[Test-Equipment] [Boatanchors] TV-2

[Eric Lemmon]

I have a TV-7A/U tube tester, along with all of the military manuals for it.
As you may know, the TV-7 is a later version of the TV-2.  I just looked in
TM 11-6625-274-35, the Field and Depot Maintenance Manual for the TV-7
testers, and found nothing about a "calibration tube" in the calibration
procedure.  Indeed, the depot calibration requires nothing more than a
Variac and a sensitive multimeter.

Obtain a copy of TM 11-6625-316-35, the Field and Depot Maintenance Manual
for TV-2/U, TV-2A/U, TV-2B/U. and TV-2C/U.  Many such manuals are still
available for download from the Army LOGSA site.

73, Eric Lemmon WB6FLY
 

-----Original Message-----
From: test-equipment-bounces at mailman.qth.net
[mailto:test-equipment-bounces at mailman.qth.net] On Behalf Of Steve Byan
Sent: Thursday, July 15, 2010 10:35 AM
To: Pete Lancashire
Cc: boatanchors at mailman.qth.net; test-equipment at mailman.qth.net
Subject: Re: [Test-Equipment] [Boatanchors] TV-2


On Jul 12, 2010, at 12:47 PM, Pete Lancashire wrote:

> After a surf of the net via Google .. I have a question.
> 
> What does one do now days for calibration tubes / references ?

Check out Alan Douglas's book on vintage tube testers and test equipment. If
I recall correctly, he's got a calibration circuit for Hickok-style tube
testers (TV-2 is of that class). Something like injecting a 5 milliamp 60
cycle current into the plate circuit; I don't really recall the details.

Best regards,
-Steve

-- 
Steve Byan <stevebyan at me.com>
Littleton, MA 01460



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