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ELFORUM - Forumul electronistilor

,,Brum'' in difuzor


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Salut.Am facut un sistem de 2 boxe si am o problema:in difuzoare se aude un brum, chiar daca nu am semnal audio.Transformatorul meu are 2 infasurari secundare.Una alimenteaza amplificatorul, iar una corectorul de tonuri.Am incercat sa mai pun un condensator de filtraj pe filtrajul corectorului(acum am unul de 2200 si unul de 4700), iar dupa ce am facut asta brumul nu s-a mai auzit atat de tare(adica brumul a scazut la jumate), insa tot se aude.Daca adaug si mai mult filtraj tot degeaba.Am incercat sa scot afara intrarile din amplificator(adica firele care vin din corector in amplificator), iar dupa aceea brumul a incetat.Stiti care este cauza?Multumesc.

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