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ID = 2247
Brand: Valvo GmbH, Radioröhrenfabrik; Hamburg
Tube type:  Triode, vacuum   Power/Output 
Identical to LK4200 = F410
Similar Tubes
Normally replaceable-slightly different:
  K480 ; PX25
First year 1930 Tube leaflet collection E.Erb Analysis by original leaflets

Base Europe 4-Pin B4 (Eu A, E, 4A) 1914 (Codex=Eo)
Was used by Radio/TV-reception etc.
Filament Vf 4 Volts / If 2 Ampere / Direct / Specified voltage AC/DC
Tube prices 7 Tube prices (visible for members only)
Information source Babani, International Radio Tube Encyclopaedia   p. 116 & 117
Universal Vade-Mecum, Electron Valves and Semiconductor Devices   Section 114, p. 149
Taschenbuch zum Röhren-Codex 1948/49

1_48.png LK4200: Telefunken Werkstattbuch
Wolfgang Bauer

Just Qvigstad
LK4200: Valvo-Röhren-Daten 1934
Jacob Roschy

Usage in Models 3= 1934 ; 3= 1935 ; 4= 1936 ; 1= 1937 ; 1= 1938

Quantity of Models at with this tube (valve, valves, valvola, valvole, válvula, lampe):12

Collection of



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