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K40N

Information - Help 
ID = 12779
       
Country:
Great Britain (UK)
Brand: Ever Ready Co. (GB) Ltd.; London
Tube type:  Screen-grid Tetrode   Controlling (mu) 
Identical to K40N

Base Europe 4-Pin (A, 4A, B4, since 1914) (Codex=Er) Top contact with a cap
Filament Vf 2 Volts / If 0.18 Ampere
Literature Taschenbuch zum Röhren-Codex 1948/49   
 
k40n_1.jpg
K40N: R.A.
Raynal Aufils

 
3_1~~3.png
K40N: Telefunken Werkstattbuch
Wolfgang Bauer

 

Usage in Models 1= 1935 ; 1= 1936? ; 1= 1936 ; 1= 1937? ; 1= 1937

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


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