[Milsurplus] tv-7 tube tester

[WA5CAB at cs.com]

Joe,

First, your string should be something like TV-7/U....TV-7B/U + TV-7D/U, as 
that's the model range.  I heard a rumour once that a few TV-7C/U were 
built but never saw what I would consider valid confirmation.

Why do you ask?  From a user's standpoint, the answer is basically "none".  
I have been using a TV-7/U for more than 20 years and never found any 
reason to wish I had a later model.  It worked fine when I bought it in 1990 and 
was still working last week.  I think someone once said that the D had some 
ferrite beads added to a few leads but I never had any parasitic 
oscillations occur with any tubes I've tested with the base model.  Otherwise, they 
were built by several different contractors and there are a few minor 
mechanical differences because of that.

I have the Long Number manual set available as reprints (individually or as 
a group) and have a couple of extra originals of the first Short Number 
manual from 1953.  Or if all you need is schematics, I would sell the Long 
Number schematic pack by itself.

In a message dated 3/31/2011 7:22:44 PM Central Daylight Time, 
jzonfrelli at comcast.net writes: 
> I need some help with the tv-7 line of tube testers. 
> 
> Does anyone know what the differences are between 
> 
> tv-7/au. . . tv-7/du? 
> 
> Thanks 
> 
> Joe 
> 
> AF0W 

Robert Downs - Houston
wa5cab dot com (Web Store)
MVPA 9480