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DF1

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ID = 3818
       
Country:
Europe
Brand:
Tube type:  Vacuum Pentode   RF/IF-Stage 
Identical to DF1
Similar Tubes
Other base:
  1N5

Base Octal (Int.Octal, IO) K8A, USA 1935 (Codex=Sup)
Filament Vf 1.4 Volts / If 0.05 Ampere
Description GB: (Traders Service sheet 450) 
Information source Taschenbuch zum Röhren-Codex 1948/49   

df1.png DF1: Prüfkarte Röhrenprüfgerät W 18N
Jörg Kulbe

More ...

Just Qvigstad
df1_characteristics.png
DF1: My schematic collection.
Pier Antonio Aluffi

Usage in Models 17= 1939 ; 5= 1940

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):22

Collection of

 
df1_2.jpg

DF1
 

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