[Amps] "Tubes 201" - How Vacuum Tubes Really Work

[Bill Fuqua]

Maybe he meant Angstroms. 10 atmospheres would be almost 150psi.
73
Bill wa4lav


At 07:32 AM 7/24/2006 -0500, S. J. Blackwell wrote:



> >Peter,
> >
> >I don't think he said they absolutely couldn't happen. What I've read about
> >this was that the most vacuum that can be pulled is around 10 atmospheres.
>
>Can someone explain to me what 10 atm of vacuum is? I have always thought in
>terms of absolute pressure. Back in the mid 20th century, when in college,I
>participated in the construction of a mass spectrometer. We used a
>mechanical fore pump and a Hg diffusion pump with a cold trap. The numbers
>we thought seemed approiate were examp: 1x10-12 mmHg pressure. 10atm of
>vacuum does not compute for me. Did I miss something?
>73,
>Sam, W5LU
>
>
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