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How much DC voltage do you have on the screen grid and plate of the 36?
I am wondering because when you removed the 42 the supply was unloaded and the B+ rose higher. With the higher voltages the osc started working correctly, so maybe your screen voltage is marginally low?
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RE: Model 89 Cathedral - by Mondial - 03-12-2014, 10:02 PM
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I did try an LED bulb in place of the original but wasn't impressed with the amount of light on the dial. Seems like it ...RodB — 03:51 PM |
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Would mounting he transformer vertically change the hum, if used without additional parts?
Also, in these amps...morzh — 02:25 PM |
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I doubt it would introduce any noise. We use similar lamps for the panel indication, 12V AC lamps: they are LEDs...morzh — 02:15 PM |
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