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28_Arcturus

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ID = 56020
       
Country:
United States of America (USA)
Brand: Arcturus Radio Tube Co.; Newark, NJ
Developer: Arcturus Radio Tube Co.; Newark, NJ 
Tube type:  Triode, vacuum   Audio Frequency 
  Ca. 1925 up to 1945 rare.
Identical to 28_Arcturus = AC-28

Base UX-Base (4 Pins (2 thick, USA 1924, UX)
Was used by Radio/TV-reception etc.
Filament Vf 15 Volts / If 0.35 Ampere / Half indirect / Specified voltage AC/DC
Description

Special indirectly heated tube from 1928 with one end of the 15 volt AC heater connected internally to the cathode. The result was an AC tube with a standard 4 pin base which could be used to "electify" battery receivers. There were 7 tubes in the 15 volt series with numbers running from AC22 to AC48. Arcturus did not use the "AC" prefix on the tube numbers in their ads, but the earliest production tubes were so marked on their bases. This tube has a carbon filament and was operated by a 15 volt AC transformer, which were used mainly by toy train manufacturers.

 
Dimensions (WHD)
incl. pins / tip
45 x 120 x 35 mm / 1.77 x 4.72 x 1.38 inch
Weight 53 g / 1.87 oz
 
arcturus_28.jpg
28_Arcturus: Fin Stewart collection
Fin Stewart

More ...
 
ac_26_28_32_40_48_ra1_so1~~7.png
28_Arcturus: Fin Stewart
Fin Stewart

 

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