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Re: H.F.Tester (fwd)
---------- Forwarded message ----------
Date: Fri, 21 Feb 1997 19:42:35 -0500 (EST)
From: richard hull <rhull-at-richmond.infi-dot-net>
To: Tesla List <mod1-at-poodle.pupman-dot-com>
Subject: Re: H.F.Tester (fwd)
At 11:18 PM 2/20/97 -0700, you wrote:
>
>
>---------- Forwarded message ----------
>Date: Thu, 20 Feb 1997 23:14:34 -0700
>From: Tesla List <tesla-at-pupman-dot-com>
>To: testla-at-pupman-dot-com
>Subject: H.F.Tester
>
>Subscriber: j.eijkel-at-ic.ac.uk Thu Feb 20 22:56:59 1997
>Date: Thu, 20 Feb 1997 14:23:29 +0000
>From: Jan Eijkel <j.eijkel-at-ic.ac.uk>
>To: tesla-at-pupman-dot-com
>Subject: H.F.Tester
>
>Dear Chip
>
>I have a question. I this the right place to deposit it?
>
>The question is: I got a H.F.Tester (Model T.1 22/250 V.Ac/Dc of
>Edwards Highh Vacuum Ttd., Crawley, Sussex). I think it is a very
>common tesla coil device. Is that right?
>Where can I find information on the device?
>
>Cheers,
>Jan Eijkel
>__________________________________________________________
>Dr.J.C.T.Eijkel
>Imperial College of Science, Technology and Medicine
>Department of Chemistry
>Zeneca/SB Centre for Analytical Sciences
>South Kensington, London SW7 2AY
>United Kingdom
>
>phone +44 171 594 5834
> +44 181 447 1218 (home)
>fax +44 171 594 5833
>e-mail j.eijkel-at-ic.ac.uk
>internet www.ch.ic.ac.uk/manz/
>
>
>Jan,
Yes, the device is a form of Tesla coil often referred to as an Oudin coil.
It is resonant and is used to supply high frequency (few mhz) HV to excite
residual gas atoms in vacuum systems as they are pumped down. It is most
often referred to as a "leak tester" as it is placed near joints in
recalcitrant vacuum systems in search of air leaks. The same device was
also sold in the 20s up to the present day for use in administering a form
of localized diathermic medical treatment.
Richard Hull, TCBOR