Quote:
Originally Posted by Phil Nelson
I am injecting the video signal downstream of the video detector diode -- at the grid of the 1st video amplifier.
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Understood. But the reason for asking was: since you're injecting at the grid, and the grid is DC-coupled back to the diode (i.e., no capacitive isolation), a shorted or partially shorted condition in the diode could be lugging down the genny's signal. Like I say, it's a shot in the dark. But easy to test by just lifting one end of the diode.