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4BQ7A

Information - Help 
ID = 4405
       
 
   
Tube type:  Double Triode 
Identical to 4BQ7A = 4BZ7
Similar Tubes
Heater different:
  5BQ7A ; 6BQ7A ; 6BS8 ; 6BZ7
Base Noval, 9 pin miniature (USA pico-9) B9A
Was used by Radio/TV-reception etc.
Filament Vf 4.2 Volts / If 0.6 Ampere / Indirect / Specified current AC/DC ~ = (Series working)
Tube prices 1 Tube prices (visible for members only)
Information source Essential Characteristics, GE 1973   
4bq7a_corrected.png
4BQ7A: corrected version
Roland Langfeld
no53_g_13.gif 4BQ7A: RTT Schwandt
Günther Stabe † 19.8.20
More ...
Just Qvigstad 		4bq7a_techdat01.png
4BQ7A: RCA Tube Manual
Peter Hoddow
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Usage in Models 31= 1955? ; 25= 1956?? ; 262= 1956? ; 10= 1956 ; 142= 1957? ; 6= 1957 ; 1= 1958?? ; 13= 1958? ; 6= 1958 ; 8= 1959? ; 3= 1960? ; 7= 1960 ; 1= 1961? ; 2= 1961 ; 3= 1962?? ; 2= 1962 ; 1= 1963
Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):523

Collection of

David Erali (USA)
Peter Pfeiffer (D)
Collection of a member from D
Jose Luis Campayo-Soriano (E)
Hernani Capela (P)
Daniel Ambühl (CH)
Collection of a member from FIN
George Papaiz (CDN)
 
haltron_4bq7a.jpg

4BQ7A
 
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