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

Philco model 90 Power Transformer
#1

Still working on the Philco Model 90. I had to get a new power transformer and the person that sold it to me cut it out and did not mark anything for me. Can anyone help me with some information on ohms or a wire layout on this particular transformer. I can't use the original one because they had the wrong transformer tacked in to the chassis. Any help would be appreciated.
#2

Can you determine which is the primary wires and do you have a variac?
#3

for starters ,,,open the shell up,,,post some pictures,,,,get a meter with ohms on it,,,,and the Gentlemen can help you,,,
#4

It's usually pretty easy to figure out which winding is which, especially with a modern DMM, the lowest resistance winding is going to be the 2.5 volt one, followed by the 5 volt, then the primary, then the highest resistance winding is going to be the H.V winding. There may actually be two 2.5 volt windings, one for the power output tubes, and the other for the rest of the set, the one for the power output may have a center tap in it, or a large center tapped resistor across the winding, I'm not sure how Philco wired these off hand.
Regards
Arran
#5

Sorry guys, I posted this and then got called away to work. I have 4 more days and then I will try to do the things you asked of me. Sorry about the delay and thanks for responding.




Users browsing this thread: 1 Guest(s)
[-]
Recent Posts
Shadow Meter Bulb
Phorum members, I am trying to find the bulb # for PHILCO Shadow Meter part number 45-2180 that is from a 37-640 chassis...georgetownjohn — 06:53 PM
Philco 41-608 changer coupler
3D-printing...short of machining, of course. Or molding.morzh — 05:20 PM
Philco 41-608 changer coupler
Thanks, Morzh. That solves the issue of the rubber pieces. Now, I need to find a way to replicate the pot metal piec...alangard — 05:07 PM
12' Philco
If it is 12', either Kareem or Andre would have to jump pretty high to look at the front panel. Kareem would have an e...morzh — 01:48 PM
12' Philco
And here's a story about the tires on the truck. Same "no-stoop" guy must have installed these! Take care a...GarySP — 01:17 PM
Hickok AC51 tube tester
I think they have only shown the secondaries of the transformer. Two of them feed the rectifiers' filaments.morzh — 12:58 PM
IF can wire size and Rubber mounts?
Arran If the wire inside cans is the gauges you mentioned, the sole reason for that would be mechanical, to stiffen t...morzh — 12:56 PM
12' Philco
Rod, Yes, I know, but the Giant Philco is not around anymore either, so I go by whoever was alive fairly recently. H...morzh — 12:54 PM
Hickok AC51 tube tester
Absolutely no one is going to reverse engineer that circuit. Even the iron core is missing.RodB — 10:37 AM
IF can wire size and Rubber mounts?
Thanks to both members for your help regarding wire and tuner mtg supports. regards--Johngeorgetownjohn — 09:33 AM

[-]
Who's Online
There are currently 5768 online users. [Complete List]
» 1 Member(s) | 5767 Guest(s)
Avatar

>