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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   RF/IF-Stage 
  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 ; RO4142 ; S4 ; VH300
Other base:
  A442_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 0.06 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
Information source - - Manufacturers Literature   
L'ABCDaire des lampes de TSF des jeunes années   p. 24
-- Collector info (Sammler)
Taschenbuch zum Röhren-Codex 1948/49
a442.png
A442: OWN COLLECTION
Loris Bugamelli
3_1.png A442: Telefunken Werkstattbuch
Wolfgang Bauer

Just Qvigstad 		a442_spec.png
A442: RVF-Röhrenbuch-M1,1947
Anonymous 15 Collector
More ...
Usage in Models 3= 1927?? ; 2= 1927? ; 9= 1927 ; 1= 1928?? ; 14= 1928? ; 17= 1928 ; 5= 1929?? ; 3= 1929? ; 16= 1929 ; 4= 1930?? ; 2= 1930? ; 36= 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):131
Museum "Technik-Museum.ch"

Collection of

Christian ADAM (F)
John Koster (NL)
Andreas Schulz (D)
Rudolf Osterkamp (D)
Wolfgang Bauer (A)
Hartmut Völler (D)
Thomas Lebeth (A)
Francisc VISKY (RO)
Patrice Zeissloff (F)
 
a442.png

A442
 
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