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ID = 83145
United States of America (USA)
Brand: Penta Laboratories; Chatsworth (CA)
Developer: Heintz & Kaufman Ltd. (Gammatron); San Francisco, CA 
Tube type:  Transmitting Triode, air cooled   VHF 
Identical to PL-254w
Similar Tubes
Normally replaceable-slightly different:

Base Jumbo 4-pin bayonet (1918) Sidecontact and top contact.
Was used by Radio/TV-reception etc.
Filament Vf 5 Volts / If 7.5 Ampere / Direct / Specified voltage AND current AC/DC

This tube is a general purpose medium mu triode with a radiation coled anode. The special design permits high voltage operation and unusual VHF efficiency. It can be used as a class B or C power amplifier.

Dimensions (WHD)
incl. pins / tip
x 184 x 62 mm / x 7.24 x 2.44 inch
Weight 190 g / 6.70 oz
Information source Tube Lore (II)   p.217
- - Manufacturers Literature   Catalog dated October 1963

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