[R-390] Testing tubes r392

[Randy and Sherry Guttery]

On 8/6/2012 2:56 AM, sigmapert wrote:
> The most authentic tube tester for military vacuum tube gear undoubtedly is the TV-7D/U.
>
I have a different opinion on this - while the TV-7 series 
is indeed a fine tester, and period "correct" for much 
military vacuum gear; it is by no means the "most" on 
several counts.  In my opinion - the TV-3B is far more 
collectible as a period piece - and certainly as competent 
as a TV-7 for most early military tube gear. With it's 
built-in Multi-meter and "hidden power cord compartment" - 
it's "coolness" factor is almost off the scale.  When it 
comes to competency - the TV-10 is (IMHO) far more useful 
than a TV-7 - as it does not require a "chart" to test a 
tube - it can be set up using a tube manual and since is 
reads directly in umhos -it's readings are directly useful 
(the TV-7 series reads in 0-120 "quality" -- requiring extra 
work to determine an actual reading). The TV-10 can also be 
used to "beam" a tube (heavy current blast - to blow crud 
off the elements and expose fresh emitter areas).

Just my .02

-- 
randy guttery

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