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flyingtech55 · 2nd Oct 2017, 11:10 pm

There's also probably some form of coupling capacitor to the control grid of the pentode section of the PCL805. If renewing the resistor and capacitor in the cathode cct. doesn't correct the problem look at renewing the control grid coupling capacitor. It doesn't take much leakage to upset things.

HTH

TimR

2nd Oct 2017, 11:10 pm	#5
flyingtech55 Octode Join Date: Nov 2005 Location: Ayrshire, UK. Posts: 1,096	Re: Frame cramp Baird M676 help There's also probably some form of coupling capacitor to the control grid of the pentode section of the PCL805. If renewing the resistor and capacitor in the cathode cct. doesn't correct the problem look at renewing the control grid coupling capacitor. It doesn't take much leakage to upset things. HTH TimR __________________ All those moments will be lost in time, like tears in rain.