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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, B9A
Was used by Radio/TV-reception etc.
Filament Vf 4.2 Volts / If 0.6 Ampere / Indirect / Series, AC/DC
Tube prices 1 Tube prices (visible for members only)
Literature Essential Characteristics, GE 1973   
  4bq7a.png
  4BQ7A: Courtesy Bureau Belper (De Muiderkring, Bussum), Scan Frank Philipse
Karel De Reus †
 
haltron_4bq7a.jpg
4BQ7A: MZ
Anonymous 652 Collector

 
no53_g_13.gif
4BQ7A: RTT Schwandt
Günther Stabe

 
4bq7a_techdat01.png
4BQ7A: RCA Tube Manual
Peter Hoddow


Usage in Models 16= 1955? ; 25= 1956?? ; 259= 1956? ; 13= 1956 ; 87= 1957? ; 6= 1957 ; 6= 1958 ; 8= 1959? ; 1= 1960? ; 7= 1960 ; 1= 1961? ; 1= 1961 ; 2= 1962

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):432


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