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Measuring Vaccum with electrical discharge

Posted: Thu May 09, 2019 9:12 pm
by John Futter
Measuring high vacuum with an electrical discharge
From a very old book written in 1945
enjoy
20190510091503083.pdf
(119.88 KiB) Downloaded 228 times

Re: Measuring Vaccum with electrical discharge

Posted: Fri May 10, 2019 6:41 am
by Rex Allers
Nice reference, John. The old original ones are often the best.

Do you have the title and author of the whole document?

Re: Measuring Vaccum with electrical discharge

Posted: Fri May 10, 2019 9:03 am
by Cai Arcos
Rex Allers wrote:
Fri May 10, 2019 6:41 am
Nice reference, John. The old original ones are often the best.

Do you have the title and author of the whole document?
Rex:
"Manual of Vacuum Practice", by L.H Martin.
I found it in Amazon. If everything goes well, I will order one soon:
https://www.amazon.com/Manual-Vacuum-Pr ... B001FT0NUC
EDIT:
John:
I see in the text that there is a reference to Appendix 12, which should cointain tabulated tables for tube characteristics. ¿Could you please post it?
I would be extremely grateful.

Re: Measuring Vaccum with electrical discharge

Posted: Fri May 10, 2019 9:40 am
by John Futter
Cai
Its the weekend here now and I left the book at work where the wonderful photocopier that copies to PDF is
i'll try to do it on Monday for you

Re: Measuring Vaccum with electrical discharge

Posted: Fri May 10, 2019 10:03 am
by Cai Arcos
John Futter wrote:
Fri May 10, 2019 9:40 am
Cai
Its the weekend here now and I left the book at work where the wonderful photocopier that copies to PDF is
i'll try to do it on Monday for you
Obviously, there is no rush whatsoever.
Thank you very much! I have been searching info on this type of vacuum gauge for about a month with very little success until now.

Re: Measuring Vaccum with electrical discharge

Posted: Fri May 10, 2019 6:43 pm
by Richard Hull
Cai, please avoid quoting. It is just not done here. We are intelligent people and can remember posts within a single thread. We don't need to re-read over and over again.

If you find any quoting in the vast collection of thousands of posts here, you will find that at some point, we have asked the new person to avoid quoting.

Richard

Re: Measuring Vaccum with electrical discharge

Posted: Fri May 10, 2019 8:17 pm
by Cai Arcos
Richard:
You are correct. I did it by impulse from other forums, sorry. I will not make the same mistake again.

Re: Measuring Vaccum with electrical discharge

Posted: Sun May 12, 2019 9:23 pm
by John Futter
appendix 12 plus more!!
appendix12.pdf
(119.55 KiB) Downloaded 182 times

Re: Measuring Vaccum with electrical discharge

Posted: Mon May 13, 2019 2:53 pm
by Cai Arcos
Books are not made like this anymore....
I bet a new book would provide a reference to some obscure paper containing this data without actually posting it and assuming the reader can access it...
Thanks for posting it!