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A442

Information - Help 
ID = 2457
       
Country:
Netherlands
Brand: Philips; Eindhoven (tubes international!); Miniwatt
Developer: Philips; Eindhoven (tubes international!); Miniwatt 
Tube type:  Screen-grid Tetrode   VHF 
  Ca. 1925 up to 1945 rare.
Identical to A442
Similar Tubes
Normally replaceable-slightly different:
  410SG ; 4B6_Ultron ; A2004 ; A442K ; C150 ; DS1 ; L409 ; OX304 ; R81Ecran ; S4 ; VH300
Other base:
  A442_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
Was used by Radio/TV-reception etc.
Filament Vf 4 Volts / If 0.06 Ampere / Direct / Battery =
Description Also made with UX4 base. 
Dimensions (WHD)
incl. pins / tip
45 x 125 x 35 mm / 1.77 x 4.92 x 1.38 inch
Weight 58 g / 2.05 oz
Literature - - Manufacturers Literature   
Taschenbuch zum Röhren-Codex 1948/49   
  a442.png
  A442: OWN COLLECTION
Loris Bugamelli
 
a442.png
A442: R.O.
Rudolf Osterkamp

 
3_1.png
A442: Telefunken Werkstattbuch
Wolfgang Bauer

 
a442_spec.png
A442: RVF-Röhrenbuch-M1,1947
Anonymous 15 Collector


Usage in Models 3= 1927?? ; 2= 1927? ; 7= 1927 ; 1= 1928?? ; 13= 1928? ; 14= 1928 ; 5= 1929?? ; 1= 1929? ; 16= 1929 ; 4= 1930?? ; 1= 1930? ; 34= 1930 ; 8= 1931 ; 6= 1932 ; 1= 1933? ; 2= 1933 ; 1= 1934 ; 1= 1940??

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):120



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