06-13-2012, 04:49 PM
Philco 40-185
This looks original and not messed with so I started recapping one at a time and was very careful of the wiring which is very brittle. Tubes tested good my problem is this. Across #61 a 12uf electrolytic which I replaced with a 20uf I get about 200vdc but across 58# a 16uf electrolytic I replaced it also with a 20uf I get 0vdc. Now the field coil shows 1100 ohms and I get continuity thru the wiring. I have a second radio a 41-285 that I've not started and had the idea of swapping speakers as the resistance is the same but it didn't make a difference.
Now across the transformer black leads I have 6.3vac filament voltage
Across the transformer yellow leads which go to the 84 plate I get 227 to ground
What am I missing? Why no voltage on the #58?
Eric
This looks original and not messed with so I started recapping one at a time and was very careful of the wiring which is very brittle. Tubes tested good my problem is this. Across #61 a 12uf electrolytic which I replaced with a 20uf I get about 200vdc but across 58# a 16uf electrolytic I replaced it also with a 20uf I get 0vdc. Now the field coil shows 1100 ohms and I get continuity thru the wiring. I have a second radio a 41-285 that I've not started and had the idea of swapping speakers as the resistance is the same but it didn't make a difference.
Now across the transformer black leads I have 6.3vac filament voltage
Across the transformer yellow leads which go to the 84 plate I get 227 to ground
What am I missing? Why no voltage on the #58?
Eric
