04-25-2025, 08:07 PM
First let thank everyone who helped ID this radio a few weeks ago!
I have replaced all the capacitors and was able to repair the top cap wires on the tubes that were broken.
Chassis was super dirty/rusty and after a fair clean up of the tuner with floss/alcohol it was fired up.
The 2 AM bands are working pretty good up to 1700. I can pickup some very strong stations and a lot of weaker ones with just a 60 foot wire antenna.
When switched to the shortwave band around 4.65meg I picked up strong static signal when fine tuning it. It sounded like real staticy audio.
Now I did picked up other static at points up to about 7.5 meg. From 10 to 22.5 meg I have never picked up anything.
When switching the Wave band switch back and forth I would lose everything (all bands) so i figured the switch is dirty. I cleaned all the gangs with electro-clean and Qtip.
I have now lost the medium shortwave, nothing no static. Also still nothing 10-22.5meg. AM 2 bands are still OK!
I'm trying to figure out the wave band positions on schematic to troubleshoot. Schematics say they are with switch in position 4.
I'm assuming position 4 is lower AM?
Then looking at the schematics of the wave bands are we rotating clock wise from the front view?
Magnified Schematic and printed so a little hard to tell what contacts on wave band closed.
I have not touched any adjustment screws.
I did not test tubes as i have no tester. But audio on AM is clear clean and can over drive the speaker.
I did check resistors in the circiut, some of the mica caps signature with a Huntron tracker.
I think I have bad component(s) on shortwave side but have to figure out this Wave band switch to see which switch setting for shortwave.
I'll go back with the tracker and start checking when i have time.
Also just found a sheet online that shows some voltage points so i will check those too.
Any help appreciated and thanks again for the previous information.
I'm learning....deflating when you touch something and you go backwards but it's a clue!
I just have to figure it out.
I have replaced all the capacitors and was able to repair the top cap wires on the tubes that were broken.
Chassis was super dirty/rusty and after a fair clean up of the tuner with floss/alcohol it was fired up.
The 2 AM bands are working pretty good up to 1700. I can pickup some very strong stations and a lot of weaker ones with just a 60 foot wire antenna.
When switched to the shortwave band around 4.65meg I picked up strong static signal when fine tuning it. It sounded like real staticy audio.
Now I did picked up other static at points up to about 7.5 meg. From 10 to 22.5 meg I have never picked up anything.
When switching the Wave band switch back and forth I would lose everything (all bands) so i figured the switch is dirty. I cleaned all the gangs with electro-clean and Qtip.
I have now lost the medium shortwave, nothing no static. Also still nothing 10-22.5meg. AM 2 bands are still OK!
I'm trying to figure out the wave band positions on schematic to troubleshoot. Schematics say they are with switch in position 4.
I'm assuming position 4 is lower AM?
Then looking at the schematics of the wave bands are we rotating clock wise from the front view?
Magnified Schematic and printed so a little hard to tell what contacts on wave band closed.
I have not touched any adjustment screws.
I did not test tubes as i have no tester. But audio on AM is clear clean and can over drive the speaker.
I did check resistors in the circiut, some of the mica caps signature with a Huntron tracker.
I think I have bad component(s) on shortwave side but have to figure out this Wave band switch to see which switch setting for shortwave.
I'll go back with the tracker and start checking when i have time.
Also just found a sheet online that shows some voltage points so i will check those too.
Any help appreciated and thanks again for the previous information.
I'm learning....deflating when you touch something and you go backwards but it's a clue!
I just have to figure it out.
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