I have a Technics SU-V6 on it's way here. I'm going to do my usual work on it : new caps, WIMA films in the signal path, removing and regreasing the outputs, new trimmers, that sort of thing. But I was wondering what else should I do do it, either as upgrades or preventative maintenance? I have a short list of things :
- OA90 diodes seem to have reputation for going bad. Maplin Electronics in the UK (very reputable) has them for £1.39 each (which is about $1.80). I can get these sent here for free, so should I just go ahead and swap them all out?
- OP amps. There's an NJM4559 in the phono stage and an AN6552 in the tone stage. Preliminary searching here on AK show OPA1612 and OPA2134 as suitable replacements, but I might be mistaken. Is it worth replacing these?
- I already have the six fusible resistors down for replacement. R651-654 100R, R655-656 330R.
Anything else I should be concerned about? Small signal transistors?
Lee.
- OA90 diodes seem to have reputation for going bad. Maplin Electronics in the UK (very reputable) has them for £1.39 each (which is about $1.80). I can get these sent here for free, so should I just go ahead and swap them all out?
- OP amps. There's an NJM4559 in the phono stage and an AN6552 in the tone stage. Preliminary searching here on AK show OPA1612 and OPA2134 as suitable replacements, but I might be mistaken. Is it worth replacing these?
- I already have the six fusible resistors down for replacement. R651-654 100R, R655-656 330R.
Anything else I should be concerned about? Small signal transistors?
Lee.