12-19-2017, 11:45 AM
Hi fellas -
I'm working on a PT-25. It's been recapped, new filter caps, repaired speaker, tested and swapped tubes and lubricated volume pot. However, there is clearly audio distortion. Cleaned the tube sockets and installed a few Philco nos tubes but no change. I suspect a resistor is the cause but the schematics I have do not give tube voltage values. I had planned to simply test the resistors but many are stuffed into very small locations with hardly any wire to even clip to.
Tube voltages would definitively reveal if there's a bad resistor correct?
Could there be another cause?
Thanks!
Paul
I'm working on a PT-25. It's been recapped, new filter caps, repaired speaker, tested and swapped tubes and lubricated volume pot. However, there is clearly audio distortion. Cleaned the tube sockets and installed a few Philco nos tubes but no change. I suspect a resistor is the cause but the schematics I have do not give tube voltage values. I had planned to simply test the resistors but many are stuffed into very small locations with hardly any wire to even clip to.
Tube voltages would definitively reveal if there's a bad resistor correct?
Could there be another cause?
Thanks!
Paul
