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B442

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ID = 1668
       
Country:
Netherlands
Brand: Philips; Eindhoven (tubes international!); Miniwatt
Developer: Philips; Eindhoven (tubes international!); Miniwatt 
Tube type:  Screen-grid Tetrode   RF/IF-Stage 
Identical to B442 = R81 = DZ2 = TB42 = SC4 = H410D
Similar Tubes
Normally replaceable-slightly different:
  2-442 ; 4AC ; 4GAF ; A4GAE ; B442/A ; B442S ; DS1_Thermion ; DS2 ; G442 ; L409 ; S100 ; S409 ; S410 ; SX406 ; TMEC ; V442
Other characteristic (electr. data):
  LH406D
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 B4 (Eu A, E, 4A) 1914 (Codex=Er) Top contact screw type.
Was used by Radio/TV-reception etc.
Filament Vf 4 Volts / If 0.1 Ampere / Direct / Battery =
Description

This tube also listed in Babani

 
Tube prices 3 Tube prices (visible for members only)
Information source -- Collector info (Sammler)   
L'ABCDaire des lampes de TSF des jeunes années   p. 42
Universal Vade-Mecum, Electron Valves and Semiconductor Devices
Taschenbuch zum Röhren-Codex 1948/49
3_5.png B442: Telefunken Werkstattbuch
Wolfgang Bauer
More ...
Just Qvigstad 		b442_spec.png
B442: RVF-Röhrenbuch-M1,1947
Anonymous 15 Collector
More ...
Usage in Models 1= 1927?? ; 1= 1927? ; 2= 1927 ; 2= 1928 ; 1= 1929? ; 4= 1929 ; 1= 1930?? ; 2= 1930? ; 12= 1930 ; 11= 1931 ; 5= 1932 ; 1= 1933? ; 1= 1933 ; 1= 1934? ; 1= 1935
Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):46
Museum "Telekom Historik Bochum"

Collection of

Josef Mahrle (A)
Peter Kovacs (CH)
Christian ADAM (F)
Georges Werts (B)
Danko Tkalec (HR)
Rodolfo Gaston Wenceslao Nasasta (RA)
Hartmut Völler (D)
Oskar Elm (D)
Ottmar Rollmann (D)
Harald Giese (D)
Peter Pfeiffer (D)
 
b442_web.jpg

B442
 
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