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1861

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ID = 7508
       
Country:
Netherlands
Brand: Philips; Eindhoven (tubes international!); Miniwatt
Tube type:  Full-Wave Vacuum Rectifier   Power-supply 
Identical to 1861
Similar Tubes
Other base and other heater:
  AZ4
First year 1933 Tube leaflet collection E.Erb Analysis by original leaflets
First Source (s)
22.Nov.1935 : Wireless World (The), London (WW, 79)
Successor Tubes 1938   AZ4  

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
Information source - - Manufacturers Literature   
Babani, International Radio Tube Encyclopaedia   p. 258 & 259
Universal Vade-Mecum, Electron Valves and Semiconductor Devices
Taschenbuch zum Röhren-Codex 1948/49

1861_so.png 1861: rtt
Anonymous 10 Collector


Just Qvigstad

Collection of

 
1861.jpg

 

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