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 37-670B power transformer question
#1

Hi all. I am just finishing a restoration on a 37-670B. I have noticed that the power transformer seems to have been replaced. Looks like someone took the top cover off the original and put it on another core. (bottom of core reads LP 0290 C). I only read 58 ohms across the B+ secondary and about half of that from CT to each secondary lead (should be 128 ohms across the primary). The voltage chart on the schematic says I should read 380v across cap #88; I only get 334v. Consequently the grid voltages at the RF, Det/Osc, and IF amp tubes is only about half of what it should be (43 instead of 90v).  Original power transformer # is 32-7640. I am wondering if anyone has the voltage specs for this transformer as I cannot seem to find them anywhere. Also if anyone could recommend a suitable replacement, that would help. Thanks,
   Tim


Messages In This Thread
Philco 37-670B power transformer question - by tiloco - 11-29-2015, 01:29 PM



Users browsing this thread: 2 Guest(s)
[-]
Recent Posts
6TPZ and 5TPO Radio Help
Sorry. The test points are as follows: 1 - 0v 2 - 0v 3 - 0v 4 - 12v 5 - 0v 6 - 11.9v 7 - 12v 8 - 12v 9 - 12v...R3Sons — 02:09 PM
6TPZ and 5TPO Radio Help
OK, so 18 and 19 as they should be. What is "everything else?" Try to be more specific in your descriptions:...morzh — 12:44 PM
6TPZ and 5TPO Radio Help
Yeah, I'm still on 5TPO. Sorry, my bad, points 1 and 2 should be points 18 and 19 (easy mistake  :think: )  X7 is shown ...R3Sons — 11:42 AM
Philco 40-120C Filament Wiring
Hi folks, I'm in the process of restoring a Philco 40-120C and I'm finding the wiring to be a bit puzzling. According to...bluecap — 11:28 AM
462ron
Hi Levi, here’s just a thought. Most radios run the oscillator higher than the dial setting. Say you set your radio to 1...462ron — 10:10 AM
1930s Stewart-Warner Tombstone Radio need help identifying model number
Another Update: I found a couple of damaged coils inside this radio that might have something to do with why this radio ...captainclock1988 — 10:51 PM
6TPZ and 5TPO Radio Help
If you are still on 5TPO, you lost me there. What X7? What Points 1 and 2?morzh — 08:37 PM
6TPZ and 5TPO Radio Help
Quick progress report: X7 is broken. Only one leg soldered, the other missing and the diode is cracked. I've replaced...R3Sons — 05:05 PM
6TPZ and 5TPO Radio Help
Oh...and you have electrolytic caps there. All need to go and be replaced.morzh — 04:36 PM
6TPZ and 5TPO Radio Help
Thanks, will do.R3Sons — 01:25 PM

[-]
Who's Online
There are currently 5878 online users. [Complete List]
» 2 Member(s) | 5876 Guest(s)
AvatarAvatar

>