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U18

Information - Help 
ID = 8261
       
Country:
Great Britain (UK)
Brand: MO Valve Co. Ltd.; GB
Tube type:  Full-Wave Vacuum Rectifier   Power-supply 
Identical to U18 = NU12 = 45IU
First Source (s)
Sep.1936 : Wireless World (The), London (WW, 79) p273
Successor Tubes U18/20  

Base Europe 4-Pin B4 (Eu A, E, 4A) 1914 (Codex=Eo)
Filament Vf 4 Volts / If 3.75 Ampere / Direct
Description Manufacturer's data (1938) states heater 3.75A.
Va <500 rms. Ia <250mA mean.
1958 GEC data states Heater current 2.8A approximately.
(Price 1.1EUR in 1938) 
Information source Taschenbuch zum Röhren-Codex 1948/49   
- - Manufacturers Literature   
 
u18.jpg
U18: KS
Ken Shellberg

 
17_89.png
U18: Telefunken Werkstattbuch
Wolfgang Bauer

 
u18_data.png
U18: MARCONI RECEIVING VALVES, LONDON, 1938
Jose Casas-Avalos


from Just Qvigstad

Usage in Models 1= 1946?

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):1


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