I scrounged up a B&K "Dyna-Quik Mod. 500 tube tester today. Has the
510 daughter board inside the lid. Case is not bad, inside looks
pretty good. sockets look excellent, and none are broken. Ball chain
that holds the lid upright is broken. There is one tube base adapter

Best offer plus fair shipping from 91763

I can shoot a pic if anyone wants. No documentation, but there is a
clear and clean chart inside the lid.
"Pax Americana is a philosophy. Hardly an empire.
Making sure other people play nice and dont kill each other (and us)
off in job lots is hardly empire building, particularly when you give
them self determination under "play nice" rules.

Think of it as having your older brother knock the **** out of you
for torturing the cat." Gunner