Re: Grundig tk 24
Other voltages aside, pins 2 and 7 should be 0v or almost 0v when measured with respect to ground, any positive voltage on those pins will reduce the anode voltage, measure pins 2 and 7 again with the valve removed, if they still measure positive I would check the coupling capacitors to the control grids (C17, C18, C20)
Lawrence.
Last edited by ms660; 18th May 2021 at 6:29 pm.
Reason: extra info
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