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Have you verified that the 6AL5 phase detector (discriminator) is good and that it's lighting up? That would be the first thing to verify based on the symptoms you describe. Bill(oc)
The 4.3 ohm resistor in series with the heater for that tube might have shifted value also. But it might be more stable once you go through the setup.
01-15-2011, 01:36 PM
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