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1603_octal

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ID = 21629
       
Country:
France
Brand: Common type France tube/semicond.
Tube type:  Vacuum Pentode   Universal 
Identical to 1603_octal = 1603N
Similar Tubes
Normally replaceable-slightly different:
  1603BV ; R121
Other class quality (otherwise equal):
  6J7G
Other base:
  1603

Base Octal (Int.Octal, IO) K8A, USA 1935 Top contact with a cap.
Filament Vf 6.3 Volts / If 0.3 Ampere / Indirect / Specified voltage AND current AC/DC
 
1603_305r.jpg
1603_octal: Collection JR
Jacob Roschy

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1603octal_so.png
1603_octal: ARRL Handbook 1972
Michael Schlör

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