[Milsurplus] BC-348, brought 2 out of storage, past 20 or so years.

[jphutch60bj]

Smart people:

For both sets: When operating the Main Tuning capacitor, on any band, 
with BFO engaged, I get wobbly squeal, squeak in my audio output?

I don't recall that happening back in the day.

My thoughts are

1.    Re-Tighten the tuning capacitor down.

2.    Could be Some sort of build up between the main tuning capacitor 
and the chassis?  Clean the Cap and mounting areas

Am I sniffing the the correct direction,  if not, any suggestions as to 
the cause?

Thanks

JPH