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E441

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ID = 2503
       
Country:
Netherlands
Brand: Philips; Eindhoven (tubes international!); Miniwatt
Tube type:  Dual-Grid Tetrode   Frequency converter 
Identical to E441 = U4100D = DG4101 = DW1 = B2_SIF = 4A15_Ultron = RS4141 = RS4341
Similar Tubes
Normally replaceable-slightly different:
  Dn44 ; E441N ; REN704d ; TM4
Other base:
  E441_2S
First year Nov.1928 -- Original-techn. papers.

Base Europe 5-Pin (O5A, B5) (Codex=Fa / sp) Sidecontact
Filament Vf 4 Volts / If 1 Ampere / Indirect / Parallel, (AC/DC)
Description

redecessors: none, Successors / Nachfolger: E448, RENS1224, X4122 By its construction this tube is a space- charging-grid tetrode, but should be used as self oscillating frequency converter. The oscillator feedback is applied to grid 1, the input signal to grid 2. Its amplification is low and not to control, the oscillator voltage is closely coupled to the input circuit..

 
Text in other languages (may differ)
Literature Taschenbuch zum Röhren-Codex 1948/49   
 
e441_philips_1.jpg
E441: Eigene Sammlung
Aldo Patriarca

 
6_3.png
E441: Telefunken Werkstattbuch
Wolfgang Bauer

 
e441_techdat01.png
E441: Philips Röhren Daten 1933
Peter Hoddow


Usage in Models 1= 1929 ; 2= 1930 ; 1= 1931? ; 1= 1932?? ; 1= 1932 ; 1= 1933 ; 1= 1934?

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):8


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