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Akai 4000ds noise

T

theofish

New Member
Hi, (also posted on th forum)

I need opinion of you experts. I have an Akai 4000ds that I have cleaned pots, switches, heads etc. and it seems to work very well except for a static-like noise that is random, mostly on left channel. See the video below. It only does it when monitor is set to tape. I think it is also getting worse. Is this a case of the bad 2SC458 transistors? If so, how many will I need and will any KSC1845 do? I'm fairly experienced with electronics but wanted to check if anyone has had the same problem.

Thanks very much.

 
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2SC458 transistors were in all three Akai tape recorders I've had. GX-4000, CR-83D, GX650. 14 were in the GX-4000, 2 in the CR-83D and 8 (I think) in the GX-650.

With the 3 decks, all 2SC458's were replaced and that fixed their problems - noise, intermittent, or dead channels.

Transistors are cheap. Buy a bunch so you'll have enough. 100 of either KSC1845 or KSA1815 can bought from Digikey for under $20. Probably same from Mouser.
 
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