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F331A

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ID = 83523
       
Country:
United States of America (USA)
Brand: Federal Radio Corp. / Federal Telephone & Telegraph Co.; Buffalo, NY
Developer: RCA (RCA Victor Co. Inc.); New York (NY) 
Tube type:  Transmitting Tetrode, air cooled   Power/Output 
Identical to F331A
Similar Tubes
Normally replaceable-slightly different:
  861

Base Pin-and-blade jumbo (3 contacts) Sidecontact and top contact.
Was used by Transmittertube (Radio)
Filament Direct
Dimensions (WHD)
incl. pins / tip
x 435 x 252 mm / x 17.13 x 9.92 inch
Information source Tube Lore (II)   p.78 & 154

861_sock~~3.png F331A: Fin Stewart
Fin Stewart


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