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Dn1004

Information - Help 
ID = 11175
       
Country:
Netherlands
Brand: Radio-Record - Röhrenmarke; Holland
Tube type:  Vacuum Pentode   Power/Output 
  Ca. 1925 up to 1945 rare.
Identical to Dn1004
Similar Tubes
Normally replaceable-slightly different:
  E443N ; PP4100 ; RES664d
First Source (s)
1930 : Radio-Expres, Netherlands

Base Europe 4-Pin B4 (Eu A, E, 4A) 1914 (Codex=Eoo)
Was used by Radio/TV-reception etc.
Filament Vf 4 Volts / If 1 Ampere / Direct / Specified voltage AC/DC
Description

Gm=2.2 at Va=200. R int=45k. (Radio-Expres 1930) To avoid the Philips penthode patent, Tungsram and Radio Record (and others)made tetrodes with a penthode characteristic. These tubes are listed as penthodes in tube manuals but are not. The use of the top connection is optional.

 
Dimensions (WHD)
incl. pins / tip
52 x 148 x 34 mm / 2.05 x 5.83 x 1.34 inch
Weight 82 g / 2.89 oz
Information source Taschenbuch zum Röhren-Codex 1948/49   
Radio-Expres, Netherlands   
- - Manufacturers Literature
 
dn1004record1.jpg
Dn1004: W.E.
Wolfgang Eckardt

 
r_7.png
Dn1004
Peter den Boer

 
dn1004.png
Dn1004: own collection
Peter den Boer


from Just Qvigstad

Collection of a member from D

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