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E428_4pin

Information - Help 
ID = 32002
       
Country:
Netherlands
Brand: Philips; Eindhoven (tubes international!); Miniwatt
Tube type:  Triode, vacuum   Universal 
Identical to E428_4pin
Similar Tubes
Other base:
  E428
First Source (s)
1928 : L'Histoire Singulière du Tube Radio; G. Duperray 2009

Base Europe 4-Pin B4 (Eu A, E, 4A) 1914 Sidecontact
Was used by Radio/TV-reception etc.
Filament Vf 4 Volts / If 1 Ampere / Indirect / Parallel, (AC/DC)
Dimensions (WHD)
incl. pins / tip
46 x 108 x mm / 1.81 x 4.25 x inch
Literature -- Collector info (Sammler)   
 
e428_philips.jpg
E428_4pin: Sammlung
Anonymous 557 Collector

 
e415-ws1507-ws3030pin4sc_1.png
E428_4pin
Peter den Boer

 
e428data1~~1.png
E428_4pin: own collection
Peter den Boer



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