After previous trip to “trash bin” shop, now it’s the time to test it 😉 So I open my old Knight 600 Tube Tester and fire it up. Picture below shows my Knight 600 testing Amperex 6BQ5/EL84 tube. Not bad!...

Amperex 6BQ5/EL84 from “trash bin” shop 😉 Not bad for some cheap experiment!...