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R220

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ID = 486
       
Country:
Germany
Brand: Rectron GmbH; Berlin S59
Tube type:  Full-Wave Rectifier gas filled   Power-supply 
Identical to R220 = 1702
Similar Tubes
Normally replaceable-slightly different:
  1002 ; G2200
First year 1927 Tube leaflet collection E.Erb Analysis by original leaflets
First Source (s)
Feb.1929 : Funk Bastler 1929, Heft 8

Base Europe 4-Pin (A, 4A, B4, since 1914) (Codex=Eo)
Filament Vf 1.8 Volts / If 2.8 Ampere / Direct
Tube prices 1 Tube prices (visible for members only)
Literature Taschenbuch zum Röhren-Codex 1948/49   
  d_rectron_1928_schgaltung_r220.png
  R220: Sammlung GJ
Anonymous 544 Collector
 
r220_053r.jpg
R220: Collection JR
Jacob Roschy

 
r220_sock.png
R220: RVF-Röhrenbuch-M1,1947
Anonymous 15 Collector

 
r220_spec.png
R220: RVF-Röhrenbuch-M1,1947
Anonymous 15 Collector


Usage in Models 4= 1928 ; 3= 1929? ; 4= 1929 ; 2= 1930 ; 1= 1931

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


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