02-14-2008, 05:46 PM
The main B+ would be measured between point D and one of the following points: the center tap of the high voltage winding of the power transformer; pin 2 of resistor (26); or pin 2 of the multi-section filter condenser can. Point J carries a lower B+ voltage that has been dropped by the speaker field coil.
If both primary and secondary of interstage transformer (22) are open, then no, one cannot generally convert it to R/C coupling since the secondary is feeding two tubes connected in push-pull. You'll have to replace this transformer with another one.
If both primary and secondary of interstage transformer (22) are open, then no, one cannot generally convert it to R/C coupling since the secondary is feeding two tubes connected in push-pull. You'll have to replace this transformer with another one.
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Ron Ramirez
Ferdinand IN
