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ID = 15879
United States of America (USA)
Brand: Amperex; New York
Tube type:  Transmitting Triode, air cooled   Power/Output 
Identical to HF120 = 211B
Similar Tubes
Normally replaceable-slightly different:
Predecessor Tubes HF240  

Base Jumbo 4-pin bayonet (1918)
Was used by Transmittertube (Radio)
Filament Vf 10 Volts / If 3.2 Ampere / Direct / Specified voltage AC/DC

Thoriated-tungsten filament; 75 to 100W max plate dissipation, mu 12, 15MHz full ratings operating frequency. Applications include audio amplifiers or modulators and class B or C RF stages. Standard Jumbo 4-pin bayonet base.

Weight 227 g / 8.01 oz
Information source Babani, International Radio Tube Encyclopaedia   P. 204 & 205
- - Manufacturers Literature   
Taschenbuch zum Röhren-Codex 1948/49
HF120: Manufacturer's Literature
Emilio Ciardiello

HF120: Manufacturer's Literature
Emilio Ciardiello

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