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ELFORUM - Forumul electronistilor

Problema hiss si ecranare amplituner


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Se da un amplituner stereo sony (str-de135, finale pe tranzistoare). Am doua chestii care ma deranjeaza un pic la el:

 

- are hiss constant (nu e influentat de volum sau sursa), slab dar perceptibil din cauza ca boxele sint pe birou la jumate de metru de urechile mele

 

- sta chiar linga birou pe partea dreapta si prinde zgomot de la celular (cind e activitate pe radio) - nu prea am unde sa-l mut, poate cu 30cm mai departe de mine daca fac un pic de "defragmentare"

 

Carcasa e metalica; cablul de alimetare nu e ecranat dar posibil sa primeasca pamintare prin masa pe ruta pc -> dac

 

Se poate face ceva (barem la prima parte)?

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