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A4GDR

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ID = 9299
       
Country:
Spain
Brand: Castilla; Madrid
Tube type:  OCTODE   Frequency converter   Controlling (mu) 
Identical to A4GDR = AK1

Base Europe 7-Pin C7A (Hx C, C7, C) 1933 (Codex=Leo)
Was used by Radio/TV-reception etc.
Filament Vf 4 Volts / If 0.65 Ampere / Indirect / Specified voltage AC/DC
Information source Taschenbuch zum Röhren-Codex 1948/49   
 
e_castilla_a4gdr.jpg
A4GDR: PROPIA
Pedro Prieto-Castro

 
18_3.png
A4GDR: Telefunken Werkstattbuch
Wolfgang Bauer

 

from Just Qvigstad

Usage in Models 1= 1934 ; 2= 1935

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):3


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