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OK, one more update: after getting the picture looking great on channel 8, I decided to try fiddling with the audio alignment again.
Unfortunately, I ran into the same issue as last time: when I adjust the sound if transformer, the sound if amp starts oscillating, making it impossible to tell if it's peaked or just going nuts. Last time I solved this with an oscilloscope to tell whether the frequency is actually 4.5mhz (tuned to real signal) or different (oscillation).
Presumably this circuit isn't supposed to be this close to oscillation, right?
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09-27-2018, 03:02 AM
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