08-06-2011, 09:19 PM
Hi Paul and welcome!
As you can tell by the schematic this thing is a superhet with a regenerative detector. every part in this thing has to be on the money in order for it to work properly. Mostly the high value resistors in the detector circuit and the bypass caps. Also it's very common for the osc feedback winding to go open. If you pull it out look at the winding at the bottom of the coil if you see any green it's time to rewind. 25t of 32to38g wire will work fb. Check chassis ground connections too. You can also search this site for models 57,80,81,600,84,37-84,37-600 and Philco Jr. All have this same sort of circuit.
Guk lk om
de N3GTE
Terry
As you can tell by the schematic this thing is a superhet with a regenerative detector. every part in this thing has to be on the money in order for it to work properly. Mostly the high value resistors in the detector circuit and the bypass caps. Also it's very common for the osc feedback winding to go open. If you pull it out look at the winding at the bottom of the coil if you see any green it's time to rewind. 25t of 32to38g wire will work fb. Check chassis ground connections too. You can also search this site for models 57,80,81,600,84,37-84,37-600 and Philco Jr. All have this same sort of circuit.
Guk lk om
de N3GTE
Terry
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
