01-25-2015, 03:19 PM
Thanks, Joe; I really appreciate that. There were times while I was working on this 788 that I wondered which was harder to rewire: the 42-788 or the 41-616. Now that I think about it, I believe the 41-616 was definitely harder to do. I'm glad to hear you have it working well. Maybe sometime in the near future I can see a demo of it in action?
Well, back to the 42-788.
I pulled the AM oscillator coil today, after taking careful notes as to how each of the wires hooked up.
[Image: http://www.philcoradio.com/images/phorum...88_046.jpg]
I had noticed what looked like a broken wire near terminal 1 of the coil before I removed it. After removal, it was readily apparent:
[Image: http://www.philcoradio.com/images/phorum...88_047.jpg]
It looks like something hit this coil, or scraped across it, causing a wire to break.
I carefully went over the coil with a heat gun to remove most of the old wax in order to see things better.
As it turned out, it was broken only one turn from the beginning. I unwound a few more turns just to see if the wire broke where it had been hit or scraped; the wire did not break, so those few turns were rewound and I soldered the end back to terminal 1.
After securing both the beginning and the end with hot glue, I went over each end of the coil with clear nail polish to hold the windings in place.
Afterward, it looked like this.
[Image: http://www.philcoradio.com/images/phorum...88_048.jpg]
I kept checking the coil with the ohms function of my DMM to make sure it was OK. I checked it over a final time after it was back in the radio.
[Image: http://www.philcoradio.com/images/phorum...88_049.jpg]
Now, it was time to try it out...
Well, back to the 42-788.
I pulled the AM oscillator coil today, after taking careful notes as to how each of the wires hooked up.
[Image: http://www.philcoradio.com/images/phorum...88_046.jpg]
I had noticed what looked like a broken wire near terminal 1 of the coil before I removed it. After removal, it was readily apparent:
[Image: http://www.philcoradio.com/images/phorum...88_047.jpg]
It looks like something hit this coil, or scraped across it, causing a wire to break.
I carefully went over the coil with a heat gun to remove most of the old wax in order to see things better.
As it turned out, it was broken only one turn from the beginning. I unwound a few more turns just to see if the wire broke where it had been hit or scraped; the wire did not break, so those few turns were rewound and I soldered the end back to terminal 1.
After securing both the beginning and the end with hot glue, I went over each end of the coil with clear nail polish to hold the windings in place.
Afterward, it looked like this.
[Image: http://www.philcoradio.com/images/phorum...88_048.jpg]
I kept checking the coil with the ohms function of my DMM to make sure it was OK. I checked it over a final time after it was back in the radio.
[Image: http://www.philcoradio.com/images/phorum...88_049.jpg]
Now, it was time to try it out...
--
Ron Ramirez
Ferdinand IN