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Zesilovač 5W s MBA810

 

Zesilovač 5W můžete vymontovat ze staré televize zn. Tesla, kterou najdete někde na skládce či v příkopě.

Doporučuji vyměnit všechny kondenzátory, hlavně "hovňáky", ty časem popraskají a ztrácí kapacitu.

 

 

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Napájecí napětí +14V se přivede na 5, 4minus.

Vstupní se přivede na 6, 7 - 6 vstup, 7 stínění

Reproduktor (4ohmy) na 2, 3



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U novějších televizí je tento modul doplněn o zvukový MF zesilovač+demodulátor já ho tam mam vyletovanej, ale klidně ho tam můžete nechat, stejně se nevyužije. Tyto moduly majÍ jednu nevýhodu, musí se tam přidat ještě kondenzátor 100 - 500uF a odpor 56 - 68ohm



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Pohled ze strany spojů.



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Schéma zesilovače





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Diagram závislosti výkonu zesilovače na napájecím napětí.



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Rozměrový náčrtek MBA 810


Nedávno sem si chtěl vyrobit do školy malel zesilovač s rapráčkam naposlouchání mp3, na přestávky jen tak do lavice. Našel sem doma reprobedýnku z auta, je to 4ohm by oko tak 3W-4W. do bedýnky sem udělal páječkou díru a přišrouboval potenciometr, kterej se válel venku v dílně na parapetu :-) Modul zesilovače s MBA810DS vyndanej z televize Tesla sem s indikátorem vybuzení přilepil silikonem na takovej kus lisovanýho papíru, nevim jak se to jmenuje. Ještě sem dal ochranou diodu k napájení aby se zesilovač nepřepóloval. Složil dvě, až tři plochý baterky do série a jelo se :-) Ve škole sem byl spokojen, na dvě plochý baterky v sérii cca 9V-0,7V(dioda) to hrálo perfektně, celá sestava přehlušila třídu tak aby se to dalo poslouchat :-) pak mě napadlo pouštět z mp3 signál 17kHz a dělá to takovej hnusně vysokej zvuk a srát tim učitele :-)


ještě pár fotek


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Celá sestava


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Ze zadu


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Baterky v sérii


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Indikátor vybuzení


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A plnej knedlik :-)


 

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