12-31-2015, 11:10 PM
I'm thinking you may have a burned carbon track in your band switch, in the oscillator section. Which of course is not good news. 
Either that, or something is shorting B+ to ground to drop your B+ voltage that much when the band switch is in one of the SW positions.
Some careful resistance measurements (with the set of and unplugged) might reveal the source of the trouble. I would measure resistance between the B+ line (both sides of resistor (44) and from there up to the oscillator "plate" or grid #2 of the 6A8G oscillator tube) and chassis ground with the set in all four of the SW positions. Also take these measurements in the AM position as a reference.
Either that, or something is shorting B+ to ground to drop your B+ voltage that much when the band switch is in one of the SW positions.
Some careful resistance measurements (with the set of and unplugged) might reveal the source of the trouble. I would measure resistance between the B+ line (both sides of resistor (44) and from there up to the oscillator "plate" or grid #2 of the 6A8G oscillator tube) and chassis ground with the set in all four of the SW positions. Also take these measurements in the AM position as a reference.
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Ron Ramirez
Ferdinand IN
