08-27-2018, 07:18 PM
Hi Tom and welcome,
> Any Ideas on what is causing this and how to cure it?
Probably interference from some modern electrical device like a battery charger or computer. Unplug the offending device. In some cases ground may help but it's a roll of the dice.
>should the local oscillator frequency be set above the desired station frequency or below it?
On most sets Philco and others it's above the incoming signal. On some communications receivers it's below on the higher frequency band, + 25mc.
> Any Ideas on what is causing this and how to cure it?
Probably interference from some modern electrical device like a battery charger or computer. Unplug the offending device. In some cases ground may help but it's a roll of the dice.
>should the local oscillator frequency be set above the desired station frequency or below it?
On most sets Philco and others it's above the incoming signal. On some communications receivers it's below on the higher frequency band, + 25mc.
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 "[-]")
