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ID = 1712
Brand: Philips; Eindhoven (tubes international!); Miniwatt
Tube type:  Triode, vacuum   Universal 
Identical to B2038 = REN1821 = NW180 = NU180 = R2018 = 20C3_Ultron = A2118
Similar Tubes
Normally replaceable-slightly different:
  G752 ; HM20 ; R2018d
Heater different:
First Source (s)
Nov.1931 : -- Original-techn. papers.
Feb.1932 : L'Histoire Singulière du Tube Radio; G. Duperray 2009
Successor Tubes CC2  

Base Europe 5-Pin , B5 (Eu O, F, O5A) 1928 (Codex=F)
Was used by Radio/TV-reception etc.
Filament Vf 20 Volts / If 0.18 Ampere / Indirect / Specified current DC = (Series working)
Information source Babani, International Radio Tube Encyclopaedia   p. 54 & 55
Universal Vade-Mecum, Electron Valves and Semiconductor Devices   Section 141, p. 189
Taschenbuch zum Röhren-Codex 1948/49

B2038: Internet
Miguel Angel Trujillo-Rodriguez
    More ...
7_51.png B2038: Telefunken Werkstattbuch
Wolfgang Bauer

Just Qvigstad
B2038: RVF-Röhrenbuch-M1,1947
Anonymous 15 Collector

More ...
Usage in Models 4= 1931 ; 31= 1932 ; 30= 1933 ; 4= 1934 ; 3= 1935 ; 1= 1936

Quantity of Models at with this tube (valve, valves, valvola, valvole, válvula, lampe):73

Collection of



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