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 46-480 Electronic Restoration
Nope, he can’t tell me the dimensions. Looks like I won’t be buying it.jrblasde — 02:38 PM
Philco 46-480 Electronic Restoration
Hello Joseph , It sounds like you found a good seller and yes shipping is really expensive ! Sincerely Richardradiorich — 02:16 PM
Philco 46-480 Electronic Restoration
There’s a lot of different search results for trust auto. I did confirm he takes Venmo, but I’ve got one last test. I as...jrblasde — 02:01 PM
Philco 91 Restore Code ??
I did the math to calculate the wattage of the resistor and found to be 47.16 watts using 3275 as fc resistance and your...dconant — 01:30 PM
New member
Hello all.  New member here. I bought a Predicta TV for my teenage son (who is into all things vintage, see attached pic...Jsmith5690 — 12:47 PM
Philco 46-480 Electronic Restoration
I’ve asked if they accept PayPal as payment so that I can contest it if the part doesn’t arrive.jrblasde — 12:46 PM
Philco 46-480 Electronic Restoration
Make sure the person who answered is not a scammer (lots of these there now) and the Trus A S, whoever they are and wher...morzh — 12:38 PM
Philco 40-120C Filament Wiring
I would disregard everything that is there now. I do not know who and when changed it. 1. Make sure that what you thi...morzh — 12:36 PM
Model 27-84 BUZZ?Humm?
Depends on the type of hum. SOme is made by outside devices. Try installing an X-cap (0.2-0.5uF) across the AC line, ...morzh — 12:23 PM
Philco 40-120C Filament Wiring
Thank you for your replies. That is the correct schematic and pin out diagram for the rectifier. The resistance acro...bluecap — 11:01 AM

[-]
Who's Online
There are currently 1580 online users. [Complete List]
» 3 Member(s) | 1577 Guest(s)
AvatarAvatarAvatar

>