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B442

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ID = 1668
       
Country:
Netherlands
Brand: Philips; Eindhoven (tubes international!); Miniwatt
Tube type:  Screen-grid Tetrode 
Identical to B442 = R81 = DZ2 = TB42 = H410D = SC4
Similar Tubes
Normally replaceable-slightly different:
  2-442 ; 4AC ; 4GAF ; A4GAE ; B442/A ; DS1_Thermion ; DS2 ; G442 ; L409 ; S100 ; S409 ; S410 ; SX406 ; TMEC ; V442
Heater different:
  B442_SERIE_100
Other base:
  B442/O ; B442M ; B442_UX4
First year 1927 Tube leaflet collection E.Erb Analysis by original leaflets

Base Europe 4-Pin (A, 4A, B4, since 1914) (Codex=Er) Top contact screw type
Filament Vf 4 Volts / If 0.1 Ampere / Direct / Battery =
Tube prices 3 Tube prices (visible for members only)
Literature Taschenbuch zum Röhren-Codex 1948/49   
 
b442_web.jpg
B442: CA
Christian ADAM

 
3_5.png
B442: Telefunken Werkstattbuch
Wolfgang Bauer

 
b442_spec.png
B442: RVF-Röhrenbuch-M1,1947
Anonymous 15 Collector


Usage in Models 1= 1927?? ; 1= 1927? ; 2= 1927 ; 2= 1928 ; 4= 1929 ; 1= 1930?? ; 2= 1930? ; 11= 1930 ; 11= 1931 ; 5= 1932 ; 1= 1933? ; 1= 1933 ; 1= 1935

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):43



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