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Components and Circuits For discussions about component types, alternatives and availability, circuit configurations and modifications etc. Discussions here should be of a general nature and not about specific sets. |
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17th Jun 2011, 2:50 pm | #1 |
Nonode
Join Date: May 2007
Location: Preston, Lancashire, UK.
Posts: 2,511
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GPO VT valve numbers
Has anyone got an equivalents list between GPO VT valve numbers and their normal commercial numbering please?
(Note that the GPO VT valve numbering system was not the same as the American military VT valve numbering system). I have a VT91 I would like to identify. It has a British 5-pin base, and was made by M-O. It has 'VT91' inside the usual M-O oval 'Made & patented in England' logo, and on the opposite side of the bulb G 41 GPO 234 VT No. 91 Any ideas? Many thanks, Andy |
17th Jun 2011, 3:07 pm | #2 |
Heptode
Join Date: Mar 2011
Location: Dorset, UK.
Posts: 521
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Re: GPO VT valve numbers
Hi Andy,
According to 'Service Valve Equivalents' book published by the RSGB in 1962, GPO valve type VT91 is a CV1038 which is either a MHL4 (MOV) or 41MLF (Cossor) and has an english B5 base. Cheers Rich |
17th Jun 2011, 4:16 pm | #4 |
Nonode
Join Date: May 2007
Location: Preston, Lancashire, UK.
Posts: 2,511
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Re: GPO VT valve numbers
Hi Rich and Roy,
Very many thanks! Andy |
17th Jun 2011, 5:55 pm | #5 |
Octode
Join Date: Oct 2008
Location: Littlehampton, West Sussex, UK.
Posts: 1,465
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Re: GPO VT valve numbers
Andy,
I have a specific GPO page or two in one of my data books I can let you have in a few days if no-one else sends it first. Jim |
17th Jun 2011, 6:19 pm | #6 |
Nonode
Join Date: May 2007
Location: Preston, Lancashire, UK.
Posts: 2,511
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Re: GPO VT valve numbers
Jim,
Thanks! i'm sure I have seen one somewhere, but I'm blowed if I can find it. Sometimes one can have just too much information at one's fingertips! Andy |
17th Jun 2011, 8:17 pm | #7 |
Dekatron
Join Date: Jan 2003
Location: Bradford on Avon, Wiltshire, UK.
Posts: 3,310
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Re: GPO VT valve numbers
There's a little "Post office VT numbers" table on the last page of the AVO valve tester book.
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24th Oct 2014, 12:50 pm | #8 |
Nonode
Join Date: Jan 2010
Location: Edinburgh, UK.
Posts: 2,008
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Re: GPO VT valve numbers
Just found this page while looking for something else.
http://frank.pocnet.net/more.html Edit. Also this http://frank.pocnet.net/other/nobr.html Al
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I won't tell you how I discovered that. Last edited by Alistair D; 24th Oct 2014 at 12:56 pm. |