Karl Uppiano wrote:

Interesting problem. I have a Heathkit AJ-1214 AM/FM stereo tuner and a
matching AA-1214 amplifier that I built in 1974 that still look and work
like new, in continuous 24x7 use. Played LOUD all through high school and
college. Too bad the Heath Company went out of business. They made some
great stuff.

Hmm. Once I've got all of my 'main' gear back together, I've got an
ancient AA-14 amp to try to restore. It works marginally, but is far
from healthy. Interestingly, there's a tuner that matches it, and it
seems to be behaving flawlessly.