[GregS[_3_]]

In article , wrote:
I've got an older technics amp (no tuner) that gets crackly on both
channels after it runs about 30 minutes or so. Sounds fine when you
start it up. Switchs and pots have all been cleaned. Any
suggestions? I'm guessing power supply but not sure what it could
be. Do the big caps start leaking after they get hot?

Caps are not supposed to get real hot. They can leak and, or, go bad.
Are the crackles the same on both channels. How many caps are there.
Does the amp include a preamp, etc.

greg