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DW4

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ID = 7743
       
Country:
Great Britain (UK)
Brand: Mullard Radio Valve Co. Ltd.;
Tube type:  Full-Wave Vacuum Rectifier   Power-supply 
Identical to DW4 = 1561 = RGN2004
Similar Tubes
Normally replaceable-slightly different:
  RB42 ; RV120/500 ; SSW120/500 ; W10 ; W120/500
First Source (s)
22.Nov.1935 : Wireless World (The), London (WW, 79)
Base Europe 4-Pin B4 (Eu A, E, 4A) 1914 (Codex=Eo)
Was used by Radio/TV-reception etc.
Filament Vf 4 Volts / If 2 Ampere / Direct
Information source History of the British Radio Valve to 1940   p. 149 &169
Babani, International Radio Tube Encyclopaedia   p. 274 & 275
Universal Vade-Mecum, Electron Valves and Semiconductor Devices
Taschenbuch zum Röhren-Codex 1948/49
17_74.png DW4: Telefunken Werkstattbuch
Wolfgang Bauer

Just Qvigstad 		dw4_techdat01.png
DW4: Mullard Valves 1936
Peter Hoddow
Usage in Models 1= 1932 ; 1= 1933? ; 2= 1934? ; 1= 1935
Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):5
 
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