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Unknown tube: 7943 = BT145A = TQ 2/3



Hello,

I found some triode-looking tubes for really cheap
price at a army surplus store. However, any 'web
based tube data index didn't recognize the type.
So, anyone out there with the specs? 

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

I DOES look hefty enough to be a nice tube for building
a tube TC, especially as the price is very reasonable. 
That is, if it is a triode, with reasonable specs.

Thanks!

  Kristian Ukkonen.