Tube tester...anyone own their own?

I might have made one in Jr. High Electric Shop back in the 1960’s.

TV-7 D/U and sent to Daniel Nelson in Arizona for updates and calibration.  If you can find the original military headphone set for noise testing, that is a big plus.

Also have a Western Electric KS-15874-L2 otherwise known as a Hickok Cardmatic.

The TV-7 D/U still appears on E-Bay quite regularly.

I had 6 at one time back when I lived in my home in NY. You could say I was obsessed. Included were the Western Electric KS-15750, Triplett 3444, Hickok 539C, TV-2 C/U, TV- 7/DU and  Hickok 752A. They were all stellar performers. The Hickok 752A was the easiest to use because you could check both sections of a tube with just a flip of a switch (you didn't have to change all the settings). My favorite was the Hickok 539C. 
I sold them all but my TV- 7/DU making my retirement move into a condo. I kept the TV- 7D/U because of its small compact size, and it's very rugged. 

I have a Eico 667. It's not good for power tube matching. It can check for weak tubes shorts and leakage. It's an inexpensive go nogo tester.

Maximatcher II preamp tube tester.  Easy to use and repeatable.  For power tubes, I just buy new tubes instead of spending the money on a tester.  My amp uses KT-120 tubes. For the price of a tester I can get a complete new set of matched tubes.