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 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
91H Code 126 Restore
When it comes to the cloth covered power cords, if they are not frayed, and are flexible, and if I can bend one without ...Arran — 06:21 PM
An attempt to remove the Field Coil from a G speaker
Could be. The central cylinder is OK, but the sides are...well. What's done is done. I wonder if some standard bobbine w...morzh — 06:02 PM
An attempt to remove the Field Coil from a G speaker
Mike; As I was saying it doesn't look like they used much of a bobbin for the field coil, not like a Magnavox one wou...Arran — 05:49 PM
Atwater-Kent 84, restoration.
This AK84 was bought, I think, last fall. For a whopping $100. It has been, according to the seller, restored. As I go ...morzh — 05:48 PM
Philco model 60
Plus I forgot that I have a spare complete Philco FC speaker, that would work perfectly, now that I don’t need it. Got i...Radios1340 — 05:36 PM
Philco model 60
Duh! I guess I can’t read an ohm meter today. I took the oscillator coil out and will take some readings tomorrow.Radios1340 — 05:30 PM
An attempt to remove the Field Coil from a G speaker
Well, I killed the coil. Tried to get to the end of that oxidated spot, but while holding the coil in hand, i let it sl...morzh — 05:27 PM
91H Code 126 Restore
It does not require taking apart. Find an opening, any gap that would lead inside, where the resistive element and the ...morzh — 04:59 PM
Philco 70 antenna lead
I agree. From the ones I've worked on its always been that green corrosion that causes the coils to open.Jim Dutridge — 04:34 PM
91H Code 126 Restore
Well I'm making good progress. All the bakelite blocks have been recapped.  I found that using a heat gun and skinny ...RealRider — 02:35 PM

[-]
Who's Online
There are currently 4951 online users. [Complete List]
» 2 Member(s) | 4949 Guest(s)
AvatarAvatar

>