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KT2

Information - Help 
ID = 3039
       
Country:
Great Britain (UK)
Brand: MO Valve Co. Ltd.; GB
Developer: MO Valve Co. Ltd.; GB 
Tube type:  Screen-grid Tetrode   Power/Output 
  Ca. 1925 up to 1945 rare.
Identical to KT2 = CV1118 = VR118 = VT136_GPO
Similar Tubes
Normally replaceable-slightly different:
  PT2
Predecessor Tubes PT2  
Successor Tubes NR39   ARP1  
Base Europe 5-Pin , B5 (Eu O, F, O5A) 1928 (Codex=Foo)
Was used by Radio/TV-reception etc.
Filament Vf 2 Volts / If 0.2 Ampere / Direct / Battery =
Description

The KT2 was a novel type of power tetrode with a large anode diameter and special spacing of the electrodes in a design to improve linearity and efficiency. (KT= Kinkless Tetrode. It was a step in arriving at the alligned electrode system as in the Beam Tetrodes such as the KT66 which retained efficiency at higher power levels.

 
Information source The Saga of Marconi Osram Valve   p. 332
History of the British Radio Valve to 1940   p. 147 & 186
Universal Vade-Mecum, Electron Valves and Semiconductor Devices
Taschenbuch zum Röhren-Codex 1948/49
606_1.png KT2: Telefunken Werkstattbuch
Wolfgang Bauer

Just Qvigstad 		kt2_data.png
KT2: MARCONI RECEIVING VALVES, LONDON, 1938
Jose Casas-Avalos
Usage in Models 1= 1932? ; 1= 1934 ; 1= 1935?? ; 1= 1935? ; 2= 1935 ; 6= 1937 ; 3= 1938? ; 9= 1938 ; 6= 1939 ; 5= 1940 ; 1= 1948 ; 1= 1949
Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):37

Collection of

Frank Cuffe (IRL)
Patrice Zeissloff (F)
Roy Johnson (GB)
Collection of a member from D
 
vr118kt2ph10r.jpg

KT2
 
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