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#4
09-11-2023, 12:56 PM
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All I can find is the schematic for the Dumont RA-108 , which I'm hoping is close enough.
Could it be perhaps that V1 RF amp is not working at all, or very weakly, and that the pattern generator in question is just putting out such a strong RF signal that it's able to blow past the defective stage, where the modulator lacks the power to do the same? Lack of snow with nothing connected would be a clue of this, which is what I believe old_tv_nut alluding to.
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