The oldest tool in my shop (other than me)

I was looking for something in my shop and I stumbled across the oldest piece of test equipment I own - it's almost as old as I am. It's a B&K model 707 "Dyna-Jet" tube tester

This is the fist time I've had it out in over 20 years. Any bets if it still works?
Here's a copy of the manual if you want to play along at home: http://pacifictv.ca/schematics/bk707opinstructions.pdf

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This isn't the only way to do it.
It's probably not the best way to do it.

But it's how I do it.

Видео The oldest tool in my shop (other than me) канала pileofstuff