12-23-2018, 01:46 PM
Since I don't have a schematic it's a little hard to tell but typically the pri wound connect to an external ant and secondary is the tuned circuit. A lot of the tube type loops just have the tuned circuit but also have a small value cap connected to the grid side of the loop for an external ant connection.
Another way of troubleshooting is to use a signal tracer in the rf mode and connect an ant to the input of the receiver. Like a crystal set w/a tracer on the back end of it. Listen @ the ant connection (loop primary) while tuning around for a station then listen @ the secondary of the loop. If the found station signal level is less on the secondary this could be a good indication of a bad loop or the L/C ratio is way off. If the level is about the same or higher use the tracer to listen @ the base of the rf amp. Could be a bad component between the loop and the base of the rf transistor.
Another way of troubleshooting is to use a signal tracer in the rf mode and connect an ant to the input of the receiver. Like a crystal set w/a tracer on the back end of it. Listen @ the ant connection (loop primary) while tuning around for a station then listen @ the secondary of the loop. If the found station signal level is less on the secondary this could be a good indication of a bad loop or the L/C ratio is way off. If the level is about the same or higher use the tracer to listen @ the base of the rf amp. Could be a bad component between the loop and the base of the rf transistor.
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
