Re: Unknown tube: 7943 = BT145A = TQ 2/3

• To: tesla-at-pupman-dot-com
• Subject: Re: Unknown tube: 7943 = BT145A = TQ 2/3
• From: Kristian Ukkonen <kukkonen-at-cc.hut.fi> (by way of Terry Fritz <terryf-at-verinet-dot-com>)
• Date: Sat, 28 Nov 1998 12:58:11 -0700
• Approved: terryf-at-verinet-dot-com

Tesla List wrote:
> This is a 4-pin tube (2*filament, 1*grid, 1*NC, visually),
> with anode cap. The text on the tube:
> 
> English Electric Valve Co. Ltd.
> Made in England
> BT 145 A
> (TQ 2/3)
> 7943

It is a mercury thyrathron, 2kV 40A. 

  Kristian Ukkonen.

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