Re: Trio 9R-59D receiver problems.
V8 pin 2 is the cathode of the output valve. It should show a steady 6.5 VDC. If the reading fluctuates suspect the valve being loose in the valve holder or a problem with either the cathode resistor or its bypass capacitor.
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Graham. Forum Moderator
Reach for your meter before you reach for your soldering iron.
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