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Thanks for the input! Here's what I ended up finding... there was a white ceramic "Hi-Q" 1500pf capacitor shunting the input of the 1st sound I.F. from the tuner to ground. Looked a bit suspicious to me since it had wax in either end of it. Clipped it and measured ~1200pf. Replaced it with a silver mica BAM sound problem fixed.
Unfortunately, a couple of days later the tuner started bellowing smoke and I'm only left with raster. Very frustrating.
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