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General Vintage Technology Discussions For general discussions about vintage radio and other vintage electronics etc. |
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20th Feb 2014, 12:37 pm | #1 |
Octode
Join Date: May 2010
Location: Worcestershire, UK.
Posts: 1,880
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Mystery valve or.....?
Can anyone identify this strange looking valve like object?
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20th Feb 2014, 1:29 pm | #2 |
Octode
Join Date: May 2003
Location: Belper Derbyshire
Posts: 1,909
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Re: Mystery valve or.....?
Good afternoon,
I think it is an ionisation vacuum gauge to be fitted onto a high vacuum system and the amount of ionisation between the electrodes gives an indication of the level of vacuum. what does the writing on the envelope say? Christopher Capener
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Interests in the collection and restoration of Tefifon players and 405 line television |
20th Feb 2014, 6:05 pm | #3 |
Hexode
Join Date: Jul 2003
Location: Leeds, West Yorkshire, UK.
Posts: 455
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Re: Mystery valve or.....?
Yes, vacuum gauge. I've seen that type but not got one - they come in a variety of shapes, sizes and function, e.g.:
http://www.tubecollector.org/list.php?L=-g&M=Y&D=Y&H=Gu Jeremy |
20th Feb 2014, 6:20 pm | #4 |
Dekatron
Join Date: Sep 2007
Location: Oxfordshire, UK.
Posts: 4,310
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Re: Mystery valve or.....?
I used to use them. Very nice, until you inadvertently apply a very large magnetic field . Oh well, you live and learn.
Cheers, GJ |
21st Feb 2014, 12:54 am | #5 |
Dekatron
Join Date: Feb 2007
Location: Leominster, Herefordshire, UK.
Posts: 16,527
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Re: Mystery valve or.....?
Do I smell a superconducting magnet somewhere? High vacuum and large magnetic fields?
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....__________ ....|____||__|__\_____ .=.| _---\__|__|_---_|. .........O..Chris....O |
21st Feb 2014, 11:38 am | #6 |
Octode
Join Date: Feb 2006
Location: Bristol, UK.
Posts: 1,030
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Re: Mystery valve or.....?
Sputter ion pumps use powerful magnets to enable them to absorb molecules from a vacuum system.
Malcolm |
21st Feb 2014, 12:31 pm | #7 |
Octode
Join Date: May 2010
Location: Worcestershire, UK.
Posts: 1,880
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Re: Mystery valve or.....?
The info on the envelope is Megatech MI-75p.
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21st Feb 2014, 3:53 pm | #8 | |
Dekatron
Join Date: Sep 2007
Location: Oxfordshire, UK.
Posts: 4,310
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Re: Mystery valve or.....?
This picture gives an albeit sketchy idea of what ion gauges look like in operation. The two yellow-orange patches of light surround the two gauges we were using to monitor the high vacuum in this laser system. (You can see the picture in higher resolution here http://i1180.photobucket.com/albums/...ps88a07228.jpg.)
Quote:
Cheers, GJ |
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21st Feb 2014, 10:54 pm | #9 | |
Octode
Join Date: Jan 2012
Location: Wimbledon, London, UK.
Posts: 1,464
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Re: Mystery valve or.....?
Quote:
Colin. |
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