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ELFORUM - Forumul electronistilor

Rezistenta intrare amplificator


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Salutare, momentan lucrez la un miniproiect - 1.amplificator cu LM3886 si am o nedumerire. Schema dupa care-l realizez are pe partea de intrare, ( calea de semnal ) asa cum se vede si in poza montata o rezistenta in serie cu condensatorul de C3. In toate schemele la care m-am mai uitat condensatorul este primul si pe urma rezistenta. Exista vre-o influenta in functionare? Din cate intuiesc eu, nu. 2.pentru corectorul de ton am realizat alimentarea cu un traf de 18W (2x18V, 0.5A), redresare+ filtraj 2x10.000uF, 7915 si 7815. Inainte de transformator am prevazut o siguranta. Ce valoare trebuie sa aiba aceasta? Momentan am pus una de 0.3A, dar am si de 0.1A care cred ca ar fi cam la fix daca calculez bine.


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