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 Post subject: Weston TV-4/AU
PostPosted: Jul Fri 21, 2017 5:25 am 
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Joined: Aug Thu 25, 2016 10:03 pm
Posts: 27
Location: Houston, Texas 77072
I have this Weston(?) TV-4A/U tube tester which is part of a US Navy - Test-Tool Set - AN/USM-3A and really need a schematic for it.
No tube in it. I've found a manual and tube data but no schematic. Any one have a lead on one?

Also looking for the headphone and band for it. Everything else seems to be complete except for the tools. All major components are there.

One more thing, the case says "Radio Frequency Labs". Is this TV-4 made by them or by Weston? It does have a Weston meter. Maybe just packaged by Radio Frequency Labs?

Thanks,
Ron


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 Post subject: Re: Weston TV-4/AU
PostPosted: Jul Fri 21, 2017 2:50 pm 
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Joined: Jan Tue 31, 2012 1:55 am
Posts: 4216
Location: Mountains of Mourne. Ireland.
TV-4 A/U emission tester.

Image

http://www.radiomuseum.org/r/weston_tv_ ... ester.html


Weston TV-4 emission tester.
https://books.google.co.uk/books/conten ... yHA&w=1280
from: Tube Testers and Classic Electronic Test Gear by Alan Douglas.

Alan once described this model as being quirky!

Technician's handbook AN / USM-3 (no schematic).
http://www.mrcgwest.org/mrcgdownloads/Misc/ANUSM3.pdf

Greg.

Edit:
From 2008 https://vintage-radio.net/forum/showthread.php?t=27731
I've sent you Phil's email address via PM (private message).


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 Post subject: Re: Weston TV-4/AU
PostPosted: Jul Fri 21, 2017 5:26 pm 
Member

Joined: Aug Thu 25, 2016 10:03 pm
Posts: 27
Location: Houston, Texas 77072
Thanks Greg,
I have sent Phil an email regarding the schematic and parts too.

I have downloaded the same books you linked to but yeah, no schematic. I can't even find out what the number of the tube is that's missing !

Regards,

Ron Taylor
Houston, TX


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 Post subject: Re: Weston TV-4/AU
PostPosted: Jul Fri 21, 2017 9:54 pm 
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Joined: Jan Tue 31, 2012 1:55 am
Posts: 4216
Location: Mountains of Mourne. Ireland.
The tube in the tester is a...

3A4 Power Amplifier Pentode.
Data: http://www.r-type.org/pdfs/3a4.pdf

pdf-page-eight of NAVSHIPS 91688
http://skywaves.ar88.net/mil/USM-3A/Section_1.PDF
pdf looks incomplete. hi hi

As the 3A4 and the other tubes for the signal tracer have been given reference designations V-101 and V-201 V-202 V-203 this may be where the elusive schematic once was?


The above NAVSHIPS pdf was hosted by Richard Allan here...
http://www.richardsradios.co.uk/testtoolset.html

Perhaps he has the schematic?

Greg.


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 Post subject: Re: Weston TV-4/AU
PostPosted: Mar Mon 05, 2018 5:50 pm 
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Joined: Mar Mon 05, 2018 10:19 am
Posts: 2
Hi,
I'm still in search of a full manual for my AN/USM-3A.
I have the "section 1" but it is incomplete.
The full manual seems to be the NAVSHIPS 91688 or the NAVSHIPS 91146
Does anybody know where can I find it?
A free PDF is obviously preferred, but I'll pay a reasonable fee for it.
Thanks,
Paolo from Italy


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