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Gentlemen, looking for some help in figuring out the cause of V+ at 618 volts, when it should be at 550 volts.This has taken out screen grid resistor and 90.9 k resistor at collector of TIP 50. I am working with a partial schematic for this amplifier, and would appreciate getting the full schematic if possible. I have taken this amp to a tech, but the problem has reoccured;including run-away bias, so I'll like to work on it myself with some help this time.
Follow Ups:
Does anyone know the value and characteristics of thermistor (TH 1and 2) on this amplifier? Or would any replacement do? Would appreciate any help.
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