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ID = 52123
Brand: Bal-Tubes (Pope and Philips made); Breda
Developer: Bal-Tubes (Pope and Philips made); Breda 
Tube type:  TRIODE (Detail uncertain) 
  <1925 very rare. ***
Identical to Receiving
Production stop Nov.1920

Base Base on each end.
Filament Direct
Description The Bal receiving tubes were made by Pope in Venlo in 1918 and 1919. In 1920 the Bal receiving tubes were made by Philips. The Philips made tubes are identical to the Philips C1 and C2 and Ideezet types and have Philips etched on the glass an printed "Bal radio, Breda Holland" printed on one of the bases. The Pope and Philips made tubes have the electrode structure of a deForest double wing Audion. But the Philips made tubes have very tight specifications as for seize, while the Pope made tubes differ very much in seize and have sometimes frosted glass. Philips used always metal strips as support rods to the plates, where Pope used wires. 
Dimensions (WHD)
incl. pins / tip
25 x 122 x mm / 0.98 x 4.80 x inch
Weight 26 g / 0.92 oz
Peter den Boer


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