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: 16 Guest(s)
[-]
Recent Posts
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
1930s Stewart-Warner Tombstone Radio need help identifying model number
UPDATE: I was able to pick up a signal generator on the cheap (amazingly enough) on feebay and I did an IF alignment fol...captainclock1988 — 09:53 AM
Philco 91 Schematic
Hi Rod, The resistor connects to pin 4 and the ungrounded side of block 9. From pin 9 of the RF tube to one side of ...dconant — 09:34 AM
Just got a 49-1613 need to know...everything!
I just found your post. I have this exact same model, and have had it since 1985 when I was 15 years old! I performed a ...MuzzcoVW — 09:11 AM
B&K 1077B no video
Hello Tim, I would if it's a leaky Capacitor So are all 3 of those B- voltages low then ? Sincerely Richardradiorich — 01:55 AM
B&K 1077B no video
I found a schematic and think I have the problem traced down to the minus power supply. I have very low voltages that go...TV MAN — 12:41 AM

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

>