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ID = 2236
Brand: Telefunken Deutschland (TFK), (Gesellschaft für drahtlose Telegraphie Telefunken mbH
Tube type:  Half-Wave Vacuum Rectifier 
Identical to RGN1304 = 505 = 412SU = TV105 = V1 = KL75302 = V495
Similar Tubes
Normally replaceable-slightly different:
  EG410 ; EG4100 ; R104
First year 1928 Tube leaflet collection E.Erb Analysis by original leaflets
First Source (s)
Feb.1929 : Funk Bastler # 9

Base Europe 4-Pin B4 (Eu A, E, 4A) 1914 (Codex=Eo)
Filament Vf 4 Volts / If 1 Ampere / Direct

Identical valves of other manufacturers: Philips 505 / Valvo G495 and: Cossor 412SU, Dario TV105, Mullard DU4, Triotron G450, Tungsram V495, Visseaux V1.
See: «Radios von gestern» page 243.

Text in other languages (may differ)
Tube prices 3 Tube prices (visible for members only)
Information source Taschenbuch zum Röhren-Codex 1948/49   
RGN1304: TreLe
Trev Levick

More ...
RGN1304: Telefunken Werkstattbuch
Wolfgang Bauer

RGN1304: Datenblatt Telefunken
Wolfgang Bauer

from Just Qvigstad

Usage in Models 2= 1928 ; 2= 1929 ; 1= 1930? ; 6= 1930 ; 4= 1931 ; 1= 1932? ; 1= 1932

Quantity of Models at with this tube (valve, valves, valvola, valvole, válvula, lampe):17

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