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TB-520-A

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ID = 87207
       
Country:
Japan
Brand: NEC Corporation, Nippon Electric Co. Ltd. (Nippon Denki); Tokyo
Developer: Western Electric Company Inc.; New York (NY) 
Tube type:  Triode, vacuum   Power/Output 
Identical to TB-520-A
Similar Tubes
Normally replaceable-slightly different:
  252A

Base UX-Base (4 Pins (2 thick, USA 1924, UX)
Was used by Radio/TV-reception etc.
Filament Vf 5 Volts / If 2 Ampere / Direct
Description

This tube was designed as a low frequency amplifier.

 
Dimensions (WHD)
incl. pins / tip
x 159 x 67 mm / x 6.26 x 2.64 inch
Weight 78 g / 2.75 oz
Information source -- Collector info (Sammler)   Dawn of Tube Production in Japan - Ohtsuka.
Babani, International Radio Tube Encyclopaedia   p. 30 & 31


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