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OK here's a simplified sketch from the CTC-7 schematic.
There's a second tube on that board, a 12BY7. Is it lighting? (Assuming it is.) It'll have 6V on pins 4 and 5, which are tied together, with the center tap (pin 6) grounded.
There should be a long trace (or possibly a wire topside of the board) going over to the 6AW8, carrying 6V to pin 4. If 6V is absent, look for an open somewhere on that line.
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If there is 6V on both pins 4 and 5, look for an open ground offa pin 5.
Last edited by old_coot88; 08-28-2015 at 09:13 AM.
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