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B424

Information - Help 
ID = 1669
       
Country:
Netherlands
Brand: Philips; Eindhoven (tubes international!); Miniwatt
Developer: Philips; Eindhoven (tubes international!); Miniwatt 
Tube type:  Triode, vacuum   Audio Frequency 
Identical to B424 = A430 = PM3D
Similar Tubes
Normally replaceable-slightly different:
  2-424 ; 4A10_Triode ; 4A15_TKD ; 4B2_Ultron ; 4D ; 4DC ; G424 ; RO4320 ; TB24_DarioTriode ; V424
Heater different:
  4H08
Other base:
  B424_UX4
Multiple differences or of other kind:
  B424S
First year 1927 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 0.1 Ampere / Direct / Battery =
Tube prices 1 Tube prices (visible for members only)
Information source L'ABCDaire des lampes de TSF des jeunes années   p. 40
Babani, International Radio Tube Encyclopaedia   p. 54 & 55
Universal Vade-Mecum, Electron Valves and Semiconductor Devices
Taschenbuch zum Röhren-Codex 1948/49
1_19.png B424: Telefunken Werkstattbuch
Wolfgang Bauer

Just Qvigstad 		b424_spec.png
B424: RVF-Röhrenbuch-M1,1947
Anonymous 15 Collector
More ...
Usage in Models 4= 1927 ; 2= 1928?? ; 1= 1928? ; 3= 1928 ; 1= 1929?? ; 1= 1929? ; 1= 1930?? ; 7= 1930 ; 1= 1931 ; 5= 1932 ; 1= 1933? ; 2= 1933 ; 1= 1934? ; 1= 1934 ; 1= 1935
Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):32

Collection of

Thomas Lebeth (A)
Peter den Boer (NL)
Collection of a member from E
Georges Werts (B)
Leif Ekornrod (N)
Tomasz Szczesniak (PL)
Rodolfo Gaston Wenceslao Nasasta (RA)
Horst Schneider (D)
Hartmut Völler (D)
 
ph_b424_.jpg

B424
 

Variants

Special selected at a filament current of 100 mA. Other shape glass.
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