[DadsPhilco]

Hi GL, thanks for your further comments! It IS a high impedance circuit, I'm amazed at the low values of some of the capacitors. I'm from the solid state era and don't have much experience with these circuits. My 89 year old Dad is still around, and used to listen to this radio when he was a kid. My Dad is savvy on tube circuits from the day, and I'm hoping the two of us can get this thing back on its feet. It was actually Dad starting to trace his way through the schematic vs. the chassis that identified the discrepancies! My two cents, it seems like they went for the cost reduction as you mentioned. Thanks for the discussion on the alternate ways to mitigate the heater hum in other architectures, all interesting news to this solid state kid.