On 2022-11-02, David Wright <deb...@lionunicorn.co.uk> wrote: > > To be fair, most vacuum tubes aren't bathed in helium, but air, and > then only at a one atmosphere differential pressure. A gas cylinder > might be as high as 500 atmospheres.
I always thought vacuum tubes weren't filled with anything but a "high vacuum" and electrodes. Gas-filled tubes, on the other hand, are filled with a gas. Seems fair to me. > And vacuum tubes do contain a getter to deal with outgassing, which > will help mitigate slight leaks. > > Cheers, > David. > > --
