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ID = 51126
Brand: Pope's Draad- en Lampenfabrieken; Venlo
Developer: Philips; Eindhoven (tubes international!); Miniwatt 
Tube type:  Triode, vacuum   Detector 
  Ca. 1925 up to 1945 rare.
Identical to PR55_Condor
Similar Tubes
Other base:

Base UX-Base (4 Pins (2 thick, USA 1924, UX)
Filament Vf 6 Volts / If 0.08 Ampere / Direct / Battery =
Description Detection anf LF amplification. Also with B4 base. 
Dimensions (WHD)
incl. pins / tip
41 x 97 x 35 mm / 1.61 x 3.82 x 1.38 inch
Weight 52 g / 1.83 oz

ux4_9.png PR55_Condor
Peter den Boer

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