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ID = 15818
Great Britain (UK)
Brand: MO Valve Co. Ltd.; GB
Developer: MO Valve Co. Ltd.; GB 
Tube type:  Triode, vacuum   Power/Output 
Identical to E1368 = CV90 = REL42
Similar Tubes
Normally replaceable-slightly different:

Was used by Military and/or Government
Filament Vf 6.3 Volts / If 0.6 Ampere / Indirect / Specified voltage AND current AC/DC

10 watts dissipation, operates up to 3 GHz. this tube is considered to be the first "Rocket" style UHF triode. The E1368 was an experimental disc seal tube and was the smallest of these. It was designed at the Hirst Research Center at Hammersmith, near Wembley, outside London. This tube has the MOV experimental type number and is refere4d to on page 269 by its military and commercial type numbers CV90 and DET22 respectively.

Dimensions (WHD)
incl. pins / tip
47 x 80 x 20 mm / 1.85 x 3.15 x 0.79 inch
Weight 24 g / 0.85 oz
Information source Taschenbuch zum Röhren-Codex 1948/49   
The Saga of Marconi Osram Valve   pages 269-271
-- Collector info (Sammler)

e1368_so.png E1368: rtt
Anonymous 10 Collector


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