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I was gonna suggest essentially the same thing.. incrementally 'walking' the IF adjustments back, while looking for the best rendering of fine detail in the pic, with no ringing or smearing of fine detail. Probably have to re-tweak the Ch 3 osc slug along the way, to keep the fine tuning range centered.
There was a guy on here two or three years ago, a total newbie with a late 40s Dumont (I forget his name. Phil Nelson probably remembers). The guy did an IF alignment totally by eyeball, no instruments, no nothing. But damn if he didn't end up with a perfect pic, just as good as with a full instrument alignment. That might be the way to go with this one.
If you want to go the eyeball route and have a frequency counter that'll read 85.25 mc, set the Ch 3 osc slug to that frequency. (A turn or two of wire taped around the osc/mixer tube oughta provide a decent pick up.) With the fine tuning at mid range, the osc wants to be at 85.25 mc for a 24 mc IF. That way, you have a 'target' to walk the IF adjustments toward.
(Ch 3 carrier is 61.25 mc.)
Last edited by old_coot88; 10-24-2016 at 11:24 PM.
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