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HK257B

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ID = 11254
       
Country:
United States of America (USA)
Brand: Heintz & Kaufman Ltd. (Gammatron); San Francisco, CA
Tube type:  Transmitting Tube, Pentode, air cooled   Power/Output 
Identical to HK257B
Similar Tubes
Normally replaceable-slightly different:
  4E27A/5-125B

Base (Codex=My) Top contact with a cap.
Was used by Transmittertube (Radio)
Filament Vf 5 Volts / If 7.5 Ampere / Direct
Description

Heintz & Kaufman transmitting pentode equivalent to 4E27A.

 
Dimensions (WHD)
incl. pins / tip
x 157 x 70 mm / x 6.18 x 2.76 inch
Information source Tube Lore (II)   p. 218
Tube Lore (I)   
Taschenbuch zum Röhren-Codex 1948/49

 

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