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DD207

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ID = 6623
       
Country:
Great Britain (UK)
Brand: Mazda = Valve (Tube) brand GB (see also France)
Tube type:  Double Diode 
Identical to DD207

Base Europe 4-Pin B4 (Eu A, E, 4A) 1914 (Codex=Eo)
Filament Vf 2 Volts / If 0.75 Ampere / Direct / Battery =
Information source Taschenbuch zum Röhren-Codex 1948/49   
- - Manufacturers Literature   1937

17_68.png DD207: Telefunken Werkstattbuch
Wolfgang Bauer


Just Qvigstad
d1_dd207.png
DD207: own collection
Peter den Boer

Usage in Models 4= 1937 ; 1= 1938

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):5

Collection of

 
dd207.jpg

 

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