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E442 Info
Country:  Netherlands      Brand:  Philips; - Eindhoven; Netherlands 
  Tube type:  Screen-grid Tetrode   RF/IF-Stage 
Tube ID = 1689
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Identical to E442 = NC4 = H4100D = RS4142
Similar Tubes AS494 (can normally be replaced - small diff'ce)   DW6 (can normally be replaced - small diff'ce)   S4150 (can normally be replaced - small diff'ce)   MS4 (can normally be replaced - small diff'ce)   S412N (can normally be replaced - small diff'ce)   S430N (can normally be replaced - small diff'ce)   A4GAF (can normally be replaced - small diff'ce)   TE42 (can normally be replaced - small diff'ce)   J4091 (can normally be replaced - small diff'ce)   E442_4pin (other base)  
First Series   1928 Tube leaflet collection E.Erb Analysis by original leaflets
First Source (s) Aug.1928 : -- Original-techn. papers.
1928 : Saga of the Vacuumtube, Tyne p.422

Base Europe 5-Pin (O5A, B5) (Codex=Fc) Top contact screw type
Was used by Radio/TV-reception etc.
Filament -: Indirect / -: Parallel, (AC/DC) / If: 1 Ampere / Vf 4 Volts /
Description Siehe die Unterschiede zur E442S (Kolben und elektrische Daten) - und auch die 4-Stift-Ausführung der E442. 
Text in other languages (may differ)
Tube prices 1 Tube prices (visible for members only)
Literature Taschenbuch zum Röhren-Codex 1948/49   

  e442.gif
  ficha de valvulas
Getulio Jimenez-Gomez
e442_01.jpg
Thomas Lebeth
 
9_10.png
Telefunken Werkstattbuch
Wolfgang Bauer

 
e442_spec.png
RVF-Röhrenbuch-M1,1947
Anonymous 15 Collector

Usage in Models   1= 1927 ; 4= 1928 ; 1= 1929? ; 15= 1929 ; 4= 1930? ; 19= 1930 ; 31= 1931 ; 1= 1932? ; 26= 1932 ; 4= 1933? ; 5= 1933 ;
Number of Models with this tube   111
No further Information for

E442    

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