Amp Hum

How about throwing the amp away and buying a decent one?

Sailor, contrary to the above post, don't give up the ship yet! Is the hum from the amp chassis or the speakers? Is the hum constant, or intermittent? Is it source dependent?

Could this just be transformer noise -- i.e. mechanical hum? I just pulled out my old Adcom GFA555 (original version from the early 80's) for use as a sub amp. Works great but has a hum that's only audible when my system is off and it is dead quiet (except for the amp). It's not a major problem, since I can't hear it when listening, but I was planning on pulling the top and trying to tighten the transformer. Maybe lay a sheet of sorbothane under it?

These old amps are such work horses. Do they ever die? The only other glitch is that the power on/off switch just broke. But, as I've seen reported elsewhere on Audiogon, it broke in the "on" position. Even when they break, they work.

the actual amp hums not the chassis or through the speakers, and it is constant

Sailor, given that your amp is older, I would guess that the transformer is the culprit, either de-lamination of the plates, or mounting ... but given what I have read here, I would bet the transformer is the problem. And not a problem that should case you to dump your amp either.

If you do a search in the forums on just the word "hum", you will find probably 50 different threads. Several recommendations for use of isolation pads between the transformer and mounts seems to have provided positive results for some posters. Certainly read the threads though, because external factors have been attributed to be problems as well.

My opinion, for what it's worth.