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ID = 4478
Tube type:  Double Triode 
Identical to 5BQ7A
Similar Tubes
Heater different:
  4BQ7A ; 4BZ7 ; 6BQ7A ; 6BS8 ; 6BZ7

Base Noval, 9 pin miniature (USA pico-9) B9A
Was used by Radio/TV-reception etc.
Filament Vf 5.6 Volts / If 0.45 Ampere / Indirect / Specified current AC/DC ~ = (Series working)
Tube prices 2 Tube prices (visible for members only)
Information source Essential Characteristics, GE 1973   

5BQ7A: corrected version
Roland Langfeld

no53_g_17.gif 5BQ7A: RTT Schwandt
Günther Stabe † 19.8.20

Just Qvigstad
5BQ7A: RCA Tube Manual
Peter Hoddow

More ...
Usage in Models 20= 1957? ; 5= 1958? ; 1= 1958

Quantity of Models at with this tube (valve, valves, valvola, valvole, válvula, lampe):26

Collection of

Collection of a member from D


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