03-14-2015, 05:21 PM
Try measuring the voltage on pins 4 and 5 of the 6A7. Pin 4 is the oscillator plate where you should have around 150V. Pin 5 is the oscillator grid and there is a negative voltage there of a few volts if the tube is oscillating. Connect a 100K resistor in series with your DVM probe to measure voltages on these pins to prevent loading of the circuit at RF frequencies.
As Terry mentioned, the coils seem to measure ok, so the problem may be elsewhere.
As Terry mentioned, the coils seem to measure ok, so the problem may be elsewhere.
