Quote:
Originally Posted by dieseljeep
The set in question uses Philco's famous funky Phase inversion circuit.
The center tap of the power transformer is above ground, to furnish grid bias for a few of the circuits including the audio output tubes, -15 volts sounds about right.
I know, Philco used that circuit in several models, that one being one of the first. I recapped a few of the sets using the circuit, but never had that problem.  |
I was wrong when I posted -15 volts. I just got done measuring it and it's a bit above -3 volts. Maybe I have a power supply problem. Will do some more checking.