05-11-2020, 07:02 PM
<The Sams AM instructions say tuning gang fully open, Philco says tuning gang fully meshed.
Doesn't matter. If your the rebellious type put it in the middle. The tuning cap has nothing to do with IF stage(s) it's before the IF. What it does do is offer a little bit of resistance to pass the 455kc signal as it's tuned to the incoming signal. It's slightly more resonant at 550 than 1600kc but it's of little consequence. Just needs to pass some 455kc signal thru the rf amp and to the mixer grid and your good. The tuning of the rf and mixer is not absolute in that it does not block all other other signals except for the one that it is tuned to.
GL
Doesn't matter. If your the rebellious type put it in the middle. The tuning cap has nothing to do with IF stage(s) it's before the IF. What it does do is offer a little bit of resistance to pass the 455kc signal as it's tuned to the incoming signal. It's slightly more resonant at 550 than 1600kc but it's of little consequence. Just needs to pass some 455kc signal thru the rf amp and to the mixer grid and your good. The tuning of the rf and mixer is not absolute in that it does not block all other other signals except for the one that it is tuned to.
GL
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
