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C509A

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ID = 19550
       
Country:
Netherlands
Brand: Philips; Eindhoven (tubes international!); Miniwatt
Developer: General Electric Co. (GE); Bridgeport CT, Syracuse NY 
Tube type:  Triode, vacuum   Universal 
Identical to C509A = BFOT = C509 = 01A
Similar Tubes
Normally replaceable-slightly different:
  CA201A ; CX201A
Other base:
  C509A_B4 ; C509_B4
First year 1932 Radios von gestern, 2. Auflage
Base UX-Base (4 Pins (2 thick, USA 1924, UX)
Was used by Radio/TV-reception etc.
Filament Vf 5 Volts / If 0.25 Ampere / Direct / Battery =
Description

laut Codex soll es auch eine Ausführung mit 4-Stift-Europasockel geben.

 
Information source Taschenbuch zum Röhren-Codex 1948/49   
uxsockel_21.png C509A: KoBi
Konrad Birkner † 12.08.2014

Just Qvigstad 		c509a_characteristics.png
C509A: My schematic collection.
Pier Antonio Aluffi

Collection of

Konrad Birkner † 12.08.2014 (D)
 
c509a.jpg

C509A
 
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