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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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Old 14th Oct 2019, 10:41 am   #1
Granthar
Diode
 
Join Date: Oct 2019
Location: Chichester, West Sussex, UK.
Posts: 1
Default Can anyone identify this Valve? [4212 or V1505]

I have a large valve, see photos.
The CD is for size

The only marking on it is a hand written inscription saying CQ24 inside the valve
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Old 14th Oct 2019, 11:26 am   #2
turretslug
Nonode
 
Join Date: Nov 2011
Location: Surrey, UK.
Posts: 2,910
Default Re: Can anyone identify this Valve?

Maybe a late version of the 4212 power triode (maybe -H with its direct internal connections, certainly later than -E), made by STC and others, based on the US-originated 212?

Look after it, it may be worth a pretty penny!

Aha, found this; https://vintage-radio.net/forum/showthread.php?t=40716
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Old 14th Oct 2019, 11:28 am   #3
barrymagrec
Heptode
 
Join Date: Dec 2017
Location: Morden, Surrey, UK.
Posts: 566
Default Re: Can anyone identify this Valve?

Possibly an 845 or something similar.
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Old 14th Oct 2019, 11:36 am   #4
Malcolm G6ANZ
Heptode
 
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Join Date: Feb 2006
Location: Bristol, UK.
Posts: 576
Default Re: Can anyone identify this Valve?

I've got one the same!Mine is an Edisawn V1505

Malcolm
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