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Old 23rd Jan 2022, 3:50 pm   #1
stevehertz
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Default Identify this Marconi valve please

This is a Marconi B5 base, screened valve. Further than that, can anyone identify it please? You can see on the top that it says 34D41? But that doesn't bring anything up in a search. Thanks.
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Old 23rd Jan 2022, 3:52 pm   #2
yestertech
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Default Re: Identify this Marconi valve please

Could be a D41
The internal structure here looks similar :


http://www.r-type.org/exhib/aaa0577.htm

Andy
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Old 23rd Jan 2022, 3:59 pm   #3
ms660
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Default Re: Identify this Marconi valve please

Marconi D41....Photo on Ebay.

Lawrence.
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Old 23rd Jan 2022, 4:14 pm   #4
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Default Re: Identify this Marconi valve please

Thanks Andy, looks a good candidate. Let's see what others say. I can always drop it into my Mullard valve tester and test it as D41 and see if it wants to play.
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Old 23rd Jan 2022, 4:19 pm   #5
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Default Re: Identify this Marconi valve please

A Marconi metalized D41.

Lawrence.
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Old 23rd Jan 2022, 4:44 pm   #6
stevehertz
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Default Re: Identify this Marconi valve please

Thanks Lawrence.
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Old 6th Feb 2022, 10:54 am   #7
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Default Re: Identify this Marconi valve please

I think we're certain on this one now mods, thanks.
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