A friend asked me to repair his Circa-1979 Yamaha CR-440 receiver. Looks like the audio PA is bad. Unfortunately, the IG-02990 module is no longer available. (At least, I can't justify the $250 minimum order....)
Can someone confirm an STK-0040 as a viable replacement?
Now the reason for posting in SED: the STK part isn't widely available either.
Everything in this receiver seems to work except the audio amp. And actually, it's a really nice unit in great shape!
My question: IF I had to, I suppose I could re-engineer an audio amp to at least get it functioning again. (My immediate thought is to use a pair of National Semi "Boomer" series amps...) There's plenty of room and heat sinking available inside.
Originally, this was a 30-watt unit, but nothing says it has to stay that way.
Obviously, I would prefer to just swap the final(s) and be done with it. But just in case, what would you guys recommend for a no-nonsense, low parts count "retrofit" for something like this. Thanks. -mpm