Welcome Guest! Be sure you know and follow the Phorum Rules before posting. Thank you and Enjoy! (January 12) x

Thread Closed
Thread Rating:
  • 0 Vote(s) - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5

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, 07:30 PM
RE: Philco 40-120 rework/recap - by morzh - 03-12-2024, 09:34 PM
RE: Philco 40-120 rework/recap - by Radioroslyn - 03-13-2024, 10:56 AM
RE: Philco 40-120 rework/recap - by MrFixr55 - 03-13-2024, 07:40 PM
RE: Philco 40-120 rework/recap - by t32above - 03-14-2024, 04:23 PM
RE: Philco 40-120 rework/recap - by RodB - 03-14-2024, 09:07 PM
RE: Philco 40-120 rework/recap - by radiorich - 03-15-2024, 08:00 AM



Users browsing this thread: 1 Guest(s)
[-]
Recent Posts
Philco 42-345 Restoration/Repair
RodB :beerchug:Vlad95 — 10:22 AM
Philco 42-345 Restoration/Repair
Vlad, you nailed it. Swiss and German roots.RodB — 09:54 AM
5U4 vs 5Z4 tubes
Well this is a Hallicrafters SX/9 circa 1936. No real issues so far although I dodged a real bullet with a cap that was...bridkarl — 07:59 AM
5U4 vs 5Z4 tubes
The pinout is the same but the 5U4 has a 3 amp filament, verses 2 amps or less on the 5Z4. I think that the pinout of a ...Arran — 12:04 AM
Philco 42-345 Restoration/Repair
By the way. osanders0311 Take a look here: Dial cord stringing Guides May be here you can fount correct string settin...Vlad95 — 11:15 PM
5U4 vs 5Z4 tubes
5U4 and 5Z4 almost identical. I think nothing happened if you left 5U4 instedad 5Z4 long time. Just heater current 5U4 ...Vlad95 — 11:02 PM
Philco 42-345 Restoration/Repair
Hello Vlad95 , Very Funny ! Sincerely Richardradiorich — 11:01 PM
Philco 42-345 Restoration/Repair
RodB You are European yourself   :evil: I'm Canadian for the last 30 years  :snowman: But not Yankee  :lol: Vlad95 — 10:49 PM
Philco 42-345 Restoration/Repair
The band switch selects different oscillator coils for the band selected. I would look for a bad connection in the switc...RodB — 10:31 PM
Philco 42-345 Restoration/Repair
Hang in there...PaulPaul Philco322 — 09:30 PM

[-]
Who's Online
There are currently no members online.

>