[MrFixr55]

Hi Hamilton,

First off, I am not too worried about the high voltages. the radio was designed for about 115V and you are running it at 127V, that is about 10% high and may explaiin the high voltage for the plates of the 6A3s. Also, if this is a Class B amplifier, instead of a Class A amplifier, or if the 6A3s are weak, this, too can generate higher than expected voltage. I have seen that before when an audio output tube was weak.

First off, find the junction between the Field Coil and the 7750 Ohm resistor and measure. This Junction supplies B+ for all tubes except the Output tubes and Oscillator, so this must be good. It should be about 270V given your current voltage measurements.

Next check for about the same voltage on both sides of the Shadow Meter and the 2KOhm resistor that parallels it. If you found arounf 270V on one side and oV on the other side, then troubleshoot that circuit.

The common B+ for the plate voltage for the RF, 1st Detector and 1st IF passes through the shadow meter and the 2KOhm resistor in parallel with it. If this opens, then the plate voltage for these tubes is Zero, and because the screens are drawing excess current if the plates haved no voltage, the screen voltage may be low. This would have been the first place I would have you check, except that you state that the plate voltage for the 2nd IF is also Zero Volts. Check your wiring. You may also have 2 problems; an open at the shadow meter and an open at the output transformer for the 2nd IF. Troubleshoot that by measuring resistance between the 2nd IF Plate and the Audio Drover plate. It should be about 10KOhm, the value of resistor 61. If this is good but you still receive 0V at the 2nd IF Plate, then Cap #60 is shorted. You may not be able to read that short with a meter, just change the cap. If 60 is a bakelite block, then the internal connection must be broken if you just want to bridge the block.

The Candohm Resistor, #96 is all about generating bias voltages.

Hope this helps.