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FW4/500

Information - Help 
ID = 7804
       
Country:
Great Britain (UK)
Brand: Mullard Radio Valve Co. Ltd.;
Tube type:  Full-Wave Vacuum Rectifier   Power-supply 
Identical to FW4/500 = NU12 = 4/100BU
Similar Tubes
Other characteristic (electr. data):
  CV31

Base Europe 4-Pin B4 (Eu A, E, 4A) 1914 (Codex=Eo)
Filament Vf 4 Volts / If 3 Ampere / Direct
Description

Mullard etch code 1130

 
Information source Taschenbuch zum Röhren-Codex 1948/49   
 
fw4_500a.jpg
FW4/500: own tube collection
Hannu Alho

 
17_75.png
FW4/500: Telefunken Werkstattbuch
Wolfgang Bauer

 
fw4500_mullard_data_01.png
FW4/500: Mullard-original papers
Bernd Staginnus


from Just Qvigstad

Usage in Models 1= 1940? ; 3= 1948 ; 1= 1949

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):5


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