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ID = 57017
United States of America (USA)
Brand: Penta Laboratories; Chatsworth (CA)
Developer: Eimac (brand name) 
Tube type:  Beam Power Tube   VHF 
Identical to PL-4-1000A = PL-8166 = 4-1000A

Base Giant 5 pin (ESEC B5F) Top contact with a cap.
Was used by Transmittertube (Radio)
Filament Vf 7.5 Volts / If 21 Ampere / Direct

This is just the 4-1000A, with the prefix of the manufacturer: PL = Penta Labs

Dimensions (WHD)
incl. pins / tip
x 156 x 90 mm / x 6.14 x 3.54 inch
Weight 185 g / 6.53 oz
Information source - - Manufacturers Literature   Catalog dated October 1963

giant_5_pin_medium~~3.png PL-4-1000A: Fin Stewart
Fin Stewart

Just Qvigstad
PL-4-1000A: Manufacturer's Literature
Anonymous 15 Collector


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