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 42-1012
#1

Can anyone tell me what the resistance of the Transformer windings should be?

I measured about .4 Ohms on the filament windings . I know that the filament are a low reading but this sounds shorted. This is with the filament leads disconnected.. The other windings to the plates of the 5Y4G read approx 200 Ohms, and to the Cathode read .4 ohms. This is also without the tube in socket..

If the transformer is shorted does anyone know where I can get another one?

Thanks
Skip...
#2

Welcome to the Phorum!!
The filament section on the transformer is often only a few tenths of an ohm so your reading sounds OK.
#3

If you want to check filaments you disconnect transformer, as in parallel the transformer wins and it is, as said before, only few tenths of ohm.
but I think you are OK, as you can check wiring separately without disconnecting, and the tubes should be checked anyway each on its own.

People who do not drink, do not smoke, do not eat red meat will one day feel really stupid lying there and dying from nothing.
#4

I have a complete 42-1012 chassis with good transformer, if interested, PM me .
#5

Update: I think the transformer is OK.. Using the dim bulb test I think I misread the results. I put in a 60 watt bulb and it lit dimly. I put in the rectifier tube and it also ( the bulb) lit dimly. Not Bright like a 60 watt bulb would be..

I do have a replacement chassis in the works thanks to Davidff just in case.

So on to Capacitor Replacement ( almost done) . The electrolitics were replaced before I tried the dim bulb test..

Skip...




Users browsing this thread: 1 Guest(s)
[-]
Recent Posts
Philco 50-925 antenna connections
That's super. Glad to hear you figured it out. Paul.Paul Philco322 — 11:11 AM
Philco 50-925 antenna connections
Hello Keith, great news !! Sincerely Richardradiorich — 02:14 AM
Philco 50-925 antenna connections
Finally, got the antenna fixed (repaired some broken wires) and have the radio playing. I've got four different schemat...keith49vj3 — 09:38 PM
1949 Motorola 5A9M
Bob, Nice radio.  I’ve not seen one before.  Keep us updated!Joe Rossi — 07:56 PM
Phioco 90 Power Transformer Wire Colors
Thanks for adding that information.klondike98 — 06:09 PM
Phioco 90 Power Transformer Wire Colors
Although I have used this site as a resource for a number of years this is my first post.   I am restoring a Model 90 si...vincer — 05:02 PM
My collection presentation
There is a complete instruction how to solve your problem. One piece of advice - be careful with the low-voltage capacit...Vlad95 — 09:32 AM
My collection presentation
Vlad; I thought your brown RCA portable looked familiar, I have one that is very similar, the RCA-Victor model BX-55....Arran — 02:31 AM
Value of capacitor
OP is "original poster"klondike98 — 11:05 PM
Value of capacitor
What is an OP?  Looks like the “OP” mistakenly typed electrolytic.  Lets forgive him.Joe Rossi — 06:31 PM

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

>