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H2

Information - Help 
ID = 14243
       
Country:
Great Britain (UK)
Brand:
Tube type:  Triode, vacuum   Audio Frequency 
Identical to H2 = CV2977 = 210RC = 210RC_Cossor
Similar Tubes
Normally replaceable-slightly different:
  H210 ; H210_Hivac ; PM2HL ; e330
Other class quality (otherwise equal):
  E458
First Source (s)
22.Nov.1935 : Wireless World (The), London (WW, 79)

Base Europe 4-Pin B4 (Eu A, E, 4A) 1914 (Codex=Eo)
Was used by Radio/TV-reception etc.
Filament Vf 2 Volts / If 0.1 Ampere / Direct / Battery =
Description

High-gain triode, mu 35, 1.0mA/V.

 
Information source History of the British Radio Valve to 1940   p. 151
- - Manufacturers Literature   
Taschenbuch zum Röhren-Codex 1948/49

s_397_g_7.gif H2: W.Sprick: Austausch-Röhren-Lexikon 1947
Günther Stabe † 19.8.20


Just Qvigstad
h.2_osram.png
H2: osram wireless guide 1931
Giuseppe Antonio Tusini

More ...
Usage in Models 1= 1925?? ; 1= 1930?? ; 1= 1930? ; 1= 1932? ; 3= 1933 ; 1= 1934 ; 1= 9999

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):9

Collection of

 
h2_marconi.jpg

H2
 

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