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Help finding Magnavox Portable Record Player Schematic

Tubejunke

Tubejunke

Super Member
Hello all! I am in desperate need of a schematic for this 1950s portable phone. This old thing used to be able to disturb the neighbors with Jimi Hendrix and Les Zeppelin when I found it second hand in the early 1980s!

No big questions thus far. I just need a schematic. It hasn't been used since about 1990 and I'm doing a number of things. I have a cardiac and bunches of capacitor leakage testers that I've restored, so the schematic thus far is the hardest part of getting it back up to snuff.

Thanks!
 

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Tubejunke said:
Hello all! I am in desperate need of a schematic for this 1950s portable phone. This old thing used to be able to disturb the neighbors with Jimi Hendrix and Les Zeppelin when I found it second hand in the early 1980s!

No big questions thus far. I just need a schematic. It hasn't been used since about 1990 and I'm doing a number of things. I have a cardiac and bunches of capacitor leakage testers that I've restored, so the schematic thus far is the hardest part of getting it back up to snuff.

Thanks!
Click to expand...
It didn't pick up this attachment.
 

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There are only 2 sets of numbers on the amp. The first is printed ib large font:
5 50 1

Below that is: AMP 141 AA as best I can tell. The latter is partially faded or rubbed off.

I can find no numbers stamped into metal. The unit serial # is 324035 as seen on a tag on the bottom of the case.
 
I think we need a better look at the "AMP" number on the back. Magnavox typically showed up in SAMS photofacts using that chassis "AMP" number, but I see listings for AMP139 and AMP142, but nothing for a 141. No listings of service literature for any TP255* models either.
There is a YouTube video of a similar model, the TP255MA but it's not much help.

What are the particular symptoms? Usually a schematic is not needed- capacitors, tubes, resistors are all marked, and if you are just restoring the original circuit replacing typical problem parts (like electrolytics and paper capacitors) will get you there. Is there hum? Low distorted volume?
 
I ran into the same results, nothing on the model number or that chassis. the Google misinformation bot seems to think its similar to the 142, I suppose because of the number, but just at a glance I can tell you that is not so.
 
Tubejunke said:
Hello all! I am in desperate need of a schematic for this 1950s portable phone. This old thing used to be able to disturb the neighbors with Jimi Hendrix and Les Zeppelin when I found it second hand in the early 1980s!

Thanks!
Click to expand...
7254a9fe-218a-485d-bbfe-3ed4dba019c8.jpg

What a drag! Someone marked out the Model number. I'm guessing it was manufactured on 5-1-1950.

d45294c7-912e-46bf-b683-343827942168.jpg
 
Well, I had to remove the twin speakers & wooden mounting board to get a more direct shot. I'm going with AMP 441 now that I can see better. I'll probably find it through normal searches now.

I'm surprised. I thought this thing would be familiar to some folks here. It's been years since I've come around. I've come a long way from where I was back when I believe I was trying to get a 1964 Zenith 21" round tube color set going that somebody gave me.

It's playing like a new one right now in my living room after needed repairs to the resistor under the HV rectifier socket at that point. I don't believe in shotgun recap jobs unless totally necessary. It hinders an aspiring electronics tech all the way back to just being a guy with some soldering skills that understands polarity.

Beam me up YouTube. I wanna mess with Grandpa's tubes. If it fits in the socket; try it! Plug & play y'all! Lol!

But seriously....

Thanks a lot gang for the replies. I'm gonna fish around and see what my new AMP# will bring to this reality.

P.S. I realize once again what a cool page AudioKarma truly is!
 
Tubejunke said:
Well, I had to remove the twin speakers & wooden mounting board to get a more direct shot. I'm going with AMP 441 now that I can see better. I'll probably find it through normal searches now.

I'm surprised. I thought this thing would be familiar to some folks here. It's been years since I've come around. I've come a long way from where I was back when I believe I was trying to get a 1964 Zenith 21" round tube color set going that somebody gave me.

It's playing like a new one right now in my living room after needed repairs to the resistor under the HV rectifier socket at that point. I don't believe in shotgun recap jobs unless totally necessary. It hinders an aspiring electronics tech all the way back to just being a guy with some soldering skills that understands polarity.

Beam me up YouTube. I wanna mess with Grandpa's tubes. If it fits in the socket; try it! Plug & play y'all! Lol!

But seriously....

Thanks a lot gang for the replies. I'm gonna fish around and see what my new AMP# will bring to this reality.

P.S. I realize once again what a cool page AudioKarma truly is!
Click to expand...
 
img_20260831_090234852-jpg.3827443

BTW, that 6V6GT (darkened top) is Tung-Sol made (USA). (322042) prolly made the 42nd week of 1940 (50?). A most excellent tube!

:thumbsup:
 
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