06-26-2023, 07:23 PM
+1 on Morzh's comments.
Below is a link to an article regarding rewinding coils.
https://philcoradio.com/library/index.ph...lco-coils/
The only one listed for the Model 90 is the RF Primary. Maybe that means that the other coils are relatively solid. Ohm the coils. If they check out, you are good. I had issues with coils in the 20, 80 and 89. The 20 was easy because it is TRF and the primary windings (the ones that usually go bad) are not critical. The 80 was not terrible. The 89 was a nightmare.
I have used a combination of flat and conical faucet washers to replace the rotted rubber grommets that mount the tuning capacitor. The Experts on the Phorum may be able to tell you if correct reproductions are made. I may be wrong, but I believe that the only fixed mica caps in this radio are to filter RF from the detector output and AF Amp input.
Below is a link to an article regarding rewinding coils.
https://philcoradio.com/library/index.ph...lco-coils/
The only one listed for the Model 90 is the RF Primary. Maybe that means that the other coils are relatively solid. Ohm the coils. If they check out, you are good. I had issues with coils in the 20, 80 and 89. The 20 was easy because it is TRF and the primary windings (the ones that usually go bad) are not critical. The 80 was not terrible. The 89 was a nightmare.
I have used a combination of flat and conical faucet washers to replace the rotted rubber grommets that mount the tuning capacitor. The Experts on the Phorum may be able to tell you if correct reproductions are made. I may be wrong, but I believe that the only fixed mica caps in this radio are to filter RF from the detector output and AF Amp input.
"Do Justly, love Mercy and walk humbly with your God"- Micah 6:8
Best Regards,
MrFixr55
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