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HD23

Information - Help 
ID = 14285
       
Country:
Great Britain (UK)
Brand: MO Valve Co. Ltd.; GB
Tube type:  Double Diode-Triode 
Identical to HD23
First year Aug.1938 The Wireless World, London (WW, 79) show report

Base Europe 5-Pin (O5A, B5) (Codex=Fp)
Filament Vf 2 Volts / If 0.15 Ampere / Direct / Battery =
Description Va<150, Gm=1.4mA/V at Ia =1.7mA 
Literature Taschenbuch zum Röhren-Codex 1948/49   
 
hd23_rr.jpg
HD23: RR
Reinhard Riek

 
s_412_g_2.gif
HD23: W.Sprick: Austausch-Röhren-Lexikon 1947
Günther Stabe

 
hd23_data.png
HD23: MARCONI RECEIVING VALVES, LONDON, 1938
Jose Casas-Avalos


Usage in Models 1= 1938 ; 5= 1939

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):6


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