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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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30th Sep 2015, 8:59 am
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#1 |
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Heptode
Join Date: Apr 2014
Location: Wigton, Cumbria, UK.
Posts: 728
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MV 41 valve?
Here's a conundrum. I have picked up a Marconiphone Model 55 portable receiver dated 1929 and in it is a valve which I can find no reference of!
It appears to be a MV 41 (pictured). It's in substitute of the H210 and acts as the leaky grid detector. Has anyone ever heard of it? There's nothing at all on Radio Museum or The National Valve Museum, which really surprised me as that's a first for me! The only other writing on the glass envelope is: VI No. 74 GPO SERIAL No Does anyone know anything about this valve? Thanks Nick |
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1st Oct 2015, 11:45 am
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#2 |
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Octode
Join Date: Jul 2008
Location: Gloucestershire, UK.
Posts: 1,043
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Re: MV 41 valve?
Hello,
Could it be a GPO VT 74 triode? http://www.radiomuseum.org/tubes/tube_vt74_gpo.html The very last Mullard 2V triodes were in glass tubular envelopes similar to yours. I found the attached picture of a earlier Mullard PM2HL on the internet and you can see it has a similar internal structure. Yours, Richard |
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1st Oct 2015, 12:53 pm
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#3 |
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Heptode
Join Date: Apr 2014
Location: Wigton, Cumbria, UK.
Posts: 728
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Re: MV 41 valve?
I think you've solved it Richard. Thanks and well done!
 Nick |
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