I am working on a Crosley 11-120U "dashboard" and have run into a problem. As the radio powers up, it sounds good, then the station strength fades and static takes over. If I dial down the voltage on my variac, the strong reception returns. I have changed all the tubes, recapped the set, and checked all the resistors. When checking voltages, the only socket voltage that seems off is on the IF Amplifier, 12BA6, socket 5 which runs to the 2nd IF transformer. Voltage there is 0, and should be around 88V. Any ideas? Thanks!

Bad IF transformer ?? ... coil opening or internal short ??
:I am working on a Crosley 11-120U "dashboard" and have run into a problem. As the radio powers up, it sounds good, then the station strength fades and static takes over. If I dial down the voltage on my variac, the strong reception returns. I have changed all the tubes, recapped the set, and checked all the resistors. When checking voltages, the only socket voltage that seems off is on the IF Amplifier, 12BA6, socket 5 which runs to the 2nd IF transformer. Voltage there is 0, and should be around 88V. Any ideas? Thanks!

Jeff, I can't seem to access the schematic, but if you've got one, check for a fixed capacitor inside the I.F. can. Good Luck.
Jim

Jeff-

I am President of the New Mexico Radio Collectors Club here in Albuquerque. I also collect and repair antique radios. You might check the 12BA6 to see if it has any internal shorts. Try a mutual conductance (dynamic) tube tester if you or anyone you know has one. It puts a signal on the grid and measures it's output on the plate. Also beware of any wax paper capacitors. They should be replaced as they lose tolerance and eventually short out. I always replace all of them as they can create an electrical fire hazard.