsNaackKTkxaxmtd2Qyos9warO3VyH3AM71DoHewwB_ar7Gz162ot1xnL9rX2qSovfXdjVb2I/s1600/BG2_v3.jpg" imageanchor="1" style="clear: left; float: left; margin-bottom: 1em; margin-right: 1em;"><img border="0" height="320" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiuIF3ASXhyphenhyphenOa8QHybr2_IF27-4SyIzMoLe1P38sgJHgy6qY8qRQXj6lfHx0BKa8ggwh1NsNaackKTkxaxmtd2Qyos9warO3VyH3AM71DoHewwB_ar7Gz162ot1xnL9rX2qSovfXdjVb2I/s1600/BG2_v3.jpg" width="240" /></a></div>
Представям на вашето внимание BG2 miniamp v3 - 2x150W@4<span style="font-family: "Calibri","sans-serif"; font-size: 11.0pt; line-height: 115%; mso-ansi-language: BG; mso-ascii-theme-font: minor-latin; mso-bidi-language: AR-SA; mso-bidi-theme-font: minor-latin; mso-fareast-font-family: Calibri; mso-fareast-language: EN-US; mso-fareast-theme-font: minor-latin; mso-hansi-theme-font: minor-latin;">Ω</span>. Дизайна е вдъхновен от DIY изпълнение на западно-американски конструктор.<br />
<br />
Параметрите на усилвателя са:<br />
Захранващи напрежения +/-42VDC<br />
Мощност 2х150W@4<span style="font-family: "Calibri","sans-serif"; font-size: 11.0pt; line-height: 115%; mso-ansi-language: BG; mso-ascii-theme-font: minor-latin; mso-bidi-language: AR-SA; mso-bidi-theme-font: minor-latin; mso-fareast-font-family: Calibri; mso-fareast-language: EN-US; mso-fareast-theme-font: minor-latin; mso-hansi-theme-font: minor-latin;">Ω</span> 2x90W@8<span style="font-family: "Calibri","sans-serif"; font-size: 11.0pt; line-height: 115%; mso-ansi-language: BG; mso-ascii-theme-font: minor-latin; mso-bidi-language: AR-SA; mso-bidi-theme-font: minor-latin; mso-fareast-font-family: Calibri; mso-fareast-language: EN-US; mso-fareast-theme-font: minor-latin; mso-hansi-theme-font: minor-latin;">Ω</span><br />
Филтриращи кондензатори 4х10000uF/63V HITANO<br />
Ток на покой 50mA на канал.<br />
Наличие на USB аудио DAC на базата на PCM2704 и RCA вход, които се избират с ключе на задния панел.<br />
Наличие на защита за ОТ (озвучителни тела), с мигновено изключване на релето при отпадане на захранването и отложен старт.<br />
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Клип детектор с индикатор на предния панел, който светва на 1V от достигане на ограничението.<br />
Друг индикатор показващ кога усилвателя работи.<br />
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Предстоят ми практически изпитания под товар с осцилоскоп за да валидирам резултатите от симулациите.<br />
След прослушване и стрес тест при високо ниво на музикалния сигнал,
температурно режимите са компенсирани. За звука (въпреки, че все още се
формират електролитите) – Усилвателят свири наистина неутрално и ярко. С
великолепно изразени среди и ВЧ в по ниския регистър (10-12к). В
ниските има присъствие и сериозно разклащане в някой пасажи въпреки, че
средните излизат едни гърди напред. Баса е наситен и мащабен. Средите
са открити и ясни. При нормално ниво на слушане се усеща резерва
по-мощност.<br />
Гласовете са открити, детайлни и някак си грапави. Цялостното възприятие
на музиката изглежда разбираемо, напевно, ясно и добре очертано.<br />
Усилвателят е разискван в <a href="https://bgaudioclub.org/showthread.php?30013-BG2-miniamp-v3-%D0%A7%D0%A0%D0%94">тази тема</a>. Приятно четене.<br />
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Снимки:<br />
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Усилвателят от вътре <br />
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Схема<br />
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Реални измервания<br />
<br />
to be continued...<br />
<span class="fullpost"></span><br />Lyubenhttp://www.blogger.com/profile/02937647365236694158noreply@blogger.com1tag:blogger.com,1999:blog-7549324412645018505.post-80605641726585785862014-10-02T02:23:00.002-07:002014-10-09T02:08:31.206-07:00Освежаване на усилвател Audioanalyse PA-90<div style="text-align: center;">
<b>Освежаване на усилвател Audioanalyse PA-90</b></div>
<div style="text-align: center;">
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<span class="fullpost"></span></div>
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<span lang="EN-US">Усилвателят е </span><span lang="EN-US"><span lang="EN-US">Френско производство </span>модел 1980г. Като за толкова години е доста запазен. По онова време е бил наистина върхово качество на пазара на аудио техника. По спецификация работи до 10W@8Ohm в чист клас А, след което преминава в клас В. Максималната изходна мощност сертифицирана за работа върху 8Ohm е 120W на канал. 34години след това усилвателят се нуждаеше от някой обновления. Малко </span></div>
<a name='more'></a>снимки под капака преди да започнем интервенцията по него.<br />
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<span lang="EN-US">Измерване на филтриращите капацитети в захранването.</span></div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi2_nbLHQ_lBxyQgwsyU-TU2pUkM2zCKlBdd5nPeHe0m4iQqasFhjetmXwjPRkNCVEjV9vnG_vXZIplfmHFJuT4pW3geDmwx9qQKLL3ZqG7Uk-0BfrRYUz6xZLyWLexuX8p8ulDXwG90Pw/s1600/2014-10-09+09.24.25.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi2_nbLHQ_lBxyQgwsyU-TU2pUkM2zCKlBdd5nPeHe0m4iQqasFhjetmXwjPRkNCVEjV9vnG_vXZIplfmHFJuT4pW3geDmwx9qQKLL3ZqG7Uk-0BfrRYUz6xZLyWLexuX8p8ulDXwG90Pw/s1600/2014-10-09+09.24.25.jpg" height="320" width="240" /></a></div>
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<span lang="EN-US"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgzQlz8Us-dZOls8wn6MPe7gqnRh_YpguZbzWShdIcc7wMvwg74-b4gsbQ43ayPE3pm7E_AvNAKIzGGcj0hy3KX9Jc9meEAI7-8nZA-hN-zaM2NLIa9n2A8mocQo36kHriPQ3HIhvvbLr_D/s1600/audioanalyse+reklame+87.jpg" target="_blank">Характеристики</a>: Усилвателят е захранен от мощен 700VA тороидален трансформатор с 4х10 000uF филтриращи капацитети в захранването и напрежения +/-56VDC. Схемата на усилвателя е много интересна и добре позната в профи средите, изградена от двутактен входен диференциален усилвател, напълно огледална (симетрична) топология за усилватели по напрежение (VAS) и мощно крайно стъпало състоящо се от 2х2 крани транзистори TIP35C/36C.</span></div>
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<span lang="EN-US">Една бърза симулация показа завидни стойности на изкривяванията на тази схема при чист клас А - 0,0003%</span><br />
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<span lang="EN-US">При преминаване в клас В (при пълна мощност) изкривянанията достигат едва 0,05%. По всичко личи, че това е класен усилвател, особено през 80-те години.</span><br />
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Интервенциите, които бяха направени по усилвателя са следните:<br />
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<span style="mso-ansi-language: BG;">1.</span><span lang="EN-US"> Изходните терминали тип "щипки" за озвучителни тела бяха сменени с нови по качествени, с родиево покритие на контактите. Виж снимките по долу. </span><span style="mso-ansi-language: BG;"><br /> </span></div>
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<span style="mso-ansi-language: BG;">2. След измерване на капацитета на големите филтриращи кондензатори се установи, че 3 от тях са с намален на половина капацитет от сертифицирания 10 000uF. Единствено един от тях имаше капацитет 9 500uF, а останалите средно 5 500 - 6 500uF. Това наложи смята им с нови 10 000uF/63V марка HITANO серия ELP. </span></div>
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<span style="mso-ansi-language: BG;">3. Сменени са електролитните кондензатори 220uF/16V в обратната връзка на крайните стъпала с нови марка Fujicon, въпреки, че те не бяха загубили капацитета си, е добра практика превантивно да се подменят с нови.</span></div>
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<span style="mso-ansi-language: BG;">4. Сменени са тримерите за настройка на тока на покой и офсета на усилвателните платки с нови, след което са смазани допълнително с цел по дълъг живот.</span></div>
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<span style="mso-ansi-language: BG;">6. Сменена е термопастата на крайните транзистори, тъй като се наложи платките да бъдат демонтирани, за да се извършат другите интервенции, а и все пак пастата е била на повече от 30години.</span></div>
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7. След смяна на елементите бяха почистени и намазани с контактен шпрей цоклите на всички предпазители, след което напръскани с течна грес за предпазнале от последваща корозия.<br />
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8. Последно усилвателя беше настроен с ток на покой гарантиращ работа в чист клас А до 10W@8Ohm и офсет <0 .5v.="" p=""><!--0--><!--0--></0><br />
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Eто и снимки на под капака след освежаването и снимки на цялостния реновиран усилвател.</div>
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Lyubenhttp://www.blogger.com/profile/02937647365236694158noreply@blogger.com0tag:blogger.com,1999:blog-7549324412645018505.post-57546735079000899832013-10-27T08:35:00.001-07:002013-10-27T08:50:05.819-07:00Реконструкция на усилвател Renkfroce HVA-6060<div class="separator" style="clear: both; text-align: center;">
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Усилвателя дойде при мен за добавяне на активен филтър, но в последствие се оказа, че трябва да му се направи освежаване, което прерастна в сериозен мод.<br />
По спецификация оригинално усилвателя трябва да е с мощност 150W/4ома и 100W/8ома. Трансформатора е добре екраниран и с мощност от 500W.<br />
Захранващите напрежения обаче са +/-55V, което предполага по<br />
<a name='more'></a>висока от обявената мощност.<br />
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Като за начало една снимка от вътре:<br />
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Недостатъците се виждат ясно.<br />
- Тънки захранващи кабели.<br />
- Тънки и некачествени сигнални кабели.<br />
- Безмислено разположение на филтриращите кондензатори, които зад радиатора се загряват ненужно, а заради местоположението им имаме двойно по дълги кабели разхождащи се в кутията.<br />
Ето снимка на задния панел на усилвателя:<br />
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И от долната страна леко напукани гумери крачета.<br />
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Моята работа се състоя в следното:<br />
1. Добавен активен филтър за ниски честоти, с който усилвателя може да се ползва за стерео СУБ система. Функцията се пуска посредством двата бутона на предния панел, който преди мода бяха за комутиране на А и Б колони. Всеки бутон ключва съответно ляв/десен канал. Така имаме по голяма гъвкавост на системата. Усилвателя може да си се ползва като напълно функционален, както е оригинално, а при необходимост може да се отрежат средни и високи честоти за да се полва суб, като това може да стане само на единия или на двата канала. Новия филтър има Gain контрол и настройка на честотата на срез от 30 до 150Hz. Също има възможност bridge мод, при който имаме четворно по голяма мощност на 8ома товар. (100Wstereo - 400W мост). В мостов режим усилвателя не бива да су слуша с товар по нисък от 8ома! <br />
2. Сменени с нови филтриращи кондензатори за по високо напрежение и капацитет. Старите бяха с работно напрежение 50V, а работеха с 55V заради, което се бяха понадули и нямаше да изкарат дълго. С новите кондензатори имаме 30 000uF на рамо или общо 60 000uF филтрация. Два пъти повече от преди. <br />
3. Сменени нови сигнални кабели с по качествени.<br />
4. Сменени всички захранващи кабели с два пъти по голямо сечение 1,5mm^2. С промяната на местополжението на новите кондензатори захранващите кабели значително намалиха дължината си. Сменени са и кабелите за изхода на усилвателя, като с изключването на функцията за А и Б канали на предния панел също значително се намали дължината на проводниците. <br />
5. Сменени са изходните терминали с нови по качествени само за един чифт озвучителни тела. <br />
5. Добавен е клип детектор, който следи изхода на усилвателя и индицира кога той започва да ограничава сигнала (кога започва да изкривява сигнала).<br />
6. Сменени са старите напукани гумени крачета с нови дървени с филцова подложка.,<br />
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Ето и снимки след интервенцията.<br />
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усилвателните стъпала.</div>
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новите филтриращи кондензатори монтирани на платка.</div>
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изглед от вътре след изтервенцията.</div>
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задния панел след изтервенцията.</div>
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изглед от долу с новите крачета</div>
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За повече информация пишете на Skype: Lyubcho_88<br />
<br />Lyubenhttp://www.blogger.com/profile/02937647365236694158noreply@blogger.com6tag:blogger.com,1999:blog-7549324412645018505.post-54079628319395470282013-08-26T03:09:00.004-07:002018-06-12T00:21:42.989-07:00A Simple Precision Power Amplifier with analog VU Meter 2x40W@4Ω<div class="separator" style="clear: both; text-align: center;">
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Представям ви поредния усилвател с познатия дизайн, който в последно време се превърна в запазена марка на усилвателите, които конструирам.<br />
Усилвателя е изграден на базата <br />
<a name='more'></a>на дискретна схема с крайни транзистори MJE3055. Захранващо напрежение +/-22V. 2x4бр кондензатори 2200uF/35V HITANO в парлел. Общо 17,600uF филтрация за 2те рамена. Синусоидална мощност от 2<span lang="EN-US">x</span><span lang="RU">40</span><span lang="EN-US">W</span>/4ома при <span lang="EN-US">THD</span><span lang="RU"> 0,1%.</span><br />
<span lang="RU">Стрелковите индикатори са вързани на изхода на стъпалата и индицират изходното ниво, като при 0<span lang="EN-US">db</span> усилвателя е преди клип. Наличен clip индикатор (</span>между стрелковите индикатори), който индицира в червено при влизане в клип (ограничение в изхода).<br />
Входните терминали са <span lang="EN-US">RCA</span><span lang="RU">, </span>изходните тип щипка. Наличен <span lang="EN-US">Volume</span><span lang="EN-US"> </span>контрол.<br />
При тестове под товар 4ома ОТ и максимално изходно ниво +20% THD радиатора загрява до 62°C при околна температура 28°C, това може би е стряскащо за някой потребители, но все пак е важно да отбележим, че усилвателя няма активно охлаждане с вентилатор, както и компактните размери. Въпреки това няма проблеми при по
дълготрайно слушане на музика на максимални нива.<br />
Усилвателя притежава
чудесен звук и висока динамика.
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Перфектен, както за <span lang="EN-US">desktop</span><span lang="EN-US"> </span><span lang="EN-US">PC</span><span lang="EN-US"> </span><span lang="EN-US">amplifier</span>, така и за озвучаване на сбирки с подходящи озвучителни тела.<br />
Останалото се вижда от снимките.<br />
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Поглед от вътре<br />
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Ето и двата канала монтирани на радиатора<br />
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Изправителя с филтровите кондензатори<br />
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И схемата на 2те стъпала<br />
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<span class="fullpost"></span>Lyubenhttp://www.blogger.com/profile/02937647365236694158noreply@blogger.com1tag:blogger.com,1999:blog-7549324412645018505.post-16341704348968196602013-08-23T01:48:00.000-07:002013-09-09T03:22:25.280-07:00YAMAHA AX-930 Реконструкция<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgUJXXoE9DYyEE6DWB0kSpkHL-YxVN4wjcrQirfcz_1QqpcTxd5EyvPG5Utz6DjOCyrdE2HJ7CWrPxq2jwnnTzJLxuCGBRv_rfB_WCTGXmJua_9L0vY4PhgLn6ctxTQhsjkgnGW-cgS2FA/s1600/Yamaha_AX-930_RA.jpg" imageanchor="1" style="clear: right; float: right; margin-bottom: 1em; margin-left: 1em;"><img border="0" height="224" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgUJXXoE9DYyEE6DWB0kSpkHL-YxVN4wjcrQirfcz_1QqpcTxd5EyvPG5Utz6DjOCyrdE2HJ7CWrPxq2jwnnTzJLxuCGBRv_rfB_WCTGXmJua_9L0vY4PhgLn6ctxTQhsjkgnGW-cgS2FA/s320/Yamaha_AX-930_RA.jpg" width="320" /></a></div>
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Усилвателя дойде при мен не в оригинален вид, а изцяло преработен със
сменени трансформатор и крайни стъпала QUAD 520 от тази <a href="http://www.bgaudioclub.org/showthread.php?692-%D0%A3%D1%81%D0%B8%D0%BB%D0%B2%D0%B0%D1%82%D0%B5%D0%BB-QUAD-520&highlight=quad520" target="_blank">тема</a>.<a href="http://www.bgaudioclub.org/showthread.php?692-%D0%A3%D1%81%D0%B8%D0%BB%D0%B2%D0%B0%D1%82%D0%B5%D0%BB-QUAD-520&highlight=quad520" target="_blank"></a><br />
Оригинална е само кутията и радиатора, както и изводите за ОТ. Има
добавена платка за отложен старт на ОТ и защита от право напрежение в
изхода.<br />
Малко снимки на усилвателя в състоянието, в което пристигна <br />
<a name='more'></a>при мен преди интервенцята.<br />
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Личи си старанието, което е вложено в преработката и уменята на
предишния конструктур, който е вградил новите стъпала по схемата на
QUAD520.</div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjs6IuBSVPL_lld_rflIxEDIu-gbSn5vq-9hr7RNlfXCXMjJumMOoNPK4swvWVN1kYr6ih0FgKed6MpNZBdKGfggLmHGPU-MQkQlhJyWSEPQaO78r8NTpoLxrTO6oIQDbY6JZFSUMxo1NM/s1600/2013-08-09+18.38.11.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjs6IuBSVPL_lld_rflIxEDIu-gbSn5vq-9hr7RNlfXCXMjJumMOoNPK4swvWVN1kYr6ih0FgKed6MpNZBdKGfggLmHGPU-MQkQlhJyWSEPQaO78r8NTpoLxrTO6oIQDbY6JZFSUMxo1NM/s320/2013-08-09+18.38.11.jpg" width="320" /></a></div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEifyjnPF4bcEiXBlo0qxrHqemNZnJf-qB4PVK4CZeTS3QN954QjSr9dOWjLg1ATakTWfBWgam3QFTvd7yGiifN9aKtOcHwPBgPTMP-vDQ1QSNTtOXoIcQ-ZXzsgFAiCpkq0ziOno3irASc/s1600/2013-08-09+18.38.21.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEifyjnPF4bcEiXBlo0qxrHqemNZnJf-qB4PVK4CZeTS3QN954QjSr9dOWjLg1ATakTWfBWgam3QFTvd7yGiifN9aKtOcHwPBgPTMP-vDQ1QSNTtOXoIcQ-ZXzsgFAiCpkq0ziOno3irASc/s320/2013-08-09+18.38.21.jpg" width="320" /></a></div>
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За съжаление, те имат накакъв проблем с работата си и след известно
време на работа изгаряли. Тук е мястото да отбележа, че усилвателя
пристигна неработещ. Лично за мен е интересно да разбера какъв е
проблема в тези стъпала и да го отстраня като се надявам гн.Радев да се
включи, ако има желание разбира се и ми се наложи да търся помощ, но
това в друга тема. <br />
По желание на собственика тези стъпала ще се заменят с нови по схема на ЕКСЕЛА от тази <a href="http://www.bgaudioclub.org/showthread.php?5-Excela" target="_blank">тема.</a><br />
Както стана дума по горе е заменен оригиналния трансформатор с друг
тороиден с измерени напрежения на ПХ при мен 2х40VAC. Това осигурява
захранващо напрежение от +/-56V за усилвателните платки с филтрираща
група от 2х22000uF/71V кондензатори специализирани за аудио, марка ELNA.<br />
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<span class="fullpost">На първо време нещата, които не ми харесват са:<br />
-разположението на усилвателните платки в/у радиатора. Новите ще са
монтирани една до друга, легнали на радиатора като крайните транзистори
ще са захванати от долу на повърхността на радиатора.<br />
-радиатора ще бъде боядисан със черен мат за да отдава по добре
температурата в околната среда. Преди това е добре да се обработи със
сода каустик.<br />
-мястото на което са монтирани входните чинчове. Мисля да ги мръдна
леко в дясно (има точно 2 отвора за тях) и ще стоят по на място. От тази
интервенция ще скъсим дължината на сигналния кабел с няколко
сантиметра. В момента самия той е троен екраниран като оплетката е маса,
а останалите 2 жила са 2та канала. Тук бих се радвал, ако колегата ivos
се намеси и каже дали това е правилно, или по добре да са 2 отделни
екранирани кабели от чинчовете до потенциометъра, като се обединяват
само при чинчовете. Сегашното връзване според мен е предпоставка за
брумене въпреки, че собственика не се е оплаквал от подобно нещо. Това
трябва да се тества.<br />
-сигналните кабели от потенциометъра до стъпалата са вързани без
оплетката и ще бъдат заменени с нови двойни, тъй като и без това вече
едното от стъпалата ще е на по голямо разстояние от другото.<br />
-много отвори има отзад на панела за чинчове, който са премахнати и
седи някак грозно. Трябва да се помисли за затварянето им (скриването
им).<br />
-захранващия кабел по молба на собственика ще бъде заменен с тройна
букса за 230VAC (от тези, които се слагат по PC захранванията)<br />
-захранващите кабели за усилвателните платки може би ще се сменят с
нови с по голям диаметър, макар сегашните да са къси и достатъчно
дебели. Това в последствие ще установя в хода на работа.</span><br />
<br />
<span class="fullpost">Понеже радиатора ми се видя леко слаб за да може да разсее необходимата обявена от производителя мощност поразрових и по DIN стандарт на същия фабричен усилвател с по мощен трансформатор и този радиатор му дават 200W/4ома на канал на 1kHz </span><a href="http://www.manualslib.com/manual/351044/Yamaha-Ax-930.html?page=11#manual" target="_blank">ЦЪК</a><br />
Не знам как се е справял, но едва ли ще го пуснат с бъг от прегряване. Това до някъде даде надежда, че няма да има проблеми, но все пак направих всичко възможно за да се подобри работата му. Радиатора беше предварително обработен със сода каустик, (така нареченото импрегниране на алуминий) след това почернен с черен, като е оставено небоядисано място само там където контактуват крайните транзистори. <br />
<br />
Ето вече обработката на радиатора и разположените 2 канала на ЕКСЕЛА "black edition" <img alt="" border="0" class="inlineimg" src="http://www.bgaudioclub.org/images/smilies/icon_cool.gif" title="Cool" />. <br />
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<br />
<span class="fullpost">Платките са монтирани в кутията "надолу с главата" за да може по естествен начин топлината да се отделя в горната част на радиатора.</span><br />
<br />
<span class="fullpost">Масата на филтровите кондензатори според мен не беше направена както
трябва (вижда се горе на снимките със кондензаторите), а тази тел образува кръг, който би спомогнал за наличието на
брум. </span><span class="fullpost">Затова малко я преработих. </span><br />
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<br />
<span class="fullpost">И така накратко какво е свършено по усилвателя.<br />
1.Смяна на крайните стъпала с изцяло нови по схема ЕКСЕЛА<br />
2.Обработка на радиатора (почерняне) и промяна на разположението на крайните транзистори.<br />
3.Затапване на всички отвори, останали от липсващи чинчове по задния панел.<br />
4.Смяна на кабела за 230VAC с тройна букса.<br />
5.Изцяло ново окабеляване и преаранжиране в кутията към стъпалата, както
от захранването, така и сигналните. Преработка на звездния център. Кабелите на захранването са
предварително оплетени. <br />
6.Добавена термична защита на радиатора, която сработва на 70°С.<br />
7.Добавен клип индикатор, като се ползва стандартния диод монтиран на предния панел.<br />
Ток на покой на стъпалата 100мА общо на два срещуположни крайни
транзистора. Тоест в покой 2те стъпалата общо разсейват около 22W.<br />
<br />
Малко измервания:<br />
1kHz точно преди клипване на 8ома, измерено напрежение 44,6V и мощност в/у товара 124W</span><br />
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1kHz точно преди клипване на 4ома, измерено напрежение 39,7V и мощност в/у товара 197W<br />
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<br />
След работа с максимално ниво на 8ома ОТ за 40мин радиатора имаше максимална стойност на температурата от 52°С.<span class="fullpost"></span><br />
<span class="fullpost">Ето и поглед на кутията от горе със всичко монтирано, както и на преден/заден панел.</span><br />
<span class="fullpost"><br /></span>
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<span class="fullpost"><br /></span>
<span class="fullpost">Поздрави,</span><br />
<span class="fullpost">LA Sound</span>Lyubenhttp://www.blogger.com/profile/02937647365236694158noreply@blogger.com0tag:blogger.com,1999:blog-7549324412645018505.post-67330063000841739512013-08-23T01:43:00.000-07:002013-08-23T01:43:46.403-07:00Kenwood M2A Реконструкция<br />
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiFMc6cUpifnazZX_Jbt9xppU9OxCr5jc1FNVk4xu7BH08oKZt3N9sPNYLtYoAVL6-3aQY1Tb0-VE4hp8XHhv3nZ8p7O9uD8eMqQUSmZFejRbVeAfkcq1r1kv0MTlfHu34SThBpEfVH0qk/s1600/kenwood-basic-m2a-01.jpg" imageanchor="1" style="clear: right; float: right; margin-bottom: 1em; margin-left: 1em;"><img border="0" height="212" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiFMc6cUpifnazZX_Jbt9xppU9OxCr5jc1FNVk4xu7BH08oKZt3N9sPNYLtYoAVL6-3aQY1Tb0-VE4hp8XHhv3nZ8p7O9uD8eMqQUSmZFejRbVeAfkcq1r1kv0MTlfHu34SThBpEfVH0qk/s320/kenwood-basic-m2a-01.jpg" width="320" /></a></div>
Един много добър усилвател (в оригиналния си вид), за жалост дойде при мен почти изцяло променен. Крайните стъпала бяха премахнати, на тяхно място имаше някакви със съмнителен произход, като личаха неколкократни опити за ремонт в/у тях от неопитни или немърливи "майстори".<br />
Ето малко информация + снимки на този усилвател в оригиналния му вид <a href="http://www.wired4sound.net.au/amplifiers/kenwood_M2A/kenwood_M2A.htm" target="_blank">ЦЪК</a>.<br />
<a name='more'></a><br />
А това представлява вътрешността му.<br />
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2х220W/8ома синусойдална чиста мощност от този красавец. Но да спрем до тук с оригиналната визия.<br />
<br />
<br />
Eто и няколко снимки под капака за да се види състоянието преди да дойде при мен.<br />
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И така в крайна сметка, аз се заех с този усилвател и
вградих в него 2 платки от новата разработка на схема ЕКСЕЛА про версия с
допълненията.<br />
<a href="http://www.bgaudioclub.org/showthread.php?8860-EXCELA&p=244562&viewfull=1#post244562" target="_blank">ТУК</a> е обсъждана схемата и платката.<br />
Стъпалата се захранват с +/-70V, което е голямото напрежение от захранването.
Както стана ясно напред в темата оригинално този усилвател е бил с волтодобавка
(напрежения +/-50V и добавка +/-20V). Наложи се да изрина доста от чарколяка
вътре, после рязане на платки, преправяне, но крайния резултат си струваше.<br />
Запазени са всички функции на предния панел - селектора и хубавите индикатори,
както и Volume контрола.<br />
Наложи се да се направят отвори на задния панел за охлаждане на радиаторите, като модула е
съставен от тунелни радиатори с активно охлаждане. Вентилатора съм го пуснал на
50% от максималните обороти за да не шуми много. <span lang="EN-US" style="mso-ansi-language: EN-US; mso-fareast-language: BG; mso-no-proof: yes;"><span style="mso-tab-count: 1;"> </span></span><br />
Общо взето екстрите на платката на екселата няма да ги коментирам подробно. В
конкретната конфигурация те са: защита за ОТ с мек старт и моментално иключване
при отпадане на захранването, клип индикатор, full и low pass вход - който се конфигурира
със промяната на 2 джъмпера на платката. По нататък собственика беше споменал, че мисли да ползва стъпалота като усилвател са СУБ-БАС. Честотата на срез на филтъра е
фиксирана на 100Hz с гейн 50% от максимума при монтиран потенциометър. Входната
чувствителност без low pass филтъра е около 1V rms - 1,41 peak (малко по ниско
от стандарта, собственика спомена, че ще ползва пред усилвател). <br />
При тестовете ми с товар колони 8ома радиаторите след 1час на макс употреба
едвам бяха стоплили. Очакваната мощност тук при товар 4ома е 420W rms на канал.
Не съветвам никой да го слуша на по малко от 4ома. Иначе схемата е доловно
презапасена за тези напрежения, според SOA кривата сме под DC чертата. <br />
Малко снимки от хода на работа, тестовете и крайния резултат</div>
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<span class="fullpost"></span>Lyubenhttp://www.blogger.com/profile/02937647365236694158noreply@blogger.com1tag:blogger.com,1999:blog-7549324412645018505.post-53259302755394974242013-08-05T01:48:00.002-07:002013-08-05T01:50:15.420-07:00ОТ проект 10" 120W с LM1000 и FRS8M<br />
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Въпреки, че колоните са направени преди доста врече, чак сега публикувам проекта тук.<br />
Проекта е с говорители:<br />
НЧ Радимекс LM1000<br />
<a href="http://radimexbg.com/product_images/LW1000.jpg" target="_blank">http://radimexbg.com/product_images/LW1000.jpg</a><br />
и Широколентовите FRS8M<br />
<a href="http://www.visaton.de/en/industrie/breitband/frs8m_8.html" target="_blank">http://www.visaton.de/en/industrie/b...d/frs8m_8.html</a><br />
За визията им този път съм се водил изцяло от пропорцийте на <br />
<a name='more'></a>профи колони, скосени и предвидени за монташ на ферми и окачени да висят като ако се наредят повечко бройки става окръжност от ОТ и по добро озвучаване на открити места. Типично този монтаж се ползва при големи мероприятия, като концерти на големи рок групи и др.<br />
Работния обем е около 43литра, като 2л. са
отделени в малкото обемче за FRS-то и останалото за баса. Направил съм
едно подобрение на широколентовите нещо като фланец и по големи отвори
за да може да дишат.<br />
Ето нагледна снимка:<br />
<br />
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Бас рефлекса е правоъгълен, равнобедрен триъгълник с катети 7,5см и
дължина назад 200мм. По сметки последно е настроен на 40-45Hz.<br />
Финиша както се вижда и от предишните е черен филц. Вътре по всички
стени освен предната има вата 3см на два слоя общо 6см. от тази
обемната.<br />
Филтрите са 2ри ред за широколентовия, а НЧ LW1000 пусат без филтър.<br />
Колоните ще се ползват предимно на купони и събирания. Няма да се жалят,
затова трябва да са взети всички мерки за безопастност. Предвидил съм
предпазни решетки, които се виждат на снимките.<br />
Снимки от процеса на работа и вече готовите колонки. <br />
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<span class="fullpost"></span><br />Lyubenhttp://www.blogger.com/profile/02937647365236694158noreply@blogger.com0tag:blogger.com,1999:blog-7549324412645018505.post-32693310568994252312012-06-19T06:43:00.001-07:002012-06-19T06:43:16.792-07:00Музика за вилата.<br />
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhwsv_8bPpLlaQigVsKdkJ6wYgNj9qe4CTXhuTPW3t7GWapIoUvir3RSSoXakBnlLn7lNHyvFjifg-CH8zK1knLf8Rtq3LJoeRWk6vBZ1Okz_YqhkpbV-MbxniwnKHhyzqTOzxr5H_5YjM/s1600/1.jpg" imageanchor="1" style="clear: left; float: left; margin-bottom: 1em; margin-right: 1em;"><img border="0" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhwsv_8bPpLlaQigVsKdkJ6wYgNj9qe4CTXhuTPW3t7GWapIoUvir3RSSoXakBnlLn7lNHyvFjifg-CH8zK1knLf8Rtq3LJoeRWk6vBZ1Okz_YqhkpbV-MbxniwnKHhyzqTOzxr5H_5YjM/s320/1.jpg" width="320" /></a>Реших да направя някакво непретенциозно озвучение за барбекюто на вилата. Лятно време често се събираме и като се разгорещиме е много приятно да има и музика. Цялата система е от почти непотребни неща останали с течение на времето.<br />
Усилвателя е изграден на базата на интегрални чипове TDA2050 по едно-полярна схема. Захранването е извън кутията, импулсно 32VDC стабилизирано. Двата канала са вързани в мост.<br />
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<a name='more'></a>Минималния товар е 4ома общо. Кутията е от старо PC захранване. Добавих и вентилатор да отвежда ненужната топлина от кутията навън, като работи на 10V за да не се чува. Усилвателя има микрофонен вход (за да се поздравяваме и като има караоке вечер :) ). Входните терминали са RCA, изходните банан щекер. Има изведен clip индикатор на предния панел. Налична защита от късо и термо защита в чиповете.<br />
Колонките са с някакви неизвестни мид-басчета. Премерих ги и според TS параметрите изчислих обема на кутиите. Те са затворен обем 7-7,5l. ВЧ са пиезо. Приблизителна мощност около 40-60W. Кутиите са от 18мм ПДЧ. Вътре има стабилно вата. Финиша им е черна боя.<br />
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjSA3Hz8Y0gUqQmITDJk4BTzxaSk1NERqySmQ1sbHm5qpROqf7QsMjXF5g7mWYklEu7dUvnqw_MCx1MWyWPtuSml7EV-Cj_gtBq9-sDzxzJv2DtzMA2Ww-gFLm6xK19TzL6aTupXZ38sRs/s1600/14.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjSA3Hz8Y0gUqQmITDJk4BTzxaSk1NERqySmQ1sbHm5qpROqf7QsMjXF5g7mWYklEu7dUvnqw_MCx1MWyWPtuSml7EV-Cj_gtBq9-sDzxzJv2DtzMA2Ww-gFLm6xK19TzL6aTupXZ38sRs/s320/14.jpg" width="320" /></a></div>Lyubenhttp://www.blogger.com/profile/02937647365236694158noreply@blogger.com2tag:blogger.com,1999:blog-7549324412645018505.post-86098990059391514822012-04-18T14:49:00.001-07:002018-06-12T00:48:57.415-07:00TDA2050 BRIDGE 2x80W<div class="MsoNormal">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhnicboZmvuR0RpObtobRZWdx4MkrSszJfRaLSvgddn_Sh6iGGwclCATT-SIABPPPo24uI8iXF4gUyF1rSJzXoAeEqD5MDp_nL7UWuA_mqMy8hq1X3vHFy7vhtOXmvz7_yKm3pb37CQO_8/s1600/1.jpg" imageanchor="1" style="clear: left; float: left; margin-bottom: 1em; margin-right: 1em;"><img border="0" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhnicboZmvuR0RpObtobRZWdx4MkrSszJfRaLSvgddn_Sh6iGGwclCATT-SIABPPPo24uI8iXF4gUyF1rSJzXoAeEqD5MDp_nL7UWuA_mqMy8hq1X3vHFy7vhtOXmvz7_yKm3pb37CQO_8/s320/1.jpg" width="320" /></a>Усилвател изграден на базата на мостово свързани интегрални чипове <a href="http://www.st.com/content/ccc/resource/technical/document/datasheet/1d/71/14/1e/5d/cf/47/01/CD00000131.pdf/files/CD00000131.pdf/jcr:content/translations/en.CD00000131.pdf">TDA2050</a><span lang="RU">. </span><br />
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Стрелковите индикатори са вързани на изхода на стъпалата и индицират изходното ниво, като при 0<span lang="EN-US">db</span> усилвателя е преди клип. Между тях има светодиод, който индицира в червено при влизане в клип. </div>
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<a name='more'></a>4x4700uF + 2x10 000uF + 2x2200uF кондензатори при чиповете и във филтърната група. Общо 43 200uF филтрация. Входните терминали са <span lang="EN-US">RCA</span><span lang="RU">, </span>изходните тип щипка. Наличен <span lang="EN-US">Volume</span><span lang="EN-US"> </span>контрол. При тестове под товар 4ома и максимално изходно ниво радиатора загрява не повече, от 45°C, което гарантира безупречна работа при по дълготрайно слушане на музика на максимални нива. Усилвателя притежава чудесен звук и голяма динамика.</div>
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Перфектен, както за <span lang="EN-US">desktop</span><span lang="EN-US"> </span><span lang="EN-US">PC</span><span lang="EN-US"> </span><span lang="EN-US">amplifier</span>, така и за озвучаване на сбирки с подходящи озвучителни тела.<br />
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Характеристики
/ Specifications<br />
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<table border="0" cellpadding="0" cellspacing="0" style="width: 506px;"><colgroup><col style="mso-width-alt: 11410; mso-width-source: userset; width: 234pt;" width="312"></col>
<col style="mso-width-alt: 7094; mso-width-source: userset; width: 146pt;" width="194"></col>
</colgroup><tbody>
<tr height="20" style="height: 15.0pt;">
<td class="xl65" height="20" style="height: 15.0pt; width: 234pt;" width="312">Input
sensitivity:</td>
<td class="xl65" style="width: 146pt;" width="194">1.00 Vpp</td>
</tr>
<tr height="20" style="height: 15.0pt;">
<td class="xl65" height="20" style="height: 15.0pt; width: 234pt;" width="312">Input
impedance:</td>
<td class="xl65" style="width: 146pt;" width="194">22 kΩ</td>
</tr>
<tr height="20" style="height: 15.0pt;">
<td class="xl65" height="20" style="height: 15.0pt; width: 234pt;" width="312">Voltage
gain:</td>
<td class="xl65" style="width: 146pt;" width="194"> +27 dB</td>
</tr>
<tr height="20" style="height: 15.0pt;">
<td class="xl65" height="20" style="height: 15.0pt; width: 234pt;" width="312">Peak
power output:</td>
<td class="xl65" style="width: 146pt;" width="194">80 W / 4 Ω, 40 W<span style="mso-spacerun: yes;"> </span>/ 8 Ω</td>
</tr>
<tr height="20" style="height: 15.0pt;">
<td class="xl65" height="20" style="height: 15.0pt; width: 234pt;" width="312">Peak
output voltage:</td>
<td class="xl65" style="width: 146pt;" width="194">26 VAC, ±37 Vpp</td>
</tr>
<tr height="20" style="height: 15.0pt;">
<td class="xl65" height="20" style="height: 15.0pt; width: 234pt;" width="312">Peak
output current:</td>
<td class="xl65" style="width: 146pt;" width="194">3A</td>
</tr>
<tr height="20" style="height: 15.0pt;">
<td class="xl65" height="20" style="height: 15.0pt; width: 234pt;" width="312">Quiescent
drain current, mA</td>
<td class="xl65" style="width: 146pt;" width="194">50 mA</td>
</tr>
<tr height="20" style="height: 15.0pt;">
<td class="xl65" height="20" style="height: 15.0pt; width: 234pt;" width="312">Power
output 8 Ω, sine wave, RMS</td>
<td class="xl65" style="width: 146pt;" width="194">32 W</td>
</tr>
<tr height="20" style="height: 15.0pt;">
<td class="xl65" height="20" style="height: 15.0pt; width: 234pt;" width="312">Power
output 4 Ω, sine wave, RMS</td>
<td class="xl65" style="width: 146pt;" width="194">64 W</td>
</tr>
<tr height="20" style="height: 15.0pt;">
<td class="xl65" height="20" style="height: 15.0pt; width: 234pt;" width="312">Frequency
range: -3dB</td>
<td class="xl65" style="width: 146pt;" width="194">20 Hz - 80 kHz </td>
</tr>
<tr height="20" style="height: 15.0pt;">
<td class="xl65" height="20" style="height: 15.0pt; width: 234pt;" width="312">Full-power
bandwidth:</td>
<td class="xl65" style="width: 146pt;" width="194">20 Hz - 30 kHz</td>
</tr>
<tr height="20" style="height: 15.0pt;">
<td class="xl65" height="20" style="height: 15.0pt; width: 234pt;" width="312">Minimum
rated load:</td>
<td class="xl65" style="width: 146pt;" width="194">4 Ω</td>
</tr>
<tr height="20" style="height: 15.0pt;">
<td class="xl65" height="20" style="height: 15.0pt; width: 234pt;" width="312">Damping
factor:</td>
<td class="xl65" style="width: 146pt;" width="194">> 500</td>
</tr>
<tr height="20" style="height: 15.0pt;">
<td class="xl65" height="20" style="height: 15.0pt; width: 234pt;" width="312">Output
noise:</td>
<td class="xl65" style="width: 146pt;" width="194">40 mV RMS</td>
</tr>
<tr height="20" style="height: 15.0pt;">
<td class="xl65" height="20" style="height: 15.0pt; width: 234pt;" width="312">Dynamic
range:</td>
<td class="xl65" style="width: 146pt;" width="194">-</td>
</tr>
<tr height="20" style="height: 15.0pt;">
<td class="xl65" height="20" style="height: 15.0pt; width: 234pt;" width="312">THD+N:</td>
<td class="xl65" style="width: 146pt;" width="194">< -57 dB (0.04%)</td>
</tr>
<tr height="20" style="height: 15.0pt;">
<td class="xl65" height="20" style="height: 15.0pt; width: 234pt;" width="312">Mains
voltage:</td>
<td class="xl65" style="width: 146pt;" width="194">230 VAC / 50 Hz</td>
</tr>
<tr height="20" style="height: 15.0pt;">
<td class="xl65" height="20" style="height: 15.0pt; width: 234pt;" width="312">Power
draw:</td>
<td class="xl65" style="width: 146pt;" width="194">< 7.4 W Idling</td>
</tr>
<tr height="20" style="height: 15.0pt;">
<td class="xl65" height="20" style="height: 15.0pt; width: 234pt;" width="312">Max
current draw:</td>
<td class="xl65" style="width: 146pt;" width="194">< 0.56 A, 230 VAC</td>
</tr>
<tr height="20" style="height: 15.0pt;">
<td class="xl65" height="20" style="height: 15.0pt; width: 234pt;" width="312">Inputs:</td>
<td class="xl65" style="width: 146pt;" width="194">RCA unbalanced</td>
</tr>
<tr height="20" style="height: 15.0pt;">
<td class="xl65" height="20" style="height: 15.0pt; width: 234pt;" width="312">Dimensions:</td>
<td class="xl65" style="width: 146pt;" width="194">...(w) x ...(h) x ...(d), mm</td>
</tr>
<tr height="20" style="height: 15.0pt;">
<td class="xl65" height="20" style="height: 15.0pt; width: 234pt;" width="312">Weight:</td>
<td class="xl65" style="width: 146pt;" width="194">-</td>
</tr>
</tbody></table>
<br />
<br />
Снимки:</div>
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Lyubenhttp://www.blogger.com/profile/02937647365236694158noreply@blogger.com6tag:blogger.com,1999:blog-7549324412645018505.post-78578998074760252472012-04-10T10:31:00.008-07:002012-05-19T07:25:58.881-07:00Близнака №2 2x80W<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiGCRUzY8rQT-R-4AwcD0UHmGYA0KQnH-pUoe7tTMTT40dZCWfoOqlFIhfDE26kEqXl75m5-WCOp1D2DmGmzgjraL62HbIJ2o0eQv2i586C1UE7AjbPtDxLmFukhq9uM-EwJdNnpl5XH1k/s1600/1.jpg" imageanchor="1" style="clear: left; float: left; margin-bottom: 1em; margin-right: 1em;"></a><span class="fullpost"></span><br />
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiGCRUzY8rQT-R-4AwcD0UHmGYA0KQnH-pUoe7tTMTT40dZCWfoOqlFIhfDE26kEqXl75m5-WCOp1D2DmGmzgjraL62HbIJ2o0eQv2i586C1UE7AjbPtDxLmFukhq9uM-EwJdNnpl5XH1k/s1600/1.jpg" imageanchor="1" style="clear: left; float: left; margin-bottom: 1em; margin-right: 1em;"><img border="0" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiGCRUzY8rQT-R-4AwcD0UHmGYA0KQnH-pUoe7tTMTT40dZCWfoOqlFIhfDE26kEqXl75m5-WCOp1D2DmGmzgjraL62HbIJ2o0eQv2i586C1UE7AjbPtDxLmFukhq9uM-EwJdNnpl5XH1k/s320/1.jpg" width="320" /></a>Ето, че и втория усилвател от партидата с двете еднакви кутии стана готов. От начало идеята беше външно и двата да са еднакви, като се различават само схемите използвани в тях. В течение на времето реших да поекспериментирам малко и да се отдалеча от първоначалния замисъл. Този вариант е без стрелкови индикатори, но има честотна корекция на ниски и високи (bass treble).<br />
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<a name='more'></a><br />
На визия стана много привлекателен, като малките размери придават невероятна компактност и мобилност на усилвателя. Музиката има добра ударност и висока динамика. Перфектен за настолен PC усилвател, а защо не и за озвучаване на малки партита у дома.<br />
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Изходна мощност 2х80W rms на 4ома. Изграден е на базата на така нареченана от мен ПЯЛ схема клас Б. Честотна лента 2,7Hz - 88kHz при -3db. Захранен с тороидален трансформатор 150W. Захранващи напрежения +/-34V. Филтриращите кондензатори са 6х4700uF на рамо <span lang="EN-US">Fujicon</span><span lang="EN-US"> </span><span lang="EN-US">RA</span><span lang="EN-US"> </span><span lang="EN-US">series</span><span lang="EN-US"> </span>общо 12 за двете рамена, което прави 56 400uF филтрация . Наличен volume контрол и клип индикатор за изходното ниво. Входни терминали RCA, изходни тип щипка. При тестовете на ОТ 6ома радиаторите почти не загряват при максимално ниво на музикалния сигнал.<br />
Останалото се вижда от снимките.</div>
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схемата на ПЯЛ стъпалата</div>
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</span>Lyubenhttp://www.blogger.com/profile/02937647365236694158noreply@blogger.com3tag:blogger.com,1999:blog-7549324412645018505.post-18276618003186991972012-04-07T13:19:00.013-07:002012-04-10T10:46:59.748-07:00QUASI amplifier 2x180W<span class="fullpost"></span><br />
<div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj-2RLAw4cUsZOzRVblh8pFDempWYTRhHdf1P7G3pcS8R-sRGwEMuOqkXxnMR4HeSdCxL1J35xvo39-fus5TTP-BQMkQcBiUoSq1nzgzN8z1QXTp6NyuCK4WlDw1-CA1czFPCsUlw0gwnY/s1600/3.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"> </a></div><div class="MsoNormal"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhTbIz0PWRlR9vzaQqpE0UFdfR5KKlUAR5_F8NWDK92UrjH1Nmf_oy_aU2IC98TkQtO8I9AvCzh4q-PN4s0_siT85-9dgoGc5eYGCTg5epHV7YvnCIOVjLroQMaYMmUSyt8169SiNDCl4I/s1600/1.jpg" imageanchor="1" style="clear: left; float: left; margin-bottom: 1em; margin-right: 1em;"><img border="0" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhTbIz0PWRlR9vzaQqpE0UFdfR5KKlUAR5_F8NWDK92UrjH1Nmf_oy_aU2IC98TkQtO8I9AvCzh4q-PN4s0_siT85-9dgoGc5eYGCTg5epHV7YvnCIOVjLroQMaYMmUSyt8169SiNDCl4I/s320/1.jpg" width="320" /></a>Eто че и следващият вариант на усилвател попопулярната схема на гн.Миле Славкочич QUASI е вече факт. Усилвателят стана, като копие (отвънка) на предишни мой разработки, явно защото тази концепция най - допадна на човека поискал от мен да го направя. </div><div class="MsoNormal">Усилвателя е изграден на базата на мощен 500W тороидален трансформатор. Стъпалата са с по 2 крайни транзистора на рамо (общо 8 крайни за двете стъпала). </div><div class="MsoNormal"></div><a name='more'></a><br />
<div class="MsoNormal">Без проблеми захранва 4омови ОТ, като отдаваната в тях синусоидална мощност е 2x180W rms.Захранващите напрежения са +/-46V, а спада при пълно натоварване е нищожен. Филтърната група е 3x4700uF/50V Fujicon RA серия. Общо 6 кондензатора за 2те рамена. Входните терминали са RCA, изходните са подходящи за банан-щекер. Наличен Volume контрол. Индикацията е със стрелкови VU метри.</div><div class="MsoNormal">Заигравката тук беше с специално направените капаци, които да скрият крайните транзистори и да предпазят от евентуално късо от корпусите им, защото са въшно разположени и по време на работа са под напрежение. Останалото се вижда от снимките.</div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj-2RLAw4cUsZOzRVblh8pFDempWYTRhHdf1P7G3pcS8R-sRGwEMuOqkXxnMR4HeSdCxL1J35xvo39-fus5TTP-BQMkQcBiUoSq1nzgzN8z1QXTp6NyuCK4WlDw1-CA1czFPCsUlw0gwnY/s1600/3.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj-2RLAw4cUsZOzRVblh8pFDempWYTRhHdf1P7G3pcS8R-sRGwEMuOqkXxnMR4HeSdCxL1J35xvo39-fus5TTP-BQMkQcBiUoSq1nzgzN8z1QXTp6NyuCK4WlDw1-CA1czFPCsUlw0gwnY/s320/3.jpg" width="320" /></a></div><div class="separator" style="clear: both; text-align: center;"><br />
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</span>Lyubenhttp://www.blogger.com/profile/02937647365236694158noreply@blogger.com2tag:blogger.com,1999:blog-7549324412645018505.post-4798077335300091172012-03-01T06:35:00.004-08:002012-04-10T10:55:13.648-07:00Близнаците 2x90W :)<div class="" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjnvV-JPitAQy_YQmJGFJh9Ife7osc_xO9j0qKZfUT4ESZ1C6fsrlDdzCdJ50Oi4ZTi_xqS_j1WMI-69Z3IxRQPxWYdUo9a3T2_XhpWz6_SWblDZaae1w66TWzhT4Lq6Li4kx9qBrkcSdg/s1600/29022012726.jpg" imageanchor="1" style="clear: left; float: left; margin-bottom: 1em; margin-right: 1em;"><img border="0" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjnvV-JPitAQy_YQmJGFJh9Ife7osc_xO9j0qKZfUT4ESZ1C6fsrlDdzCdJ50Oi4ZTi_xqS_j1WMI-69Z3IxRQPxWYdUo9a3T2_XhpWz6_SWblDZaae1w66TWzhT4Lq6Li4kx9qBrkcSdg/s320/29022012726.jpg" width="320" /></a><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhPEgxg3W9dADdIo6tvpDURHE7Zxmn60d_J4LmnyR6OYpXmGX5RwlUQ_Hq5RsbWIu1fXHWwUVtqiDV6mQp3WZ_afttyE2Pqi1pUtKgFxZEmJCIJR-EXTI4Gtq2t1lJUnbOfJgoQvK8eR5c/s1600/01032012734.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"> </a></div>И така, вече първия е завършен. Спеццификацийте са следните:<br />
Стъпалата са по малко модифицирана схема <a href="http://sound.westhost.com/project3a.htm" target="_blank">P3A</a> на Rod Elliott. Синусоидална мощност при 4ома 2х90W, при 8ома 2х54W.<br />
Захранващи напрежения +/-38V, филтриращи кондензатори 4х4700uF/50V Fujicon RA Series. Налични VU-метри и Clip индикация.<br />
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<a name='more'></a><br />
На предния панел има ON/OFF ключ и Volume контрол. Изходните терминали са тип щипка, входни - позлатени RCA.<br />
Eто и клипче на усилвателя в действие.<br />
<a href="http://vbox7.com/play:67285dff19" target="_blank">http://vbox7.com/play:67285dff19</a><br />
Следва да започна и другия. <br />
Малко снимков материал:<br />
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<div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjpaacUSugJeK4m6lC3VJs5TaD5CGymEVRLhXEXkFD9TxQ1Z6NwbYpPeW9HAokP5ktOHlv2weXf5GK-Qw9p6UAJs9LHVK92LfNlYJnEKfrv1PyCKUaJm719hOfRuYfFxN3hFhk2jgBp3XQ/s1600/29022012724.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjpaacUSugJeK4m6lC3VJs5TaD5CGymEVRLhXEXkFD9TxQ1Z6NwbYpPeW9HAokP5ktOHlv2weXf5GK-Qw9p6UAJs9LHVK92LfNlYJnEKfrv1PyCKUaJm719hOfRuYfFxN3hFhk2jgBp3XQ/s320/29022012724.jpg" width="320" /></a></div>Lyubenhttp://www.blogger.com/profile/02937647365236694158noreply@blogger.com2tag:blogger.com,1999:blog-7549324412645018505.post-66109930900982732692012-03-01T06:31:00.001-08:002012-03-01T22:58:08.558-08:00Активни ОТ с LW1200<div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjG8aOgFakpblsKfuMlstyMJ1sj-wzG60w6R2eUH_-TRs8tiCGvD84F3pt1XHseZ8rZpfQ1ONcQcxM0pOlLouQodzKd6alLqyjqUyO40iSWQezt6SXbOQoRUGdsO0nH7RuQrSSuU_c_sVI/s1600/2.jpg" imageanchor="1" style="clear: left; float: left; margin-bottom: 1em; margin-right: 1em;"><img border="0" height="320" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjG8aOgFakpblsKfuMlstyMJ1sj-wzG60w6R2eUH_-TRs8tiCGvD84F3pt1XHseZ8rZpfQ1ONcQcxM0pOlLouQodzKd6alLqyjqUyO40iSWQezt6SXbOQoRUGdsO0nH7RuQrSSuU_c_sVI/s320/2.jpg" width="239" /></a></div><br />
Отскоро проекта с <a href="http://lyuben-diyprojects.blogspot.com/2011/11/12.html" target="_blank">LW1200</a> на Радимекс станаха активни.<br />
Стъпалата са quasi - по познатата схема. Захранващи напрежения +/-35V. Трафа е 400VA, филтрови кондензатори 10х4700uF. Мощност - достатъчна <img alt="" border="0" class="inlineimg" src="http://www.bgaudioclub.org/images/smilies/icon_biggrin.gif" title="Very Happy" />. Има volume control и клип индикация за двата канала.<br />
Снимки<br />
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<div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg5S4nuw-bs51LOYTjqnjuuAZS2r3ic2BNYOFZzMZJrer73rxXBVHDXyxG8sIdjZAr7RrSiiOaZz34i2bTTtQ3CcqDA5vNKDvTBFCxtkNmeG44lQhLIFh9x0-uPc8whlzKqAygR4-EkRdQ/s1600/1.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg5S4nuw-bs51LOYTjqnjuuAZS2r3ic2BNYOFZzMZJrer73rxXBVHDXyxG8sIdjZAr7RrSiiOaZz34i2bTTtQ3CcqDA5vNKDvTBFCxtkNmeG44lQhLIFh9x0-uPc8whlzKqAygR4-EkRdQ/s320/1.jpg" width="320" /></a></div>Lyubenhttp://www.blogger.com/profile/02937647365236694158noreply@blogger.com0tag:blogger.com,1999:blog-7549324412645018505.post-52256606081361542532012-01-01T12:19:00.002-08:002015-05-15T12:32:50.213-07:004xTDA7293 2x160W HI-END amplifier<span class="fullpost"></span><span class="fullpost"></span><br />
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiC0Vc2UjZQJxycQ6E3mFwpMaxoP_rbRXzE3_8pt5KOpTopr0t98rr_ZkU-GwM0aQ_Ztu1q5Nz63KSAivelMWH8B5WZbZVbo4jehJiOYgvLCQ9DcQGTEZSqcU4rGlyOdDjkyscoJBRU2sA/s1600/22122011451.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"> </a></div>
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjqiW0lwtUApE4XYAYlpE3OOItKPvggOYEdJrYF4rrLQJrCk5gdbqV5IyICFVCqf8FLuna6_Q9iF4r1NENzOtc23bOOAynuIBxDGt7sO7GMWkr8dUVrnKhaIIzaQWt8vB9bxELVaNtNKoU/s1600/28122011505.jpg" imageanchor="1" style="clear: left; float: left; margin-bottom: 1em; margin-right: 1em;"><img border="0" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjqiW0lwtUApE4XYAYlpE3OOItKPvggOYEdJrYF4rrLQJrCk5gdbqV5IyICFVCqf8FLuna6_Q9iF4r1NENzOtc23bOOAynuIBxDGt7sO7GMWkr8dUVrnKhaIIzaQWt8vB9bxELVaNtNKoU/s320/28122011505.jpg" width="320" /></a>Усилвателя е изграден на базата на интегрални чипове TDA7293 с модната схема за искинско HI-END звучене. Стъпалата са вързани в bridge режим 2х2 за максимална мощност при 8омов товар. Всички занем, че изкривяванията на всяко стъпало при 8ома са по малко, отколкото при 4ома.Синусоидалната мощност при пълно натоварване и 8ома е 2х160W rms и 2х320W peak power. Усилвателя е изграден на базата на интегрални чипове TDA7293 с модната схема за искинско HI-END звучене.<br />
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Стъпалата са вързани в bridge режим 2х2 за максимална мощност при 8омов товар. Всички занем, че изкривяванията на всяко стъпало при 8ома са по малко, отколкото при 4ома. Синусоидалната мощност при пълно натоварване и 8ома е 2х160W rms и 2х320W peak power. Наличен е clip индикатор на изходното ниво. Входни конектори RCA, изходни тип банан-щекер. Захранването е +/-42V 33 000uF рамо, общо 66 000uF капацитет в захранването. Трафа е около 260W - мерен е. <br />
При едновременно натоварени двата канала със синусоидален сигнал (бас тест) напрежението от 84,7V пада на 73V (от +/-42,35V до +/-36.5V). <br />
Стрелковите индикатори са вързани на изхода, като клипа светва при отклонение до 0db на стрелката(при навлизане в червения сектор на скалата). <br />
DC напрежението на изхода е 3,8mV на единия канал и 0,0mV на другия. <br />
Шум и брум отсъстват.<br />
Представям ви и едно видео за да се даде визуална представа за движението на индикаторите<br />
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<iframe width="320" height="266" class="YOUTUBE-iframe-video" data-thumbnail-src="https://i.ytimg.com/vi/BxcC5b5wQI8/0.jpg" src="https://www.youtube.com/embed/BxcC5b5wQI8?feature=player_embedded" frameborder="0" allowfullscreen></iframe></div>
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Останалото се вижда от снимките.<br />
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Сърцата на усилвателя </div>
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Поглед от вътре<br />
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Схемата на свързване</div>
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<a href="http://2.bp.blogspot.com/-zYoWCpkXEh4/TwC_opqqJ9I/AAAAAAAAAXA/aa-kUY4sbtI/s1600/tda7293_hi_end%257E0.GIF" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="202" src="http://2.bp.blogspot.com/-zYoWCpkXEh4/TwC_opqqJ9I/AAAAAAAAAXA/aa-kUY4sbtI/s320/tda7293_hi_end~0.GIF" width="320" /> </a> </div>
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А ето и един проект на базата на същите стъпала от млад DIY-ер ентусиазиран от тази публикация. </div>
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<a href="http://www.bgaudioclub.org/showthread.php?13216-TDA7293-HI-END&p=324057&viewfull=1#post324057">http://www.bgaudioclub.org/showthread.php?13216-TDA7293-HI-END&p=324057&viewfull=1#post324057</a></div>
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Lyubenhttp://www.blogger.com/profile/02937647365236694158noreply@blogger.com29tag:blogger.com,1999:blog-7549324412645018505.post-18280977040866123762011-11-10T03:02:00.000-08:002011-11-10T03:06:35.367-08:00<div style="border-bottom: medium none; border-left: medium none; border-right: medium none; border-top: medium none;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhkhq0EIX9V1Fd-ltY91RDkkm783_A35puwW-Yngtp5jJ-qOboh24nyUipIDZrOSwagZmqYHu2sMSSAG2JS2bFKsktAcuxWeNemmqZCHmTHmRjv81_4MWQCub1G2K0_51ly1jMAjeBkmt8/s1600/1.jpg" imageanchor="1" style="clear: left; cssfloat: left; float: left; margin-bottom: 1em; margin-right: 1em;"><img border="0" height="240" ida="true" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhkhq0EIX9V1Fd-ltY91RDkkm783_A35puwW-Yngtp5jJ-qOboh24nyUipIDZrOSwagZmqYHu2sMSSAG2JS2bFKsktAcuxWeNemmqZCHmTHmRjv81_4MWQCub1G2K0_51ly1jMAjeBkmt8/s320/1.jpg" width="320" /></a><span class="fullpost"> </span></div>Ето и следващия от породата QUASI amp. Захранващо напрежение +/-40V, крайни транзистори TO3 корпус. Очаквана мощност 120W/4ома. Филтриращи кондензатори 2x4700uF/63/72V KEA II, като предстои добавяне на още 2x4700uF по малки (защото няма място в кутията). Усилвателя има защита от късо, мек старт за ОТ, защита от право напрежение в изхода и моментално<br />
<a name='more'></a> изключване на колоните при отпадане на захранването. Стъпалото може да се ползва, като усилвател за СУБ-бас, като за целта има вграден активен филтър с настройка на честотата от 30Hz до 150Hz. Филтъра може да се „прескочи” и ампа да се ползва като обикновен моно усилвател, за най-различни купончета и сбирки да речем. На предния панел има индикация за POWER ON и CLIP детектор. Входните терминали са RCA, изходните CANON. <br />
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<div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiIi0-LVaaYY8jFMSf9jf4ytbS9OO-jZ6N58rYC5nva_FsUUO8HzGDFJsVQmA84_V11DHFtQnPAvcvuQN4pChcr0lb_6Dt_zF6LIfxvDRqfJmj2IeZdr3WsVlauIgJVC2fsJY8TMY5g28M/s1600/8.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="240" ida="true" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiIi0-LVaaYY8jFMSf9jf4ytbS9OO-jZ6N58rYC5nva_FsUUO8HzGDFJsVQmA84_V11DHFtQnPAvcvuQN4pChcr0lb_6Dt_zF6LIfxvDRqfJmj2IeZdr3WsVlauIgJVC2fsJY8TMY5g28M/s320/8.jpg" width="320" /></a></div>Lyubenhttp://www.blogger.com/profile/02937647365236694158noreply@blogger.com0tag:blogger.com,1999:blog-7549324412645018505.post-30439224165921136162011-11-10T02:57:00.002-08:002012-03-01T22:56:17.714-08:00ОТ проект 12" с радимекс<div style="border: medium none;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhGFXnYQl6OXyaRDFoTLka1x0wBYn39vXaqzIbrqwhaUP0I5WRf-VwC9LaDdSYfR1ykeOwjP-PUWzclmK6udxme6h1QlyAWDi3cLWYLhggJzKPmeWItbA-OWjVwFzxXDSrHyfQQXUB_X08/s1600/1.jpg" imageanchor="1" style="clear: left; float: left; margin-bottom: 1em; margin-right: 1em;"><img border="0" height="240" ida="true" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhGFXnYQl6OXyaRDFoTLka1x0wBYn39vXaqzIbrqwhaUP0I5WRf-VwC9LaDdSYfR1ykeOwjP-PUWzclmK6udxme6h1QlyAWDi3cLWYLhggJzKPmeWItbA-OWjVwFzxXDSrHyfQQXUB_X08/s320/1.jpg" width="320" /></a><span class="fullpost">Представям на вашето внимание най новия ми проект на ОТ с 12" гоорители . НЧ са </span><a href="http://radimexbg.com/product_images/LW1200.jpg" target="_blank">LW1200</a><span class="fullpost"> на радимекс.</span></div>Кутиите са с вътрешен обем около 78литра. Скосени в задната си част. Бас рефлекса е 75мм диаметър с дължина 72мм. По сметки настроен на 43Hz. ВЧ са <a href="http://megavoice-bg.com/?pid=58&product=531" target="_blank">BМH1301</a>, като им е сложена фуния от пиезо хорна, някаква китайска. Филтри има само на високите изграден от по <br />
<a name='more'></a>два кондензатора с общ капацитет 6,9uF. Честотата на срез е около 2,8kHz. По стените вътре на всякъде има вата (освен на предния панел), от тази обемната дето я слагат по завивките на олекотените одеала. Финиша е филц.<br />
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30литра затворен обем. Ползван е заден панел от СУБ на Bowers Wilkins заедно с предовете и филтрите (има доста настройки). Стъпалото е P3A променено за да работи само с NPN крайни 2x2SC5200. Трафа е 2x26VAC и усилвателя работи на +/-35V. Филтриращите кондензатори са по един 4700uF/50V на рамо. Като цяло се получи добър външен вид и звучене. БГ говорителчето VKN 09270-01 засвири доста за размерите си.<br />
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Lyubenhttp://www.blogger.com/profile/02937647365236694158noreply@blogger.com2tag:blogger.com,1999:blog-7549324412645018505.post-33828684519103667272011-10-14T03:34:00.000-07:002012-02-06T04:36:37.581-08:00P3A Black Edition 2x50W<div class="separator" style="border: medium none; clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjqDSn0cxKMWCcQcQ9w4wPvF-g3n5lOFrVmEJgwVOTHNYEqycV9TpjRCSDrWtFgVWNrcWR3HhX9FSgW-bMWISRkHCCVUQ-2Vu2h8yWgzpcfkFR-0AlVOQz-QFbB1Fuc6-RSa4perxFcg3o/s1600/06102011045.jpg" imageanchor="1" style="clear: left; float: left; margin-bottom: 1em; margin-right: 1em;"><img border="0" height="240" oda="true" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjqDSn0cxKMWCcQcQ9w4wPvF-g3n5lOFrVmEJgwVOTHNYEqycV9TpjRCSDrWtFgVWNrcWR3HhX9FSgW-bMWISRkHCCVUQ-2Vu2h8yWgzpcfkFR-0AlVOQz-QFbB1Fuc6-RSa4perxFcg3o/s320/06102011045.jpg" width="320" /></a>Представям на вашето внимание едно симпатично усилвателче P3A Black Edition. Перфектно за ползване като Desktop PC amplifier. Очаквана мощност 2x50W/4ома и 2х35W/8ома. Захранващ трансформатор 2x24VAC около 70W. Кондензатори 4x4700uF във филтриращата група. Стъпалата са по схемата на Род Елиът, всеизвестната <a class="postlink" href="http://sound.westhost.com/project3a.htm" target="_blank"><span style="color: #5493b4;">P3A</span></a>. Видео на усилвателя в действие <a href="http://vbox7.com/play:145ccc77f1" target="_blank">тук</a>. </div><div class="separator" style="border: medium none; clear: both; text-align: center;"></div><a name='more'></a>Крайни транзистори TO3 корпус захванати на масивен радиатор.<br />
<div class="separator" style="border: medium none; clear: both; text-align: center;">На предния панел на усилвателчето има стрелкови индикатри с клип индикато отдолу. В изхода се предвижда и мостов режим. Входни терминали RCA, изходни тип ципка. Бутона POWER ON/OFF е на задния панел. Минимален товар в стерео режим 4ома, в мостов 8ома.</div><div class="separator" style="border: medium none; clear: both; text-align: center;"><br />
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</div><div class="separator" style="border: medium none; clear: both; text-align: center;">night mode</div><div class="separator" style="border: medium none; clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjmNPQPg_x2MZgsoZTr9fOH9o_ZmhIFHzQuUH3K2vfkOMtQaTaibyb4RVvDzqgN340h78bj_4_MAbUd2Syn6Hwr7MT7LitWDwf-Gjb-z4uKOfFvj-6HJsmLx4xDwwsW9WwMVHObeBJHQ0k/s1600/06102011051.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="240" oda="true" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjmNPQPg_x2MZgsoZTr9fOH9o_ZmhIFHzQuUH3K2vfkOMtQaTaibyb4RVvDzqgN340h78bj_4_MAbUd2Syn6Hwr7MT7LitWDwf-Gjb-z4uKOfFvj-6HJsmLx4xDwwsW9WwMVHObeBJHQ0k/s320/06102011051.jpg" width="320" /></a></div><div class="separator" style="border: medium none; clear: both; text-align: center;"><br />
</div><div class="separator" style="border: medium none; clear: both; text-align: center;">night mode 2</div><div class="separator" style="border: medium none; clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjpyj6qjD3FMbbNKZWAqSampGK25xAP8cZnxVysuYL98VNrAWKYUVUx4Ph6T4Kj6lHa46hTRETNEfPZ76ATG9Xm9kzjWHojEHsQRpj6JOEGgEWTayeLQMawQQA4EunN6WOAWAHLgIGUYmw/s1600/06102011050.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="240" oda="true" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjpyj6qjD3FMbbNKZWAqSampGK25xAP8cZnxVysuYL98VNrAWKYUVUx4Ph6T4Kj6lHa46hTRETNEfPZ76ATG9Xm9kzjWHojEHsQRpj6JOEGgEWTayeLQMawQQA4EunN6WOAWAHLgIGUYmw/s320/06102011050.jpg" width="320" /></a></div><div class="separator" style="border: medium none; clear: both; text-align: center;"><br />
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</div><div class="separator" style="border: medium none; clear: both; text-align: center;">поглед от вътре</div><div class="separator" style="border: medium none; clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj6KYMNOVzWTnJhdE5yH13eqiLITv7crtn_48v16uYFay_RMdQJGzZTviWcMJH2oPJfBR8oyXukrpvQg6ZTAI3V1IRCUKkbrbMNYZaqUVE35mT4oR0hG7ec8AXwz_f_mv4ch5-sBWwbvi8/s1600/14102011097.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="240" oda="true" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj6KYMNOVzWTnJhdE5yH13eqiLITv7crtn_48v16uYFay_RMdQJGzZTviWcMJH2oPJfBR8oyXukrpvQg6ZTAI3V1IRCUKkbrbMNYZaqUVE35mT4oR0hG7ec8AXwz_f_mv4ch5-sBWwbvi8/s320/14102011097.jpg" width="320" /></a></div><div class="separator" style="border: medium none; clear: both; text-align: center;">схема на стъпалата</div><div class="separator" style="border: medium none; clear: both; text-align: center;"><br />
</div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh6-8pxN-4kflxS_6Le07rUQQGj-Pim4m0Ru58GbYwIQBaI9VsyaO-dQpc-tCsj2JHCmp0hop6UZpnk3S0xZhjAjcyw9XQFHzlKRdw9d-f49rkBzVbt9Ik3U94xY2jjS30TNjChx5QUWtw/s1600/P3A+original+shematic.gif" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="190" oda="true" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh6-8pxN-4kflxS_6Le07rUQQGj-Pim4m0Ru58GbYwIQBaI9VsyaO-dQpc-tCsj2JHCmp0hop6UZpnk3S0xZhjAjcyw9XQFHzlKRdw9d-f49rkBzVbt9Ik3U94xY2jjS30TNjChx5QUWtw/s320/P3A+original+shematic.gif" width="320" /></a></div><br />
<img height="72" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjpyj6qjD3FMbbNKZWAqSampGK25xAP8cZnxVysuYL98VNrAWKYUVUx4Ph6T4Kj6lHa46hTRETNEfPZ76ATG9Xm9kzjWHojEHsQRpj6JOEGgEWTayeLQMawQQA4EunN6WOAWAHLgIGUYmw/s320/06102011050.jpg" style="left: 383px; opacity: 0.3; position: absolute; top: 587px; visibility: hidden;" width="96" /> <img height="72" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjpyj6qjD3FMbbNKZWAqSampGK25xAP8cZnxVysuYL98VNrAWKYUVUx4Ph6T4Kj6lHa46hTRETNEfPZ76ATG9Xm9kzjWHojEHsQRpj6JOEGgEWTayeLQMawQQA4EunN6WOAWAHLgIGUYmw/s320/06102011050.jpg" style="left: 175px; opacity: 0.3; position: absolute; top: 841px; visibility: hidden;" width="96" />Lyubenhttp://www.blogger.com/profile/02937647365236694158noreply@blogger.com0tag:blogger.com,1999:blog-7549324412645018505.post-15503190012893453962011-08-30T04:47:00.000-07:002015-05-27T03:58:48.265-07:002.1 Really BIG POWER<div class="separator" style="border: medium none; clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEguzgChmmU3TBL1aRu8SOkxu_6eEsUXPi53YjeYl9m5z0IgS2gxpEM53mK9CB7Jo-vlRTe3cRSnitre4vZRqZFiP1E-0OLtQuM2e5T62F8qLNYcq_bxCF0PDxx49cWNYjosrd3AkFw8sE4/s1600/300820111997.jpg" imageanchor="1" style="clear: left; float: left; margin-bottom: 1em; margin-right: 1em;"><img border="0" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEguzgChmmU3TBL1aRu8SOkxu_6eEsUXPi53YjeYl9m5z0IgS2gxpEM53mK9CB7Jo-vlRTe3cRSnitre4vZRqZFiP1E-0OLtQuM2e5T62F8qLNYcq_bxCF0PDxx49cWNYjosrd3AkFw8sE4/s320/300820111997.jpg" width="320" xaa="true" /></a></div>
<span style="font-family: "Times New Roman"; font-size: 12pt;"><span style="font-family: "Times New Roman"; font-size: 12pt;"><span style="font-family: "Times New Roman"; font-size: 12pt;">Представям на вашето внимание един 3 канален усивател предназначен да захрани 2 топа и 2 СУБ-баси. Усилвателя е изграден на бзата на интегрални чипове TDA7294 - 2бр. и схема EXCELA v1 с активен кросовър пропускащ до 100Hz -3db. 2 захранващи напрежения +/-33V и +/-43V. Две филтърни групи от по 10 000uF в рамо, общо 40 000uF филтрация. </span></span></span><br />
<a name='more'></a>Два трафа с маркирана мощност от по 250VA (могат и повече :)). Очакваната синусоидална мощност е 2x70W/4ома за топовете - стерео и 1x350W/2ома за СУБ-а. Музикалната (пикова) е 2х100W + 400W. Усилвателя притежава термична защита, защита от късо на изхода, активно охлаждане, два солидни радиатора тип пеперуда с дължина 300мм, volume control - отделен за топовете и баса. Входове RCA, изходи тип чипка. <br />
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изглед отзад</div>
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стъпалото ексела</div>
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крайни транзистори KD503 ;)</div>
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вътрешен изглед</div>
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схеми на стъпалата</div>
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Lyubenhttp://www.blogger.com/profile/02937647365236694158noreply@blogger.com0tag:blogger.com,1999:blog-7549324412645018505.post-2475717831897556332011-08-11T06:28:00.000-07:002011-08-11T06:28:44.680-07:002xTDA7294 2x90W music power - Проект за един ден<div class="separator" style="border-bottom: medium none; border-left: medium none; border-right: medium none; border-top: medium none; clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjeiJVV409T5opYUdKrpiih4TNmGxD3hMDYrLopPY7YE3Sp_Voe5YpyG-kLRoW1QKCaix13BHPJWSKKMYYhmx9g4wCpQHJ3dE65hiCbY1oev8iFjXU2BbJZ3syjc12hV7FCqE0CVc50hNM/s1600/01.jpg" imageanchor="1" style="clear: left; cssfloat: left; float: left; margin-bottom: 1em; margin-right: 1em;"><img border="0" height="240" naa="true" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjeiJVV409T5opYUdKrpiih4TNmGxD3hMDYrLopPY7YE3Sp_Voe5YpyG-kLRoW1QKCaix13BHPJWSKKMYYhmx9g4wCpQHJ3dE65hiCbY1oev8iFjXU2BbJZ3syjc12hV7FCqE0CVc50hNM/s320/01.jpg" width="320" /></a></div><div class="MsoNormal" style="border-bottom: medium none; border-left: medium none; border-right: medium none; border-top: medium none; margin: 0cm 0cm 0pt;"><span class="postbody1"><span style="font-family: Verdana; font-size: 10pt;">Усилвателя е изграден на базата на интегрален чип TDA7294. Захранващи напрежения 2x19VAC, приблизителна синусоидална мощност 2x65W, музикална 2x90W. Капацитетите в изправителя са 2x4700uF/50V LG. Притежава - volume control, защита от късо на изхода, термична защита, пасивно охлаждане, копче on/off, изходни терминали тип щипка, входни RCA. </span></span><span style="font-family: Verdana; font-size: 10pt;"><br />
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<a name='more'></a><br />
<span style="font-family: Verdana; font-size: 10pt;"><span class="postbody1">Както името посказва ампчето беше направено за 1 ден с много желание и старание за да радва УХОТО и окото разбира се.</span></span></div><div class="MsoNormal" style="border-bottom: medium none; border-left: medium none; border-right: medium none; border-top: medium none; margin: 0cm 0cm 0pt;"><span style="font-family: Verdana; font-size: 10pt;"><span class="postbody1">Усилвателчето е малко симпатично и притежава достатъчно мощ за озвучаване на сБирки с приятна музика и приятна компания.</span></span></div><div class="separator" style="border-bottom: medium none; border-left: medium none; border-right: medium none; border-top: medium none; clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh53cNSbr7XLzUcob7cs-QNStj-O1glGyt5mrBqNZrzZWf3jTXCv7KRGNUzp2oRqhDj0B4SvAmS2BbOAnHIS_JqRmIDlxjHo1Uzy-rYhsEXtvG8W4Pm6rXZVMoVvVbgwe7Xsz1XeXagLMg/s1600/02.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="240" naa="true" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh53cNSbr7XLzUcob7cs-QNStj-O1glGyt5mrBqNZrzZWf3jTXCv7KRGNUzp2oRqhDj0B4SvAmS2BbOAnHIS_JqRmIDlxjHo1Uzy-rYhsEXtvG8W4Pm6rXZVMoVvVbgwe7Xsz1XeXagLMg/s320/02.jpg" width="320" /></a></div><div class="separator" style="border-bottom: medium none; border-left: medium none; border-right: medium none; border-top: medium none; clear: both; text-align: center;"><br />
</div><div class="separator" style="border-bottom: medium none; border-left: medium none; border-right: medium none; border-top: medium none; clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjMe89IKfHqCOy4ATEa1Ls62uAIBKwHC-awU5fOoNxvA7cb8-d1beGZ0T2qkDrTItkssexBcb2RxmKqIcqwQkWOSVwdvJB_XMOfC2g1sPSApgA3UdmSE4dLvKGfJFmhCqpBrqMLU1AlC0A/s1600/03.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="240" naa="true" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjMe89IKfHqCOy4ATEa1Ls62uAIBKwHC-awU5fOoNxvA7cb8-d1beGZ0T2qkDrTItkssexBcb2RxmKqIcqwQkWOSVwdvJB_XMOfC2g1sPSApgA3UdmSE4dLvKGfJFmhCqpBrqMLU1AlC0A/s320/03.jpg" width="320" /></a><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEijUjBw4HHrcnjZSUOfRsJFXY38-vX6vhA_EGLMDEe_8jbRjuAPtUaUCHleiPzYMz4wRG2Oc1DsPTyLAKTeJJ1xhW6v6Z3b9Lu_IQqdM9CbmCjI45jbpYph2vGGbnb8jAIW57THc9gGbw8/s1600/04.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="240" naa="true" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEijUjBw4HHrcnjZSUOfRsJFXY38-vX6vhA_EGLMDEe_8jbRjuAPtUaUCHleiPzYMz4wRG2Oc1DsPTyLAKTeJJ1xhW6v6Z3b9Lu_IQqdM9CbmCjI45jbpYph2vGGbnb8jAIW57THc9gGbw8/s320/04.jpg" width="320" /></a></div><div class="separator" style="border-bottom: medium none; border-left: medium none; border-right: medium none; border-top: medium none; clear: both; text-align: center;">поглед от вътре</div><div class="separator" style="border-bottom: medium none; border-left: medium none; border-right: medium none; border-top: medium none; clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhkeDSEmttvkx_eUi1JauthcrWHEf_E5wsYB7Yr3ym_7rGlEhoDgVjfPxcPhlVGUbsv6b-EzXLGo-LkhdNuw7g49J3KfRTW_zrkYw1t_60tnCFZm3uTejVa8GNh8kcBBNQYlk_hJ9xhrFo/s1600/05.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="240" naa="true" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhkeDSEmttvkx_eUi1JauthcrWHEf_E5wsYB7Yr3ym_7rGlEhoDgVjfPxcPhlVGUbsv6b-EzXLGo-LkhdNuw7g49J3KfRTW_zrkYw1t_60tnCFZm3uTejVa8GNh8kcBBNQYlk_hJ9xhrFo/s320/05.jpg" width="320" /></a></div>Lyubenhttp://www.blogger.com/profile/02937647365236694158noreply@blogger.com1tag:blogger.com,1999:blog-7549324412645018505.post-2003810905180469812011-08-03T12:56:00.000-07:002011-08-03T12:57:11.325-07:00QUASI amp 2x180W peak power<div class="separator" style="border-bottom: medium none; border-left: medium none; border-right: medium none; border-top: medium none; clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh-TwJu53Kg4DBFnfQXSmdj9G2QWRj63yu0lA8iVKUgmjBezBsj4T2LdrvILm7C74eLZMbXXHVJGDZvVDOj95BG_-g3sJghwxugPZa47EmeUcQf95ahvCJ9XDC-bRUlW0fBnvGGklv7-iY/s1600/180720111870.jpg" imageanchor="1" style="clear: left; cssfloat: left; float: left; margin-bottom: 1em; margin-right: 1em;"><img border="0" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh-TwJu53Kg4DBFnfQXSmdj9G2QWRj63yu0lA8iVKUgmjBezBsj4T2LdrvILm7C74eLZMbXXHVJGDZvVDOj95BG_-g3sJghwxugPZa47EmeUcQf95ahvCJ9XDC-bRUlW0fBnvGGklv7-iY/s320/180720111870.jpg" t$="true" width="320" /></a></div><div style="border-bottom: medium none; border-left: medium none; border-right: medium none; border-top: medium none;">Нискочестотен усилвател изграден на базата на стъпала по схема работеща в клас Б с идеята за отделяне на повече мощност с малка загуба на топлина и високо КПД. Захранването е изпълнено с трансформатор осигуряващ +/-53V изправено филтрирано напрежение. Капацитета на филтерната група е 4700uF на рамо. Усилвателя е с профи визия. Притежава Защита на ОТ, отожен старт на ОТ, мигновенно изглючване на колоните <br />
<a name='more'></a>при отпадане на захранването, защита от късо на изхода, активно охлаждане с вентилатор 80мм и регулация на оборотите според температурата, сигнал детектор, клип детектор, volume control. Входове RCA, изходи тип "CANON". Синусоидална мощност 2x140W/4ом и 2x180W/4ом пикова.</div><div class="separator" style="border-bottom: medium none; border-left: medium none; border-right: medium none; border-top: medium none; clear: both; text-align: center;">задна страна</div><div class="separator" style="border-bottom: medium none; border-left: medium none; border-right: medium none; border-top: medium none; clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjPylxTEi3l-0CDFf0B_V8dHAjbX4dmgvHG2IHifsK52CjOpZewrqcV3LDE6usLe82oprFwdJLAbc2SCqifSGZMA9nMwApWqKOjIFRn2PE5aWjdFZKNSb5vV8eUfedvIqt7t2vCa0LBTZg/s1600/180720111867.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjPylxTEi3l-0CDFf0B_V8dHAjbX4dmgvHG2IHifsK52CjOpZewrqcV3LDE6usLe82oprFwdJLAbc2SCqifSGZMA9nMwApWqKOjIFRn2PE5aWjdFZKNSb5vV8eUfedvIqt7t2vCa0LBTZg/s320/180720111867.jpg" t$="true" width="320" /></a></div><div class="separator" style="border-bottom: medium none; border-left: medium none; border-right: medium none; border-top: medium none; clear: both; text-align: center;">лява задна страна</div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg8QXc60eaogGTSGJhIDXqiNapOrkQ_9p_WlMAPgF8V_Uc_C9VhkdGYnRXzWOIkEJSIxqpWwSUvX45DXP2rcUrNug5RYmn4ocurb5miJ1QyhL-BmX3oKsRY9RkGrC9rpoDwqVRLQ0zrZD8/s1600/180720111868.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg8QXc60eaogGTSGJhIDXqiNapOrkQ_9p_WlMAPgF8V_Uc_C9VhkdGYnRXzWOIkEJSIxqpWwSUvX45DXP2rcUrNug5RYmn4ocurb5miJ1QyhL-BmX3oKsRY9RkGrC9rpoDwqVRLQ0zrZD8/s320/180720111868.jpg" t$="true" width="320" /></a></div><div class="separator" style="clear: both; text-align: center;">дясна задна страна</div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgf2WfNRgcmZiwYDn6YFuTMrjGHzRm7NxS2TKphWcBaAzqK07wDPb3fMgBLDbr_lbp8e-eSWNmN2tQYH_5pFu2ajF182ZUqPQM28zATElNNodZiVSX7iD1Sgicdgm40pLmWSAGeilM5w4w/s1600/180720111869.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgf2WfNRgcmZiwYDn6YFuTMrjGHzRm7NxS2TKphWcBaAzqK07wDPb3fMgBLDbr_lbp8e-eSWNmN2tQYH_5pFu2ajF182ZUqPQM28zATElNNodZiVSX7iD1Sgicdgm40pLmWSAGeilM5w4w/s320/180720111869.jpg" t$="true" width="320" /></a></div><div class="separator" style="clear: both; text-align: center;">QUASI стъпалото</div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiYQcXNQsWWSx1g7QcXFom6cKM2jbTP9TRMWr82XuLpggM6TBamr72yQg2oJFmY5FI1GZ7IhQdA05i_uOe_FnqBruv9rihPrbftFM6QMHop30MQx0ri6ocE_n70btvwvv-r2MoA00WFJJQ/s1600/1.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiYQcXNQsWWSx1g7QcXFom6cKM2jbTP9TRMWr82XuLpggM6TBamr72yQg2oJFmY5FI1GZ7IhQdA05i_uOe_FnqBruv9rihPrbftFM6QMHop30MQx0ri6ocE_n70btvwvv-r2MoA00WFJJQ/s320/1.jpg" t$="true" width="320" /></a></div><div class="separator" style="clear: both; text-align: center;">крайните транзистори</div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiuV5_dZkrOLewUTI0XwC2GVME7jovOmvhzvAcIRT4LLh2326_hIwEi7duARMoybF3qGPlarKc7sUVKcWIRDhVr2AUL-LhbhptNpWsDBhh_2SUxf18hgbccklNPB02nh_6utbB_BEXHHWk/s1600/6.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiuV5_dZkrOLewUTI0XwC2GVME7jovOmvhzvAcIRT4LLh2326_hIwEi7duARMoybF3qGPlarKc7sUVKcWIRDhVr2AUL-LhbhptNpWsDBhh_2SUxf18hgbccklNPB02nh_6utbB_BEXHHWk/s320/6.jpg" t$="true" width="320" /></a></div><div class="separator" style="clear: both; text-align: center;">вътре</div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhTuAD8r54XlufhHMaqADPwG3W6gTStT1_YEpRNEWGRTuXO7vry0teSJQULedMaxTvdlOWL7T8N-HtIsjyGLdmLzbj2vw_h6J9Q6LfujKbt-xEnUuD5Dug8yTDRuXeQ_AD5zcnJiQGHYGs/s1600/8.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhTuAD8r54XlufhHMaqADPwG3W6gTStT1_YEpRNEWGRTuXO7vry0teSJQULedMaxTvdlOWL7T8N-HtIsjyGLdmLzbj2vw_h6J9Q6LfujKbt-xEnUuD5Dug8yTDRuXeQ_AD5zcnJiQGHYGs/s320/8.jpg" t$="true" width="320" /></a></div><div class="separator" style="clear: both; text-align: center;">schematic</div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhzilv5Rq7o-stM0iFxUfnqBFkrsAUJbnb5TsOseb-21yYRMySimgl50nB_UnG11DMzqUlY6fdm0p2blUnBR2rwR-DsiH9welL3hdOnZNQFOD0KtLWA_6Tw1AdCzRYgIlr-OZbqky9S6Yo/s1600/shema_gotov_amp.bmp" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="144" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhzilv5Rq7o-stM0iFxUfnqBFkrsAUJbnb5TsOseb-21yYRMySimgl50nB_UnG11DMzqUlY6fdm0p2blUnBR2rwR-DsiH9welL3hdOnZNQFOD0KtLWA_6Tw1AdCzRYgIlr-OZbqky9S6Yo/s320/shema_gotov_amp.bmp" t$="true" width="320" /></a></div><div class="separator" style="border-bottom: medium none; 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</div>Lyubenhttp://www.blogger.com/profile/02937647365236694158noreply@blogger.com2tag:blogger.com,1999:blog-7549324412645018505.post-5053290606498210122011-06-04T08:44:00.000-07:002011-06-04T10:04:41.782-07:002x25W Retro Style<div class="separator" style="border-bottom: medium none; border-left: medium none; border-right: medium none; border-top: medium none; clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiqmpg6rywF4JOmgKc_K4mTSi04IC0gih9CW0JvDs_mI35x3b4U3gkEyZjCC80zJBBOdp8J3Yj1DS_kS3NMmAzCxwFUQnVwJTersjT1nUIF6FDaxNuIkC_5de_GZWA2XbrqK4n7hsZmTaA/s1600/040620111742.jpg" imageanchor="1" style="clear: left; cssfloat: left; float: left; margin-bottom: 1em; margin-right: 1em;"><img border="0" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiqmpg6rywF4JOmgKc_K4mTSi04IC0gih9CW0JvDs_mI35x3b4U3gkEyZjCC80zJBBOdp8J3Yj1DS_kS3NMmAzCxwFUQnVwJTersjT1nUIF6FDaxNuIkC_5de_GZWA2XbrqK4n7hsZmTaA/s320/040620111742.jpg" t8="true" width="320" /></a></div><div style="border-bottom: medium none; border-left: medium none; border-right: medium none; border-top: medium none;"> Симпатично усилвателче изградено на базата на интегрална схема TDA1554Q Музикална мощност 2x25W. Захранващия трансформатор е 13V/70VA и е в състояние да отдаде до 5,3А в номинален режим, което се оказа предостатъчно за този чип. Изходни терминали - аудио жак 6,3мм, RCA входове. Ампа разполага с защита от късо на изхода, ниво индикатор, volume контрол и активно охлаждане. <br />
<a name='more'></a></div><div class="separator" style="clear: both; text-align: center;">поглед отзад</div><div class="separator" style="border-bottom: medium none; border-left: medium none; border-right: medium none; border-top: medium none; clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgxPXHajXPBEKwECi2IyBHPvB1YXj6GAieYPQ2cvFl_LXnpdk9q_NiFirB5KFSwwUw0RBZx5UzoOLz4flQl50-CHfQ03P3golZyJ-XxG79PTj0-x3LOKAFL9gtivE4DYU7lZPRJ0uKkeuE/s1600/040620111743.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgxPXHajXPBEKwECi2IyBHPvB1YXj6GAieYPQ2cvFl_LXnpdk9q_NiFirB5KFSwwUw0RBZx5UzoOLz4flQl50-CHfQ03P3golZyJ-XxG79PTj0-x3LOKAFL9gtivE4DYU7lZPRJ0uKkeuE/s320/040620111743.jpg" t8="true" width="320" /></a></div><div class="separator" style="border-bottom: medium none; border-left: medium none; border-right: medium none; border-top: medium none; clear: both; text-align: center;"><br />
</div><div class="separator" style="border-bottom: medium none; border-left: medium none; border-right: medium none; border-top: medium none; clear: both; text-align: center;">поглед отпред</div><div class="separator" style="border-bottom: medium none; border-left: medium none; border-right: medium none; border-top: medium none; clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjpmKb4ZwD9908NoPxYy-rsLdKuafS4G6zhp2PM3gwQ0X2JKw6bWHekADJB2BIfv78dtbnMlqwTEEYKTt0Cix_R6f-UQCXjBKxWWD1nuvqE0J3H7D5PVHe51bY5ckhPlt2kp2tqp9ajx40/s1600/030620111727.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjpmKb4ZwD9908NoPxYy-rsLdKuafS4G6zhp2PM3gwQ0X2JKw6bWHekADJB2BIfv78dtbnMlqwTEEYKTt0Cix_R6f-UQCXjBKxWWD1nuvqE0J3H7D5PVHe51bY5ckhPlt2kp2tqp9ajx40/s320/030620111727.jpg" t8="true" width="320" /></a></div><div class="separator" style="clear: both; text-align: center;"><br />
</div><div class="separator" style="clear: both; text-align: center;">от вътре</div><div class="separator" style="border-bottom: medium none; border-left: medium none; border-right: medium none; border-top: medium none; clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjgitcqcAspkEIS9YceTuRszyCbnMaZXdnvuevMhgcX5nhf22Bm1mcl6U4nf3YTPdJyv-KYtpGhpXS8VNg6JNtTKmYeYHy9gAkXg7myBjWODxWwybUV31xaPUrDYcOw-0BgfQo98Q8lrrc/s1600/040620111741.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjgitcqcAspkEIS9YceTuRszyCbnMaZXdnvuevMhgcX5nhf22Bm1mcl6U4nf3YTPdJyv-KYtpGhpXS8VNg6JNtTKmYeYHy9gAkXg7myBjWODxWwybUV31xaPUrDYcOw-0BgfQo98Q8lrrc/s320/040620111741.jpg" t8="true" width="320" /></a></div><div style="border-bottom: medium none; border-left: medium none; border-right: medium none; border-top: medium none;"><br />
</div><div class="separator" style="border-bottom: medium none; border-left: medium none; border-right: medium none; border-top: medium none; clear: both; text-align: center;">принципна схема</div><div class="separator" style="border-bottom: medium none; border-left: medium none; border-right: medium none; border-top: medium none; clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjZptRDfZxG1N394h-bWQoHAa3rUNc6cldw3EDvNEurDPb3MYPmwqxHSr51P-R3UmBYrtxzHL9VUIvDLuVgViApq2NljZdnDnXSVNly82Po5_-spHFJNahnEAA-Cte2ZERFq0PbnO25Crc/s1600/schematic.PNG" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="320" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjZptRDfZxG1N394h-bWQoHAa3rUNc6cldw3EDvNEurDPb3MYPmwqxHSr51P-R3UmBYrtxzHL9VUIvDLuVgViApq2NljZdnDnXSVNly82Po5_-spHFJNahnEAA-Cte2ZERFq0PbnO25Crc/s320/schematic.PNG" t8="true" width="263" /></a></div><div style="border-bottom: medium none; border-left: medium none; border-right: medium none; border-top: medium none;"><br />
</div><div style="border-bottom: medium none; border-left: medium none; border-right: medium none; border-top: medium none;"><br />
</div>Lyubenhttp://www.blogger.com/profile/02937647365236694158noreply@blogger.com3tag:blogger.com,1999:blog-7549324412645018505.post-49662052854057179572011-03-06T23:14:00.000-08:002011-03-06T23:18:39.644-08:002x200W нов мод за УМ-100<div class="separator" style="border-bottom: medium none; border-left: medium none; border-right: medium none; border-top: medium none; clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg3v3Ea0Y2jikYU7bbRgd8MuAsF_HTAjbew9VbfP5m9B7TFjN9ETIXdx8NCSEmj5XbOZ_GvMjDXSbaDEvTy8b4LBAxMKbz1E9ONYIG0mU3iSNDmHH39dKkPRuzbJ8ev0NGSGCdeIZUzvO0/s1600/19022011998.jpg" imageanchor="1" style="clear: left; cssfloat: left; float: left; margin-bottom: 1em; margin-right: 1em;"><img border="0" height="240" q6="true" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg3v3Ea0Y2jikYU7bbRgd8MuAsF_HTAjbew9VbfP5m9B7TFjN9ETIXdx8NCSEmj5XbOZ_GvMjDXSbaDEvTy8b4LBAxMKbz1E9ONYIG0mU3iSNDmHH39dKkPRuzbJ8ev0NGSGCdeIZUzvO0/s320/19022011998.jpg" width="320" /></a></div>Проекта представлява мод на модерния за времето си УМ-100, който дойде в насипно състояние.<br />
Усилвателя е изграден на базата мостово свързване на популярната схема на Rod Elliott P3A. Изпълнен е със 2 мощни трансформатора 2х28V 210VA. <br />
Филтърна група от 4х10000uF, два греца две филтърни групи.<br />
RCA входове, изходни букси.<br />
Налична защита от късо в изхода.<br />
Пасивно охлаждане със солидни радиатори.<br />
<a name='more'></a><br />
LED индикатори на ниво.<br />
Синусоидална мощност 2х206W при 8ома.<br />
Възможност за работа само със 2 от стъпалата за 4ома товар и около 100W на канал.<br />
Наличен volume control.<br />
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снимка на стъпалото във състояние преди мод-а<br />
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<div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiZPiK9yO0rNoOCrf8b54V5BfCwvFRw2_bgm17_ogYLwCB2912W4n48laQqGbUqgBTIREwBfdxCO2bkxuc87ckDcqSidmXroRnA2axKlhHyZuPwDweK64JtQCZwASEwsuAfvHk4eq2_FiE/s1600/before.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="240" q6="true" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiZPiK9yO0rNoOCrf8b54V5BfCwvFRw2_bgm17_ogYLwCB2912W4n48laQqGbUqgBTIREwBfdxCO2bkxuc87ckDcqSidmXroRnA2axKlhHyZuPwDweK64JtQCZwASEwsuAfvHk4eq2_FiE/s320/before.jpg" width="320" /></a></div><div class="separator" style="clear: both; text-align: center;"><br />
</div>след интервенциите<br />
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сърцето на всяко стъпало<br />
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схема на усилвателя<br />
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<div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh9-aG3l7TfF9tu25x8Ws2FN8l8SBjj16KcqBXTqTd3RrqVyRZY9m6rCbq2v-YlrDZH4qBzf72Y7XkmgeJWW4C4AEcxYDd3NJcrZt7uXVoEAWZfn6dDAvM0mYUXFRhFf-42yzezppETs-I/s1600/P3A+update+shematic+2+zebo.PNG" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="173" q6="true" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh9-aG3l7TfF9tu25x8Ws2FN8l8SBjj16KcqBXTqTd3RrqVyRZY9m6rCbq2v-YlrDZH4qBzf72Y7XkmgeJWW4C4AEcxYDd3NJcrZt7uXVoEAWZfn6dDAvM0mYUXFRhFf-42yzezppETs-I/s320/P3A+update+shematic+2+zebo.PNG" width="320" /></a></div>Lyubenhttp://www.blogger.com/profile/02937647365236694158noreply@blogger.com2tag:blogger.com,1999:blog-7549324412645018505.post-43328078872397000612011-02-13T04:34:00.000-08:002015-06-13T13:57:14.613-07:00Проект Excela Amplifier<div class="separator" style="border-bottom: medium none; border-left: medium none; border-right: medium none; border-top: medium none; clear: both; text-align: center;">
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Представям на вашето внимание висококачествено стъпало по легендарната схема от DIY Audio Club Bulgaria - Excela.<br />
Изпълнено със мощен тороидален трансформатор 2х35V 350VA. Филтърна група от 4х15000uF DAEWOO. <br />
Налична защита за ОТ, отложен старт, мигновенно изключване на колоните след спиране на усилвателя, защита от късо на изхода. Термична защита. Clip индикация.<br />
Входни терминали - RCA non balanced<br />
Изходни терминали - Golded platinum<br />
Volume Control,<br />
<a name='more'></a><br />
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<table border="0" cellpadding="0" cellspacing="0" style="border-collapse: collapse; width: 412px;">
<colgroup><col style="mso-width-alt: 8192; mso-width-source: userset; width: 168pt;" width="224"></col>
<col style="mso-width-alt: 6875; mso-width-source: userset; width: 141pt;" width="188"></col>
</colgroup><tbody>
<tr height="20" style="height: 15.0pt;">
<td class="xl64" colspan="2" height="20" style="height: 15.0pt; width: 309pt;" width="412">Характеристики
/ Specifications</td>
</tr>
<tr height="20" style="height: 15.0pt;">
<td class="xl65" height="20" style="border-top: none; height: 15.0pt;"></td>
<td class="xl64" style="border-left: none; border-top: none;"></td>
</tr>
<tr height="20" style="height: 15.0pt;">
<td class="xl66" height="20" style="border-top: none; height: 15.0pt;">Input
sensitivity:</td>
<td class="xl67" style="border-left: none; border-top: none;">1.00 Vpp</td>
</tr>
<tr height="20" style="height: 15.0pt;">
<td class="xl66" height="20" style="border-top: none; height: 15.0pt;">Input
impedance:</td>
<td class="xl67" style="border-left: none; border-top: none;">10k<span class="font5">Ω</span></td>
</tr>
<tr height="20" style="height: 15.0pt;">
<td class="xl68" height="20" style="border-top: none; height: 15.0pt;">Voltage gain:</td>
<td class="xl67" style="border-left: none; border-top: none;"> +34dB</td>
</tr>
<tr height="20" style="height: 15.0pt;">
<td class="xl66" height="20" style="border-top: none; height: 15.0pt;">Peak power
output:</td>
<td class="xl67" style="border-left: none; border-top: none;">280W/4Ω, 150W/8Ω</td>
</tr>
<tr height="20" style="height: 15.0pt;">
<td class="xl66" height="20" style="border-top: none; height: 15.0pt;">Peak output
voltage:</td>
<td class="xl67" style="border-left: none; border-top: none;">36VAC, <span class="font5">±</span><span class="font6">50Vpp</span></td>
</tr>
<tr height="20" style="height: 15.0pt;">
<td class="xl66" height="20" style="border-top: none; height: 15.0pt;">Peak output
current:</td>
<td class="xl67" style="border-left: none; border-top: none;">17A</td>
</tr>
<tr height="20" style="height: 15.0pt;">
<td class="xl66" height="20" style="border-top: none; height: 15.0pt;">Power output 8
ohm, sine wave, rms</td>
<td class="xl67" style="border-left: none; border-top: none;">120W</td>
</tr>
<tr height="20" style="height: 15.0pt;">
<td class="xl66" height="20" style="border-top: none; height: 15.0pt;">Power output 4
ohm, sine wave, rms</td>
<td class="xl67" style="border-left: none; border-top: none;">200W</td>
</tr>
<tr height="20" style="height: 15.0pt;">
<td class="xl66" height="20" style="border-top: none; height: 15.0pt;">Frequency
range: -0.5dB</td>
<td class="xl69" style="border-left: none; border-top: none;">1Hz - 200kHz </td>
</tr>
<tr height="20" style="height: 15.0pt;">
<td class="xl66" height="20" style="border-top: none; height: 15.0pt;">Full-power
bandwidth:</td>
<td class="xl67" style="border-left: none; border-top: none;">10Hz - 50kHz</td>
</tr>
<tr height="20" style="height: 15.0pt;">
<td class="xl66" height="20" style="border-top: none; height: 15.0pt;">Minimum rated
load:</td>
<td class="xl67" style="border-left: none; border-top: none;">4<span class="font5">Ω</span></td>
</tr>
<tr height="20" style="height: 15.0pt;">
<td class="xl66" height="20" style="border-top: none; height: 15.0pt;">Damping
factor:</td>
<td class="xl67" style="border-left: none; border-top: none;">> 1000</td>
</tr>
<tr height="20" style="height: 15.0pt;">
<td class="xl66" height="20" style="border-top: none; height: 15.0pt;">Output noise:</td>
<td class="xl67" style="border-left: none; border-top: none;">50uVrms</td>
</tr>
<tr height="20" style="height: 15.0pt;">
<td class="xl66" height="20" style="border-top: none; height: 15.0pt;">Dynamic range:</td>
<td class="xl67" style="border-left: none; border-top: none;">116dB linear</td>
</tr>
<tr height="20" style="height: 15.0pt;">
<td class="xl66" height="20" style="border-top: none; height: 15.0pt;">THD+N:</td>
<td class="xl70" style="border-left: none; border-top: none;">< -92dB (0.0025%)</td>
</tr>
<tr height="20" style="height: 15.0pt;">
<td class="xl66" height="20" style="border-top: none; height: 15.0pt;">Mains voltage:</td>
<td class="xl67" style="border-left: none; border-top: none;">230VAC/50Hz</td>
</tr>
<tr height="20" style="height: 15.0pt;">
<td class="xl66" height="20" style="border-top: none; height: 15.0pt;">Power draw:</td>
<td class="xl67" style="border-left: none; border-top: none;">< 10W Idling<!--10w--><!--10w--><!--10w--></td></tr>
<tr height="20" style="height: 15.0pt;">
<td class="xl66" height="20" style="border-top: none; height: 15.0pt;">Max current
draw:</td>
<td class="xl67" style="border-left: none; border-top: none;">< 2A, 230VAC<!--2a--><!--2a--><!--2a--></td></tr>
<tr height="20" style="height: 15.0pt;">
<td class="xl66" height="20" style="border-top: none; height: 15.0pt;">Inputs:</td>
<td class="xl70" style="border-left: none; border-top: none;">RCA unbalanced</td>
</tr>
<tr height="20" style="height: 15.0pt;">
<td class="xl66" height="20" style="border-top: none; height: 15.0pt;">Dimensions:</td>
<td class="xl67" style="border-left: none; border-top: none;">340(w) x 290(h) x
85(d), mm</td>
</tr>
<tr height="20" style="height: 15.0pt;">
<td class="xl66" height="20" style="border-top: none; height: 15.0pt;">Weight:</td>
<td class="xl67" style="border-left: none; border-top: none;">-</td>
</tr>
</tbody></table>
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Снимки:<br />
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Поглед под капака</div>
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Заедно с останалите усилватели за лично ползване </div>
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(<a href="http://lyuben-diyprojects.blogspot.com/2011/02/tda7294-bridge.html" style="font-family: Tahoma, Calibri, Verdana, Geneva, sans-serif; font-size: 13px; text-align: start;" target="_blank">TDA7294 bridged от ляво</a>, <a href="http://lyuben-diyprojects.blogspot.com/2011/02/excela-amplifier-2x230w.html" style="font-family: Tahoma, Calibri, Verdana, Geneva, sans-serif; font-size: 13px; text-align: start;" target="_blank">EXCELA по средата</a>, <a href="http://lyuben-diyprojects.blogspot.com/2012/01/4xtda7293-2x160w-hi-end-amplifier.html" style="font-family: Tahoma, Calibri, Verdana, Geneva, sans-serif; font-size: 13px; text-align: start;" target="_blank">TDA7293 bridged от дясно</a>)</div>
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Схема на всеки от каналите</div>
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<span class="fullpost"></span>Lyubenhttp://www.blogger.com/profile/02937647365236694158noreply@blogger.com13