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Mighty Monarch of The Air

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#10

07-10-2011, 06:30 PM

old_coot88 old_coot88 is offline

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Join Date: Sep 2009

Posts: 2,646

Hokay, how about checking the video detector diode (M4). While you got one end clipped loose, turn the set on and with a clip lead, intermittently short the grid of the 12AU7 1st video stage (V6) pin 2 to ground. Try this with the contrast control at both ends of its rotation. If the two video amp stages are working, there should be some very robust flashing of the raster.

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