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R21

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ID = 29151
       
Country:
Germany
Brand: Rectron GmbH; Berlin S59
Tube type:  Full-Wave Rectifier gas filled   Power-supply 
Identical to R21 = R21H
Similar Tubes
Normally replaceable-slightly different:
  1700 ; G2185

Base Europe 4-Pin (A, 4A, B4, since 1914)
Filament Vf 1.8 Volts / If 1.8 Ampere / Direct
Description Codex gibt fälschlich 4 V Heizung an 
Literature Taschenbuch zum Röhren-Codex 1948/49   
Röhren-Taschen-Tabelle, (Franzis RTT)   
 
r21_small.jpg
R21: dl2rby R.Weiner
Robert Weiner

 
r21h_sock~~1.png
R21: RVF-Röhrenbuch-M1,1947
Anonymous 15 Collector

 
gasgefulltedatasmall.png
R21: own collection
Peter den Boer


Usage in Models 1= 1928?? ; 2= 1929 ; 1= 1930?

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

Collection of a member from D

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