[hsusmann]

OK, now I found the schematic (via your link to Nostalgia Air)
the copy in post 108 is way too low resolution to see anything
on the schematics.

Now I have a question, which tube's grid cap were you touching
with your finger to get the volume to come up?

Was it the 78 RF amp tube's or the 6A7's control grid?

This will tell us what area of the circuit to start looking at.

I will be back later today to check for replies...

Herb S