[alwayslearning]

Your welcome
Film or mylars are fine you don't want to use electrolytic caps in this supply as the ripple current will cause the input cap to short. It happened to my set after about 6 months of operation.

I wouldn't bother to remove 31. If you can't sleep at nite knowing that it's there you  could hook a low value resistor to bleed off any ac leakage between LOC and GND. Something like a few hundred ohms. On second thought you could unsolder the connection from the mains to the condenser bank rather than physically removing #31. That's too much like work! It is the .015mfd

Oscillation? Read squeals like a stuck pig across the MW band. If it's doing it you'll know it as you can't turn the volume down to control it.

If you would like to try a little experiment to improve the audio frequency response try adding a .005 mfd/630v cap across the top of #22 (audio transformer) In other words from the junction of #24 and #22 to the grid of the 26 tube. If it does help you can play with the value by making it smaller or larger.

Terry

Terry,
So I'm still confused on the function generator vs rf signal generator device.  I have a function generator which is good to 5MHz so 1300kHz is easily produced - would that not work?  I do know that it's minimal output is 5mv though.  Suppose I can put it through a voltage divider to get it down to your 50-100 microvolt specification?
Thanks - Keith