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At the very least, L1 has to be drawn incorrectly in the above.. From the info provided, I'd suspect one winding goes from pin 1 to 2, the other 3 to 4. Not having the 117L7 diagram handy, I'm guessing on the interconnects. It looks (from the voltage readings) like it's not conducting.. (ref to the 8V "drop" across the 10K filter resistor.. (Less than 1mA) I'm also assuming that the heater is working? (Either visual inspection, or does the tube envelope heat up after a bit?) I also agree with the above suggestion, does the tube test good?
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08-20-2011, 11:37 AM
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