[Electronic M]

I go to Chester electronics occasionally.

There is one thing they sell that I no longer buy: Electrolytic Capacitors. Most of their stock has been sitting longer than I have been alive. Lytics go bad from age and they fail faster when they spend significant periods of time without voltage on them. The first time I went to Chesters I bought some lytics and tested them for esr and leakage. Atleast half were marginal or bad. There's a fair chance the caps you swapped in are as bad or worse than what you pulled out.

You would be better served going with an online supplier with fast turnover like mouser, digikey, Newark etc. and spacing out a good brand 105c rated cap. IIRC Chester also is more expensive than them.

The stuff to go to Chester for is NTE semiconductors that have been out of production so long you can't find them online and stuff for 50s-70s sets that you can't believe NOS parts still exist for.