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IW3

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ID = 7941
       
Country:
Great Britain (UK)
Brand: Mullard Radio Valve Co. Ltd.;
Tube type:  Full-Wave Vacuum Rectifier   Power-supply 
Identical to IW3
Similar Tubes
Normally replaceable-slightly different:
  1867 ; A11B ; APV4200 ; MU12 ; R2 ; RGN2304 ; SSIH120/350 ; TZ34 ; UU3
Base Europe 4-Pin B4 (Eu A, E, 4A) 1914 (Codex=Em)
Was used by Radio/TV-reception etc.
Filament Vf 4 Volts / If 2.4 Ampere / Half indirect
Description

350v RMS per anode. I<120mA at 350V dc.

Tube listed in Taschenbuch 1948/49 and Rohren Codex 1950 as 1W3

 
Information source History of the British Radio Valve to 1940   p. 149 & 176
- - Manufacturers Literature   
Babani, International Radio Tube Encyclopaedia
Taschenbuch zum Röhren-Codex 1948/49
150_6.png IW3: Telefunken Werkstattbuch
Wolfgang Bauer

Just Qvigstad 		iw3_techdat01.png
IW3: Mullard Valves 1936
Peter Hoddow
Usage in Models 4= 1931 ; 1= 1933?? ; 3= 1933? ; 5= 1933 ; 2= 1934?? ; 1= 1934? ; 13= 1934 ; 4= 1935? ; 24= 1935 ; 1= 1936?? ; 15= 1936? ; 11= 1936 ; 1= 1938?
Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):85

Collection of

Geri Meier (CH)
Danko Tkalec (HR)
 
iw3mullard1_klein.jpg

IW3
 
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