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PenA4

Information - Help 
ID = 11479
       
Country:
Great Britain (UK)
Brand: Mullard Radio Valve Co. Ltd.;
Tube type:  Vacuum Pentode   Power/Output 
Identical to PenA4 = 7A3 = OP42
Similar Tubes
Normally replaceable-slightly different:
  42MP/Pen ; A70D ; AC2/Pen ; N41 ; PT4 ; Pen4VB
Other base and data slightly different:
  AL3

Base British-7-Pin, old (M7A) (Codex=Ndo)
Was used by Radio/TV-reception etc.
Filament Vf 4 Volts / If 2 Ampere / Indirect / Parallel, (AC/DC)
Tube prices 1 Tube prices (visible for members only)
Literature Taschenbuch zum Röhren-Codex 1948/49   
 
pena4.jpg
PenA4: FC
Frank Cuffe

 
pena4_sock.png
PenA4: Tabu Röhren-Codex, 1948
Anonymous 15 Collector

 
pena4_techdat01.png
PenA4: Mullard Valves 1936
Peter Hoddow


Usage in Models 2= 1935?? ; 3= 1936? ; 37= 1936 ; 5= 1937? ; 20= 1937 ; 1= 1938? ; 18= 1938 ; 3= 1939

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):89



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