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ID = 57011
United States of America (USA)
Brand: Penta Laboratories; Chatsworth (CA)
Developer: Eimac (brand name) 
Tube type:  Transmitting Tetrode, air cooled   VHF 
Identical to PL-4-400A = 4-400A

Base TRANSMITTING & Power-TUBES/VALVES in gen Top contact with a cap.
Was used by Transmittertube (Radio)
Filament Vf 5 Volts / If 14.5 Ampere / Direct
Dimensions (WHD)
incl. pins / tip
x 150 x 87 mm / x 5.91 x 3.43 inch
Weight 190 g / 6.70 oz
Information source - - Manufacturers Literature   Catalog October 1963

4400a_sock~~1.png PL-4-400A: Fin Stewart
Fin Stewart

PL-4-400A: Manufacturer's Literature
Anonymous 15 Collector


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