02-21-2017, 04:25 PM
(02-21-2017, 03:10 PM)whirligig Wrote: 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.
I'm not sure if I'm understanding what you are doing but if you are trying to set the dial frequency by adjusting the IF transformers DON'T. They need to be adjusted to peak at the IF frequency of 460kc.
When my pals were reading comic books
I was down in the basement in my dad's
workshop. Perusing his Sam's Photofoacts
Vol 1-50 admiring the old set and trying to
figure out what all those squiggly meant.
Circa 1966
Now I think I've got!
Terry
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