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ID = 14646
Brand: Dario (tubes) - voir aussi La Radiotechnique
Tube type:  Triode, vacuum   Universal 
Identical to R75
Similar Tubes
Normally replaceable-slightly different:
  A409 ; DZ1508
First year 1928 Saga of the Vacuum Tube, Tyne page 403

Base Europe 4-Pin B4 (Eu A, E, 4A) 1914 (Codex=Eo)
Filament Vf 4 Volts / If 0.06 Ampere / Direct / Battery =
Literature Taschenbuch zum Röhren-Codex 1948/49   
- - Manufacturers Literature   
R75: CA
Christian ADAM

R75: Telefunken Werkstattbuch
Wolfgang Bauer

R75: own collection
Peter den Boer

Usage in Models 1= 1927 ; 1= 1928?? ; 4= 1928 ; 1= 1929? ; 7= 1929

Quantity of Models at with this tube (valve, valves, valvola, valvole, válvula, lampe):14

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