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ID = 80469
United States of America (USA)
Brand: DeForest-Tubes
Tube type:  Transmitting Triode, air cooled   Power/Output 
Identical to 571_deforest

Base SPECIAL TUBEBASE in general Sidecontact and top contact.
Was used by Transmittertube (Radio)
Filament Vf 11 Volts / If 10 Ampere / Direct / Parallel, (AC/DC)

500 watt RF power amplifier. Maximum plate voltage 4000,, current 350mA. Used in telephony and telegraphy.

Dimensions (WHD)
incl. pins / tip
x 432 x mm / x 17.01 x inch
Information source Radio Engineering   August 1930, page 17.
571_deforest: Electronics, April 1931
Achim Dassow

571_deforest: Electronics, April 1931
Achim Dassow

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