[Boatanchors] [Test-Equipment] TV-2

[Michael]

-----Original Message-----
From: boatanchors-bounces at mailman.qth.net
[mailto:boatanchors-bounces at mailman.qth.net] On Behalf Of Carl
> The calibration tube came out of the audiophool world as a way to dig into
the wallets.

Kind of like gold plated wall outlets.

> About 2 years ago several of us in the US and Canada with Hickok 752A's 
> shipped 2 widely different power level tubes around to check and compare 
> calibration. The results were surprisingly close and many were in
extremely 
> close agreement. The tubes were a NOS 6L6 and I believe a 6J5.

I forget what the second tube is but apparently one *has* to be an RCA 6L6,
tested on a particular tube tester, which changes from vendor to vendor
since each claims to have the only accurate one (I think all are Hickok
models.), to ensure it falls dead on spec according to the tube manuals.
Which vintage of which manual isn't specified and the words "typical" and
"average" seem now to mean something entirely new.  

> Most of us also used them to check accuracy of other testers. I also have
a 
> I-177, TV-7C/U and Jackson 648S that I had overhauled according to
military 
> manuals and Internet data. I have 4-5 other military and civilian Hickok 
> design testers that are awaiting their turn.

I now have two Jackson 648 versions, per your suggestion.  How did you find
they compare to the Hickoks?

Best regards,
 
Michael, WH7HG BL01xh
http://www.nationalmssociety.org/chapters/NTH/index.aspx 
http://wh7hg.blogspot.com/ 
http://kludges-other-blog.blogspot.com 
Hiki Nô!