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

84b Power Transformer
#1

Recently acquired a Philco 84b radio.  Have to rewire, recap, and replace the resistors, so I pulled the transformer too.  When I tested to see if any of the windings were open and came up with the below values.  My question is in regards to the low reading for the windings supplying the filaments.  Based on a handful of restoration videos for this model, the reading is usually around 1 ohm. My readings are obviously much lower.  This is my second restoration, having previously refurbished a curb-find Philco 41-608 that really only need to be recapped and rewired. So I'm still just a novice.  Any help would be appreciated.

Primary (terminals 1 & 2): 10.2 ohms
Secondary to filaments on output tube type 42 (terminals 3 & 4): .4 ohms
Secondary to rectifier tube type 80 filament (terminals 6 & 7): .4 ohms
Secondary to the plates on the rectifier tube type 80 (terminals 9 & 10): 413 ohms
CT (terminal 8) to terminal 9: 215 ohms
CT (terminal 8) to terminal 10: 199 ohms


Messages In This Thread
84b Power Transformer - by percyjd - 09-17-2022, 06:20 PM
RE: 84b Power Transformer - by Radioroslyn - 09-17-2022, 06:37 PM
RE: 84b Power Transformer - by percyjd - 09-17-2022, 06:45 PM
RE: 84b Power Transformer - by Simon Wa3uay - 09-17-2022, 06:59 PM
RE: 84b Power Transformer - by Radioroslyn - 09-17-2022, 07:08 PM
RE: 84b Power Transformer - by percyjd - 09-17-2022, 07:29 PM
RE: 84b Power Transformer - by Radioroslyn - 09-17-2022, 08:18 PM



Users browsing this thread: 1 Guest(s)
[-]
Recent Posts
Philco 42-345 Restoration/Repair
Hi OSanders, Look carefully at the band switch. Turn it slowly and "wiggle" it around the desired band. ...MrFixr55 — 12:33 AM
5U4 vs 5Z4 tubes
I think that RCA and GE introduced metal tubes in the USA in 1936.  I don't know if they were being made by RCA, GE or b...MrFixr55 — 11:20 PM
Philco 42-345 Restoration/Repair
Vlad95, Thank you for the stringing guides and wow there are so manyosanders0311 — 06:01 PM
5U4 vs 5Z4 tubes
A pre war Hallicrafters, and an early one too, very nice! 1936 is pretty early for metal tubes too, which would explain ...Arran — 05:58 PM
Philco 42-345 Restoration/Repair
Thanks Rod, "When you hear the background hiss and no station it usually indicates that the oscillator quit" ...osanders0311 — 05:52 PM
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

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

>