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love kt3 · 19th Dec 2009, 10:49 pm

hi,that problem might be from an open or missing resistor from the 75 or 42 grid to ground.normaly there is a high resistor(~1mohm)at thse points-check resistance to ground with the set off and the said valves removed.

19th Dec 2009, 10:49 pm	#20
love kt3 Retired Dormant Member Join Date: Nov 2007 Location: Hifa Israel Posts: 146	Re: Newb Stumped on a Derwent hi,that problem might be from an open or missing resistor from the 75 or 42 grid to ground.normaly there is a high resistor(~1mohm)at thse points-check resistance to ground with the set off and the said valves removed.