Hi:

I'm looking to buy a single, early, gray end bell Dynaco A-431 output
transformer or Mark III amp with the same. The transformer must be in known
working condition.

I can purchase for cash or trade for vintage hi-fi and/or tubes. Any trade
could be plus/minus cash. Components available for trade include Dynaco Stereo
70, PAS-2, FM-3 and other assorted vintage tube receivers, basic amps and
integrated amps. Also a pair of Dynaco A-10 speakers. Thanks.

Gerry