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ID = 31392
Great Britain (UK)
Brand: Mullard Radio Valve Co. Ltd.;
Tube type:  Transmitting Tetrode, air cooled   VHF 
Identical to QV2-350A = YL1340 = 8321 = 4CX350A
Similar Tubes
Heater different:
  4CX350F ; QV2-350F

Base SPECIAL TUBEBASE in general Top contact with a cap.
Filament Vf 6 Volts / If 3.2 Ampere / Indirect / Specified voltage AC/DC
Description Pa <250W 
Weight 113 g / 3.99 oz

qv2350a_so1.png QV2-350A: ARRL Handbook 1972
Anonymous 10 Collector

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QV2-350A: Manufacturer's Literature
Emilio Ciardiello

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