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Philco 60 Oscillator with a Weird Problem
whirligig
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Posts: 38
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Joined: Feb 2017
City: manhattan beach, CA
#6

02-21-2017, 03:10 PM
Radioroslyn, I see the feedback circuit now. I did rewind it with 18 turns of 38 gauge wire but I have my doubts whether I did this one properly. During the build, I removed all of the crumbling cellulose and neutralized the windings underneath with ammonia/water. I replaced the cellulose with a piece of acetate and wound the coil around that. I think I need to pull the coil out and check the direction of the winding.

Is this coil suppose to be 18 turns or 17? One symptom I noticed is that 640 kc is near the middle of the dial and 1260 kc is near the end. I only got as far as tweaking the three IF trimmers before I ran into this problem.
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RE: Philco 60 Oscillator with a Weird Problem - by whirligig - 02-21-2017, 03:10 PM



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