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ID = 7121
Brand: Rectron GmbH; Berlin S59
Tube type:  Half-Wave Rectifier, gasfilled   Power-supply 
Identical to R2000
First year 1930 Tube leaflet collection E.Erb Analysis by original leaflets
First Source (s)
Aug.1930 : Funk Bastler 1930, Heft 35

Base Edison, size not known Top contact with a cap
Filament Vf 2.5 Volts / If 4 Ampere / Direct
Description Anodenwechselspannung min. 500V; max. 3500V; Ia mittel: 0,1A. 
Literature Taschenbuch zum Röhren-Codex 1948/49   
R2000: rtt
Michael Schlör

R2000: own collection
Peter den Boer

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