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ID = 57019
United States of America (USA)
Developer: Heintz & Kaufman Ltd. (Gammatron); San Francisco, CA 
Tube type:  Transmitting Triode, air cooled   VHF 
Identical to 254W = 254
Similar Tubes
Normally replaceable-slightly different:

Base Jumbo 4-pin bayonet (1918) Sidecontact and top contact.
Was used by Transmittertube (Radio)
Filament Vf 5 Volts / If 7.5 Ampere / Direct

The 254W is a 100 watt dissipation triode originally made by Heintz and Kaufman with a mu of 25 and a maximum frequency of 175 MHz for full ratings. Early versions had an open anode and no shield around the press.

Similar tubes were later made by:

Lewis and Kaufman (LK-254)

Eimac (254W)

Penta Labs (PL-254W)

Vacuum Tube Prod. Co. (254W)

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. 209 & 217

jumbo_ts~~6.png 254W: Fin Stewart
Fin Stewart

Just Qvigstad
254W: Manufacturer's Literature
Anonymous 15 Collector

Collection of



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