02-21-2017, 04:18 PM
Typical symptoms:
Not enough turns on the feedback winding osc dies towards the low end of the band.
Too many turns a turn or two extra I don't think will make much of a difference. But a bunch extra will cause distortion in the osc output and harmonics.
Wound backwards (out of phase) osc won't work or will only oscillate at the high end of the band.
The feedback winding is there to couple some on the output signal back to the input. In this capacity (ha ha) it has very little bearing on the operating frequency. That is determined by the secondary and it's associated capacitors.
Humidity or water in the coil form greatly reduces the efficiency (or Q). Could cause the oscillator not to work.
Not enough turns on the feedback winding osc dies towards the low end of the band.
Too many turns a turn or two extra I don't think will make much of a difference. But a bunch extra will cause distortion in the osc output and harmonics.
Wound backwards (out of phase) osc won't work or will only oscillate at the high end of the band.
The feedback winding is there to couple some on the output signal back to the input. In this capacity (ha ha) it has very little bearing on the operating frequency. That is determined by the secondary and it's associated capacitors.
Humidity or water in the coil form greatly reduces the efficiency (or Q). Could cause the oscillator not to work.
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
![[-]](https://philcoradio.com/phorum/images/bootbb/collapse.png "[-]")
