06-04-2024, 11:30 AM
I finally broke down and installed a switch to bypass the factory switch. That was indeed a bad switch with infinite resistance.
With the jumpered in switch ON the radio pulls .83 amps at 112 volts - but the radio is still totally dead. No filament voltages - absolutely nothing. Swapped out the rectifier tubes - nothing.
So the checking will continue. Back to Marcus and Levy to diagnose this unit. If this was an AA5 radio I’d think a bad tube is killing it but this isn’t. My suspicion looking more closely is some short in the transformer wiring. Under my loupe I’m seeing some really crummy wiring which I previously missed.
That said, I tested my parts unit - it appears to be working and has a working power switch. It’s seemingly in better shape than this other one.
I’ll recap this one - I’ll have one nice working unit in a nice case for me and eventually an average unit I can put on eBay or use for spares.
SUCCESS!!!!
Got that recap done - so much easier the second time. Radio works great.
AM broadcast and shortwave seems fine. I’ll check again this evening.
Just need to restring the dial cord and do some physical cleanup. And figure out how it gets into the case. It seems to be catching about 1/2 inch from the front on something. I’ll let this run for ten hours or so on the bench while I do something else
With the jumpered in switch ON the radio pulls .83 amps at 112 volts - but the radio is still totally dead. No filament voltages - absolutely nothing. Swapped out the rectifier tubes - nothing.
So the checking will continue. Back to Marcus and Levy to diagnose this unit. If this was an AA5 radio I’d think a bad tube is killing it but this isn’t. My suspicion looking more closely is some short in the transformer wiring. Under my loupe I’m seeing some really crummy wiring which I previously missed.
That said, I tested my parts unit - it appears to be working and has a working power switch. It’s seemingly in better shape than this other one.
I’ll recap this one - I’ll have one nice working unit in a nice case for me and eventually an average unit I can put on eBay or use for spares.
SUCCESS!!!!
Got that recap done - so much easier the second time. Radio works great.
AM broadcast and shortwave seems fine. I’ll check again this evening.
Just need to restring the dial cord and do some physical cleanup. And figure out how it gets into the case. It seems to be catching about 1/2 inch from the front on something. I’ll let this run for ten hours or so on the bench while I do something else
