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 87
#1

Upon further troubleshooting I found 1/2 of the output transformer open and the 2nd AF input transformer is melted open.
Does anyone have any suggetions?
Thanks
#2

Jimony, don't dispair, I had a lot of trouble with my first one, as a matter of fact it is still not up and running. The transformer will have to be replaced if possible. If a replacement can't be found you may be able to get it re-wound. The AF coil I am not familiar with but will take a look at the schematic and see if I can come up with an idea. Do you mean the first IF transformer? These alternative may get expensive so you will have to make a discision as to how to play it.
#3

Thanks for the reply. There is an input transformer fronm the 1st audio tube to the grids of the 45 tubes, It melted.
The output transformer from the plates of the 45's to the speaker has 1 side open. I read that the 45 is equivilent to the 2A3 tube. Looking in a catalog from TUBESANDMORE.com they have a 2A3 output transformer. I will email them for an exact description.

Thanks!
Jim
#4

Jimony, just so I know what we are talking about, the xfmer is part #25 2nd AF xfmer right? From the schematic that looks like an iron core xfmer, but since you are saying it "melted down", I'm assuming its tubular cardboard with coils wire wrapped around it, is that so? Pat
#5

The parts list shows p/n 3242 for the #25 push-pull input transformer and p/n 2848 for the #36 push-pull output transformer.
Chuck's site has info on the 3242 transformer:
http://www.philcorepairbench.com/audioinp.htm

Carl
Northern Panhandle, WV




Users browsing this thread: 1 Guest(s)
[-]
Recent Posts
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
5U4 vs 5Z4 tubes
5U4 and 5Z4 almost identical. I think nothing happened if you left 5U4 instedad 5Z4 long time. Just heater current 5U4 ...Vlad95 — 11:02 PM
Philco 42-345 Restoration/Repair
Hello Vlad95 , Very Funny ! Sincerely Richardradiorich — 11:01 PM
Philco 42-345 Restoration/Repair
RodB You are European yourself   :evil: I'm Canadian for the last 30 years  :snowman: But not Yankee  :lol: Vlad95 — 10:49 PM
Philco 42-345 Restoration/Repair
The band switch selects different oscillator coils for the band selected. I would look for a bad connection in the switc...RodB — 10:31 PM
Philco 42-345 Restoration/Repair
Hang in there...PaulPaul Philco322 — 09:30 PM

[-]
Who's Online
There are currently 993 online users. [Complete List]
» 3 Member(s) | 990 Guest(s)
AvatarAvatarAvatar

>