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

42-PT-93 Please Help
#1

Hello, all.

Well, I couldn't resist picking up another radio.  It's a 42-PT-93.  The schematics are located here:  

http://www.nostalgiaair.org/PagesByModel...014176.pdf  

I did the usual recap and replaced the resistors but I am not getting any sound from it but the tubes and dial lamp light up.  The tubes are also good.  I tried touching the center tab of the volume control but don't get any hum.  I replaced the volume control but still don't get any hum but the speaker makes a pop when I connect it to a 9v battery.  When I tried taking ohm readings on the 50L6GT, I accidentally touched both pin 2 and 3 at the same time and got a loud hum from the speaker.  

I tried taking readings on the loctals by connecting the negative of my digital multimeter to ground, turning the volume control to full, and touching the positive to each pin but I must be doing something wrong because I don't get readings on any of them.  

I measured the oscillator coil from ground with the volume turned all the way up and got these readings  (not sure if I have the pins correct, though):

Pin 1 - .7
Pin 2 - no reading (DMM doesn't change if that makes sense)
Pin 3 - no reading
Pin 4 - 7.1
Pin 5 - 6.9

I read somewhere on this forum how to rewind this type of oscillator but I can't find it now.  If someone could point me in the right direction, I'd appreciate it.  A picture of it is attached.

Finally, the case has a built in loop antenna.  The two ends were unattached to anything when I got it and I can't figure out where one end goes.  I know one goes to the tuning condenser but where does the other end attach?

Any help is greatly appreciated.

Dave


Attached Files Image(s)
       


Messages In This Thread
42-PT-93 Please Help - by dseverson - 05-04-2015, 03:56 PM
RE: 42-PT-93 Please Help - by Nick3092 - 05-04-2015, 04:18 PM
RE: 42-PT-93 Please Help - by morzh - 05-04-2015, 04:21 PM
RE: 42-PT-93 Please Help - by Radioroslyn - 05-04-2015, 05:04 PM
RE: 42-PT-93 Please Help - by dseverson - 05-05-2015, 12:22 AM
RE: 42-PT-93 Please Help - by Radioroslyn - 05-05-2015, 07:10 AM
RE: 42-PT-93 Please Help - by dseverson - 05-05-2015, 05:21 PM
RE: 42-PT-93 Please Help - by Radioroslyn - 05-05-2015, 07:34 PM
RE: 42-PT-93 Please Help - by dseverson - 05-05-2015, 09:11 PM
RE: 42-PT-93 Please Help - by dseverson - 05-05-2015, 09:12 PM
RE: 42-PT-93 Please Help - by Radioroslyn - 05-05-2015, 09:30 PM
RE: 42-PT-93 Please Help - by dseverson - 05-05-2015, 09:16 PM
RE: 42-PT-93 Please Help - by dseverson - 05-05-2015, 10:42 PM
RE: 42-PT-93 Please Help - by dseverson - 05-06-2015, 02:53 PM
RE: 42-PT-93 Please Help - by Nick3092 - 05-06-2015, 03:18 PM
RE: 42-PT-93 Please Help - by dseverson - 05-06-2015, 05:18 PM
RE: 42-PT-93 Please Help - by Radioroslyn - 05-06-2015, 07:01 PM
RE: 42-PT-93 Please Help - by dseverson - 05-07-2015, 11:18 AM
RE: 42-PT-93 Please Help - by dseverson - 05-12-2015, 12:39 AM
RE: 42-PT-93 Please Help - by Radioroslyn - 05-12-2015, 06:15 AM
RE: 42-PT-93 Please Help - by codefox1 - 05-12-2015, 09:07 AM
RE: 42-PT-93 Please Help - by dseverson - 05-12-2015, 12:38 PM
RE: 42-PT-93 Please Help - by Radioroslyn - 05-12-2015, 06:49 PM
RE: 42-PT-93 Please Help - by dseverson - 05-12-2015, 09:21 PM
RE: 42-PT-93 Please Help - by Radioroslyn - 05-12-2015, 09:32 PM
RE: 42-PT-93 Please Help - by dseverson - 05-12-2015, 10:06 PM
RE: 42-PT-93 Please Help - by dseverson - 05-13-2015, 01:13 AM
RE: 42-PT-93 Please Help - by Radioroslyn - 05-13-2015, 04:02 PM
RE: 42-PT-93 Please Help - by dseverson - 05-13-2015, 09:05 PM
RE: 42-PT-93 Please Help - by Radioroslyn - 05-13-2015, 09:24 PM
RE: 42-PT-93 Please Help - by dseverson - 05-13-2015, 10:12 PM
RE: 42-PT-93 Please Help - by Radioroslyn - 05-14-2015, 06:14 AM
RE: 42-PT-93 Please Help - by codefox1 - 05-14-2015, 09:19 AM
RE: 42-PT-93 Please Help - by dseverson - 05-14-2015, 11:08 AM
RE: 42-PT-93 Please Help - by Radioroslyn - 05-14-2015, 06:28 PM
RE: 42-PT-93 Please Help - by dseverson - 05-14-2015, 07:27 PM
RE: 42-PT-93 Please Help - by Radioroslyn - 05-14-2015, 09:12 PM
RE: 42-PT-93 Please Help - by dseverson - 05-14-2015, 09:49 PM
RE: 42-PT-93 Please Help - by dseverson - 05-15-2015, 01:26 AM
RE: 42-PT-93 Please Help - by Radioroslyn - 05-15-2015, 06:43 AM
RE: 42-PT-93 Please Help - by dseverson - 05-15-2015, 01:28 PM
RE: 42-PT-93 Please Help - by dseverson - 05-15-2015, 11:57 PM
RE: 42-PT-93 Please Help - by dseverson - 05-16-2015, 01:15 AM
RE: 42-PT-93 Please Help - by Nick3092 - 05-16-2015, 08:52 AM
RE: 42-PT-93 Please Help - by dseverson - 05-16-2015, 05:52 PM
RE: 42-PT-93 Please Help - by Radioroslyn - 05-16-2015, 06:38 PM
RE: 42-PT-93 Please Help - by dseverson - 05-19-2015, 11:43 AM
RE: 42-PT-93 Please Help - by Nick3092 - 05-19-2015, 01:09 PM
RE: 42-PT-93 Please Help - by dseverson - 05-19-2015, 03:06 PM
RE: 42-PT-93 Please Help - by Radioroslyn - 05-19-2015, 09:09 PM
RE: 42-PT-93 Please Help - by dseverson - 05-30-2015, 01:38 AM
RE: 42-PT-93 Please Help - by Radioroslyn - 05-30-2015, 01:14 PM
RE: 42-PT-93 Please Help - by dseverson - 06-03-2015, 02:29 PM
RE: 42-PT-93 Please Help - by Eliot Ness - 06-03-2015, 03:50 PM
RE: 42-PT-93 Please Help - by dseverson - 06-03-2015, 04:52 PM



Users browsing this thread:
[-]
Recent Posts
Need to purchase some accessories for restoration of my Old Philco Radio
Here is a list of resources found in our online library that you might find useful. Mike's Gobs of Knobs email addres...klondike98 — 01:46 PM
First Radio restoration
Hi Tubeman, Welcome to the Philco Phorum.  Phamily Phriendly Pfun with Phine Pholks Phull of Philco Phacts. (See a p...MrFixr55 — 12:33 PM
First Radio restoration
You could post in the WANTED ADs section here on the Phorum and see if anyone has an RF generator that they want to sell...klondike98 — 11:55 AM
Zenith H725
Good ideas, thank you Arrange and Rich. I have the adhesive aluminum foil already and can try that immediately. More ...EdHolland — 10:18 AM
Graphics for majestic 1050 dial glass.
Murf; I found this thread on the ARF, the first photo has a pretty good view of the dial glass. Regards ArranArran — 01:12 AM
Zenith H725
hello Ed, how about that speacial tape used for ducting it's like foil or how about thin piece of aluminum roof flash...radiorich — 12:19 AM
Zenith H725
Ed; One material that I have seen, but never tried for this was material for making exhaust gaskets, it's similar to ...Arran — 11:42 PM
Zenith H725
I just remembered, I have some hi temp silicone rubber material which could do the trick. Or a piece of FR4 laminate. Th...EdHolland — 08:39 PM
Zenith H725
The PSU filter cap arrived today (thank you USPS!) so I will work on that later. Meanwhile, I have the dial, speaker...EdHolland — 06:42 PM
Philco 610B oscillator wiring
Thanks Terry. After checking my notes I think I recorded about -10v at the 6A7 G4/control grid. The screen grid (G3 &...Tubester — 05:59 PM

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

>