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M1004

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ID = 12799
       
Country:
Netherlands
Brand: Radio-Record - Röhrenmarke; Holland
Developer: Radio-Record - Röhrenmarke; Holland 
Tube type:  Screen-grid Tetrode   Power/Output 
  Ca. 1925 up to 1945 rare.
Identical to M1004
Similar Tubes
Normally replaceable-slightly different:
  B443 ; L506 ; PP415 ; RES164d
First Source (s)
1930 : Radio-Expres, Netherlands

Base Europe 5-Pin (O5A, B5) (Codex=Fo)
Filament Vf 4 Volts / If 0.22 Ampere / Direct / Battery = /
Description Gm=1.2 at Va=200. Amplification factor 200. (Radio-Expres 1930) To avoid the Philips patent of the penthode, Tungsram and Radio-Record made tetrode's with a penthode characteristic, This is neither a screen drid tetrode, nor a penthode. See basing diagram. Also made with B4 base with sidecontact. 
Dimensions (WHD)
incl. pins / tip
45 x 114 x 34 mm / 1.77 x 4.49 x 1.34 inch
Weight 40 g / 1.41 oz
Literature Taschenbuch zum Röhren-Codex 1948/49   
Radio-Expres, Netherlands   
- - Manufacturers Literature
 
m1004.jpg
M1004
Peter den Boer

 
m1004_sock.png
M1004: Tabu Röhren-Codex, 1948
Anonymous 15 Collector

 
m1004data.png
M1004: own collection
Peter den Boer



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