[Amps] Ion Pumps

[gdaught6 at stanford.edu]

On 25 Apr 2007 at 16:17, Mike Saculla wrote:

< snip >
 
> I once overheard someone on the air say that vacuum tubes 
> have a vacuum of about 70 Torr (mm of mercury), which is not "high" vacuum. 
> But I don't know how accurate that 70 Torr figure is.
> 
> I work with high vacuum systems, not vacuum tubes, so I am not sure of those 
> details.

70 Torr is certainly NOT high vacuum.  I'd be very surprised if the 
pressure inside a good vacuum tube isn't more like 10^-7 Torr or so!

But I could be wrong (for a change  8>)

73,

George T. Daughters, K6GT