12-02-2021, 06:35 PM
Well...the power chassis is a mess. The interstage transformer has an open primary, one choke is open, and the AVC 6J5 is broken. Theory that I have is the filter cap shorted, which caused excessive current through the choke, which burned out. This is on the side with the candohm voltage divider resistors; if the choke goes open, no current flows, which means no bias voltage source. As the 6F6 driver is fixed bias and fed from the other power transformer, no bias caused excessive plate current, which burned out the interstage primary winding. Oh, well.....
