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ID = 75731
United States of America (USA)
Brand: Star (tube brand) - made in Holland
Developer: General Electric Co. (GE); Bridgeport CT, Syracuse NY 
Tube type:  Triode, vacuum   Audio Frequency 
Identical to Detector_Star = D4_Philips = PR11_Condor = D-IV

Base UV199
Was used by Radio/TV-reception etc.
Filament Vf 3.5 Volts / If 0.5 Ampere / Direct / Battery =
Description This tube was made in Holland about 1924-25, in an attempt to sell tubes in the US. GE/RCA filed four patent suits against Philips. Both companies realised that years of litigation might follow and agreed to a compromise: GE/RCA would share patent rights and Philips would stay out of GE/RCA territory. 
Dimensions (WHD)
incl. pins / tip
45 x 103 x 35 mm / 1.77 x 4.06 x 1.38 inch
Weight 42 g / 1.48 oz
Information source Saga of the Vacuum Tube, Tyne   Pages 428 & 429
Detector_Star: Bill Condon collection with permission from Mrs V Condon
Fin Stewart

Detector_Star: Fin Stewart
Fin Stewart


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