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Pen4DD

Information - Help 
ID = 11454
       
Country:
Great Britain (UK)
Brand: Mullard Radio Valve Co. Ltd.;
Tube type:  Double Diode-Pentode   Power/Output 
Identical to Pen4DD = PEN4DD = CV519
Similar Tubes
Other characteristic (electr. data):
  DO42
Other base:
  ABL1
Other base and other heater:
  EBL1
First Source (s)
1937 : -- Collector info (Sammler)

Base British-7-Pin, old (M7A) (Codex=Nb)
Was used by Radio/TV-reception etc.
Filament Vf 4 Volts / If 2.2 Ampere / Indirect / Parallel, (AC/DC)
Literature Taschenbuch zum Röhren-Codex 1948/49   
 
mullard_pen4dd.jpg
Pen4DD: Mullard Pen4DD
Howard Craven

 
164_2.png
Pen4DD: Telefunken Werkstattbuch
Wolfgang Bauer

 
pen4dd_mullard_data_01.png
Pen4DD: Mullard-original papers
Bernd Staginnus


Usage in Models 1= 1937? ; 12= 1937 ; 13= 1938

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


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