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Re: LF: Pure off-topic: old tubes

To: [email protected]
Subject: Re: LF: Pure off-topic: old tubes
From: "C. Groeger" <[email protected]>
Date: Mon, 07 Jul 2014 14:22:00 +0200
Reply-to: [email protected]
Sender: [email protected]
Hi petr!
You may ask Eddi, dj6ux.
He has a lot of literature about tubes.
You can contact him every afternoon on 7037 kcs.

Christian Groeger

Petr Maly <[email protected]> schrieb:

>Hello all
>I apology for the off-topic. However I know that this group is attended by 
>very experienced gents, mainly from the UK.
>I found these two tubes in the junk, see the attachment. I spent quite a while 
>to search the whole Internet for some specs, in vain.
>They are very similar to QB3/300, or TESLA’s RE125, same size, same socket. 
>The only visible difference is the shape and material of the anode. 
>I think the number 55 in the designation could possibly be the anode 
>The labels are:
>STC 4B/55
>ITT 4B/55/B
>By some lucky chance does anybody have any information about them?
>Thanks, 73, Petr, OK1FIG

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