enito Posted September 28, 2023 Author Share Posted September 28, 2023 1 minute ago, Stephen said: Sorry - I mentioned the old type of transistor in the Akai units as being germanium. All newer stuff since probably late 60s to early 70s has been silicon transistors. But I have definitely heard "noisy" transistors like this before. In my Akai reel to reel, as it warmed up, it would sound like someone was blowing wind into a microphone. Perfect thx for the aclaration, i try to replace all 3 2N3906 . Regards! Quote Link to comment Share on other sites More sharing options...
enito Posted September 29, 2023 Author Share Posted September 29, 2023 Hi there, i replaced the 4 transistors and some caps but the noise continue 😕 Regards and thx for reading and reply Quote Link to comment Share on other sites More sharing options...
enito Posted September 29, 2023 Author Share Posted September 29, 2023 Hi, question .. I start to replace capacitor but i found a area without polarity, this ones ar NP capacitor. Can replace this ones with polarized caps with same or better UF and V? Thx!! C100, C102 and C103 Quote Link to comment Share on other sites More sharing options...
enito Posted September 30, 2023 Author Share Posted September 30, 2023 Finally i get in my garbage hehe some Nps capacitors. I installed, move the area sound to the RF zone, but same result noise.. Only in this area i get more volumen. Regards! Quote Link to comment Share on other sites More sharing options...
enito Posted October 6, 2023 Author Share Posted October 6, 2023 Hi, Finally today i rechecked i cleaned some contacts in the back of the board and ...WORKS!!! now i get clean sound! Thx for your help and tips . Regards! 2 Quote Link to comment Share on other sites More sharing options...
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