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Old 19th Dec 2009, 10:49 pm   #20
love kt3
Pentode
 
Join Date: Nov 2007
Location: Hifa Israel
Posts: 146
Default 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.
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