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ID = 20101
Brand: Rectron GmbH; Berlin S59
Tube type:  Full-Wave Rectifier inert gas filled   Power-supply 
Identical to R250_Rectron
Similar Tubes
Normally replaceable-slightly different:
  1701 ; G2340 ; R250
First year 1928 -- Original-techn. papers. Ad from 1928 with description
First Source (s)
Mar.1929 : Funk Bastler 1929, Heft 9

Base Europe 4-Pin B4 (Eu A, E, 4A) 1914
Was used by Radio/TV-reception etc.
Filament Vf 1.8 Volts / If 2.8 Ampere / Direct / Parallel, (AC/DC)

Gemäss Rectron-Anzeige von 1928 (siehe Firmenbilder) leistet die Röhre bei 2 x 340 V eff. Anodenspannung bei 100 mA Belastung über 400 Volt Gleichspannung. Höchstzulässige Belastung 300 mA mit max. Spannung 350 V am Ladekondensator ("Ausgleichskondensator"). Die Röhren haben dann den Pumpstutzen oben, also ein Spitzli.

Literature Arlt's grosser Radiokatalog 1930   p.64
  R250_Rectron: Sammlung GJ
Anonymous 544 Collector
R250_Rectron: W.E.
Wolfgang Eckardt

R250_Rectron: rtt
Michael Schlör

R250_Rectron: RVF-Röhrenbuch-M1,1947
Anonymous 15 Collector

Usage in Models 1= 1929? ; 3= 1929

Quantity of Models at with this tube (valve, valves, valvola, valvole, válvula, lampe):4

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