01-27-2026, 01:44 AM
So where is your cartridge connected now? There is no transformer there now right? I would try across R221 and if you needed more volume terminal 2 of PB-1.
As always as John said check your voltages around the 7X7 &7AF7 you may find an out of tolerance plate resistor or a weak tube. This will insure your amp is in good order. The 7X7 triode is the preamp for the am and fm detectors only not the phono.The 7AF7 1st section is the phase inverter and 2nd section is the phono preamp. In the phono position the signal goes from the 2nd 7AF7 section to the 7X7 to the 1st 7AF7 section then to the 6V6's.
https://philcoradio.com/library/download...6-1947.pdf
As always as John said check your voltages around the 7X7 &7AF7 you may find an out of tolerance plate resistor or a weak tube. This will insure your amp is in good order. The 7X7 triode is the preamp for the am and fm detectors only not the phono.The 7AF7 1st section is the phase inverter and 2nd section is the phono preamp. In the phono position the signal goes from the 2nd 7AF7 section to the 7X7 to the 1st 7AF7 section then to the 6V6's.
https://philcoradio.com/library/download...6-1947.pdf
When my pals were reading comic books
I was down in the basement in my dad's
workshop. Perusing his Sam's Photofoacts
Vol 1-50 admiring the old set and trying to
figure out what all those squiggly meant.
Circa 1966
Now I think I've got it!
Terry
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