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Before rebuilding the couplate, i would verify that the cathode>ground connection is good on the HO tube. If still no go, sub with a known good tube (a 'BQ6 would do for the test).
Once the tube is conducting, the G1 drive `might` assume the correct waveform.
Last edited by old_coot88; 05-11-2012 at 12:12 PM.
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