Please click your language flag. Bitte Sprachflagge klicken.


Information - Help 
ID = 18994
Great Britain (UK)
Tube type:  Triode, vacuum   Universal 
Identical to LT1
Similar Tubes
Other shape (e.g. bulb type):
First year Mar.1921 History of the British Radio Valve to 1940 Thrower page 36
First Source (s)
1920 : Saga of the Vacuum Tube, Tyne Tyne, page 380
Jun.1920 : First examples of the valve
Successor Tubes DER  

Base Europe 4-Pin B4 (Eu A, E, 4A) 1914
Filament Vf 1.8 Volts / If 0.4 Ampere / Direct / Battery =

The first British dull emitter valve. Thrower: "Initial samples of these were made in June 1920 and the first production quantities were produced in March 1921."

Text in other languages (may differ)
Tube prices 1 Tube prices (visible for members only)
LT1: KoBi
Konrad Birkner † 12.08.2014

LT1: Fin Stewart
Fin Stewart


from Just Qvigstad

Usage in Models 1= 1922

Quantity of Models at with this tube (valve, valves, valvola, valvole, válvula, lampe):1

You reach this tube or valve page from a search after clicking the "tubes" tab or by clicking a tube on a radio model page. You will find thousands of tubes or valves with interesting links. You even can look up radio models with a certain tube line up. [rmxtube-en]