helium leak detector used to test vacuum tube feedthroughs

When making vacuum tubes or any other glass-metal seal that has to be hermetic, you have to test it in some way. The helium leak detector is the most sensitive device for doing this. Here we see how the leak detector is used to test vacuum tube feedthroughs that have been newly made.

Видео helium leak detector used to test vacuum tube feedthroughs канала glasslinger