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M144

Information - Help 
ID = 14484
       
Country:
Netherlands
Brand: Radio-Record - Röhrenmarke; Holland
Tube type:  Triode, vacuum   Detector 
  Ca. 1925 up to 1945 rare.
Identical to M144
Similar Tubes
Normally replaceable-slightly different:
  A415 ; G410
First year 1927 Tube leaflet collection E.Erb Analysis by original leaflets
First Source (s)
1927 : Radio-Expres, Netherlands

Base Europe 4-Pin (A, 4A, B4, since 1914) (Codex=Eo)
Filament Vf 4 Volts / If 0.1 Ampere / Direct / Battery =
Description Gm 2.0 at Va=200. Amplification factor 14, Internal R=7k. (Radio-Expres 1930) 
Dimensions (WHD)
incl. pins / tip
44 x 103 x 34 mm / 1.73 x 4.06 x 1.34 inch
Weight 44 g / 1.55 oz
Literature Taschenbuch zum Röhren-Codex 1948/49   
Radio-Expres, Netherlands   
- - Manufacturers Literature
 
m144x.jpg
M144: Foto I.M.
Anonymous 557 Collector

 
m144_sock.png
M144: Tabu Röhren-Codex, 1948
Anonymous 15 Collector

 
m144.png
M144: own collection
Peter den Boer



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