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LT1

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

Base Europe 4-Pin (A, 4A, B4, since 1914)
Filament Vf 1.8 Volts / If 0.4 Ampere / Direct / Battery =
Description The first British dull emitter valve. Thrower: "Initial samples of these werde made in June 1920 and the first production quantities were produced in March 1921." 
Text in other languages (may differ)
 
lt_1.jpg
LT1: KoBi
Konrad Birkner † 12.08.2014

 

Usage in Models 1= 1922

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

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