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Old 23rd May 2020, 8:37 am   #1
Terry295
Triode
 
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Default Help Identifying Valve Please

Hi All

I am trying to identify a valve or its equivalent so that I may test it. I have searched all my AVO VCM and cross reference documents without luck and searches on the web have also drawn a blank.

As can be seen from the attached picture it has the markings either 418TH or 8TH (not sure which is correct) and also the RAF stores No. 10E/27. The valve has a B7 base and I guess is from the late '30s.

Any help in identify this or an equivalent would be most appreciated, thank you

Terry C (ZL4TC)
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Old 23rd May 2020, 9:00 am   #2
valvecollector
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Default Re: Help Identifying Valve Please

10E/27 is a 41STH
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Old 23rd May 2020, 9:06 am   #3
Terry295
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Default Re: Help Identifying Valve Please

Quote:
Originally Posted by valvecollector View Post
10E/27 is a 41STH
Thank you very much

TC
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Old 23rd May 2020, 9:06 am   #4
jonnybear
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Default Re: Help Identifying Valve Please

Triode hexode frequency changer equivalent to 20A1 A36A AC/TH1 CV2508 TH4 X41M.
John
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Old 23rd May 2020, 9:29 am   #5
Amraduk
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Default Re: Help Identifying Valve Please

Quote:
Originally Posted by valvecollector View Post
10E/27 is a 41STH
Looks to me like 418TH that's printed on the valve.

Regards,

Dave.
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