[Hallicrafters] Tube testers

[Jon & Jan]

My old reliable: the AN/TV7_U ... it served us well in the Navy.  Now,it
does, too. If any of you are familiar with the old diesel submarines, the
test equipment often got stored in the bilges ... it needed to be reliable.

However, there is something good to be said of using the tube's host
equipment as the checker, becuz of unique biasing schemes, etc.

Jon  KØFOP


-----Original Message-----
From: hallicrafters-bounces at mailman.qth.net
[mailto:hallicrafters-bounces at mailman.qth.net] On Behalf Of Glen Zook
Sent: Saturday, January 25, 2014 9:59 AM
To: hallicrafters at mailman.qth.net
Subject: [Hallicrafters] Tube testers

The best tube checker in the world is the unit itself!  Over the decades, I
have found numerous tubes that check "good" on a tube tester that absolutely
would not work in the unit and numerous tubes that check "bad" in a tube
tester that worked fine in the unit.

The problem is that a normal tube tester only tests tubes under very narrow
parameters.

I remember reading, back in the 1950s, about a tube tester that, I believe,
General Electric had made to test tubes under numerous conditions which the
tube could experience in actual use.  The quoted price tag was close to
$3,000,000 and that was in 1950s dollars!

Personally, I have at least 4-different tube testers including a Hickok
6000.  The 6000 actually has 2-different plugin sets of tube sockets and
2-different roll charts which allow testing of tubes from 01A to
compactrons.  However, I seldom use any of those tube testers and usually
just substitute tubes in the actual unit.
 
Glen, K9STH


Website:  http://k9sth.com
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