Quote:
Originally Posted by Penthode
The boost voltage is a most pertinent test. Another common fault is the HV Rectifier. How do you know it is good? Also is there a resistor in series with the HV Rectifier filament? They often go high reducing the filament current to a bare minimum and the low emission will cause the HV to sag.
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The boost voltage seems to be fluctuating with the brightness. Low brightness there’s 660v, high brightness it’s down to 580 I tried a solid state rectifier, nothing.