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E1232

Information - Help 
ID = 17139
       
Country:
Great Britain (UK)
Brand: MO Valve Co. Ltd.; GB
Developer: MO Valve Co. Ltd.; GB 
Tube type:  Transmitting Triode, air cooled   Text 
Identical to E1232 = 4C27 = NT99
Similar Tubes
Normally replaceable-slightly different:
  CV199
Other class quality (otherwise equal):
  CV92
Successor Tubes NT99   CV1256  

Base Wires Wires only
Was used by Radar
Filament Vf 6 Volts / If 6.5 Ampere / Indirect / Parallel, (AC/DC)
Description Given the MOV company's experimental type number E1232, this tube was one of the first of the "micropup" series of military tubes. It was a pulsed triode and was designed by the Hirst Research Center at the MOV works at Hammersmith, Near Wembley, outside of London. It was made in large quantities by MOV and also some others, including the National Union Tube Corp in the US. Given the British Navy designation NT99, it was mainly used in airborne radar. It was used in the AMES11 600 MHz mobile ground radar by the RAF and in the naval fire control radar type 284 at the same frequency. It was also used in the A1 radar, operating at 200 MHz. While it was a small tube, it could operate at around 50 kw. 
Dimensions (WHD)
incl. pins / tip
x 133 x 52 mm / x 5.24 x 2.05 inch
Weight 197 g / 6.95 oz
Literature Taschenbuch zum Röhren-Codex 1948/49   
The Saga of Marconi Osram Valve   Pages 260 & 265
 
mpup_16.png
E1232: Manufacturer's Literature
Emilio Ciardiello

 
cv1256nt99_1_2.png
E1232: Manufacturer's Literature
Emilio Ciardiello


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