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I am going to check the wave shap network cap, its a 680pf tube precision cap, comes off a resistor that is at the plate of the osc tube. If leaky I assume it could drag down the output.
I subed some other tubes (all test good on my hickok 533) for the horz osc, best I could get was 140pp. Low drive would sure explain the hot flyback and the fact that I have to turn the horz out bias all the way down to get the cathode current in check.
I have a local tube guy I may go to his place and check a bunch of nos 6BL8's and pick the strongest he can find (if the 680pf is ok).
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08-01-2010, 09:03 AM
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