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Philco 40-120 rework/recap
#5

Defiantly had to redo the wiring. That rubber wiring was was absolutely disgusting nasty! It was a slow process, I have big hands and this chassis is very tight. I have since read somewhere that if you are trying to learn this hobby to never start with a Philco 40-120. :-) I am determined to finish and make it work because it is a radio that has been in the family since it was made. Practice makes perfect and I have 3 total to fix.

The hardest thing for me has been identifying a closed circuit on the schematic. It finally clicked after reading through the book titled "How to Use Diagrams in Radio Servicing". On page 3 there is an illustration showing Ground at the bottom, a coil and a capacitor hooked to that ground, and the capacitor and coil hooked to a grid / anode pin on a tube at the top. I kept visualizing the whole time that current was flowing in a circle between the Capacitor and the Coil and that the pin on the tube was in series with the coil and the capacitor. It didn't dawn on me that the ground is on one end shared by the 2 components and that the tube pin is feeding current to both of the components then to ground.

Having fun and learning at the same time,,slowly.

Thanks for all the helpful replies.


Messages In This Thread
Philco 40-120 rework/recap - by t32above - 03-12-2024, 06:30 PM
RE: Philco 40-120 rework/recap - by morzh - 03-12-2024, 08:34 PM
RE: Philco 40-120 rework/recap - by Radioroslyn - 03-13-2024, 09:56 AM
RE: Philco 40-120 rework/recap - by MrFixr55 - 03-13-2024, 06:40 PM
RE: Philco 40-120 rework/recap - by t32above - 03-14-2024, 03:23 PM
RE: Philco 40-120 rework/recap - by RodB - 03-14-2024, 08:07 PM
RE: Philco 40-120 rework/recap - by radiorich - 03-15-2024, 07:00 AM



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