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ID = 1357
Brand: Valvo GmbH, Radioröhrenfabrik; Hamburg
Tube type:  Triode, vacuum   Audio Frequency 
Identical to W4080 = E438
Similar Tubes
Normally replaceable-slightly different:
  AR4101 ; REN1004 ; W307_Marathon
First year 1929 -- Collector info (Sammler)

Base Europe 5-Pin , B5 (Eu O, F, O5A) 1928 (Codex=F)
Was used by Radio/TV-reception etc.
Filament Vf 4 Volts / If 0.8 Ampere / Indirect / Specified voltage AC/DC
Tube prices 1 Tube prices (visible for members only)
Information source Babani, International Radio Tube Encyclopaedia   p. 164 & 165
Universal Vade-Mecum, Electron Valves and Semiconductor Devices   Section 99, p. 133
Taschenbuch zum Röhren-Codex 1948/49

7_45.png W4080: Telefunken Werkstattbuch
Wolfgang Bauer

Just Qvigstad
W4080: Valvo Daten Heft 1930
Trev Levick

Usage in Models 2= 1929 ; 4= 1930 ; 3= 1931 ; 1= 1932 ; 1= 1933 ; 3= 1934

Quantity of Models at with this tube (valve, valves, valvola, valvole, válvula, lampe):14

Collection of



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