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ID = 46143
United States of America (USA)
Brand: Machlett Labs (tubes); Springdale, CT
Tube type:  Transmitting Triode, air cooled   UHF 
Identical to ML-381 = 381_UHF

Was used by Military and/or Government
Filament Vf 6 Volts / If 1 Ampere / Half indirect

381 is a planar triode, oil-can shape, designed for use as pulsed oscillator, frequency multiplier or class C amplifier in transmitting services up to 3000MHz.
Machlett code for 381 type.

Information source - - Manufacturers Literature   
Tube Lore (II)   p. 157

2c39aaaaa.png ML-381: Manufacturer's Literature
Emilio Ciardiello


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