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ID = 73201
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 
Identical to 27_Coronet
Similar Tubes
Other base:
  127 ; 27 ; 427 ; C327 ; UY227

Base Octal (Int.Octal, IO) K8A, USA 1935
Was used by Radio/TV-reception etc.
Filament Vf 2.5 Volts / If 1.75 Ampere / Indirect / Specified voltage AC/DC

The Arcturus metal/glass type 27 tube is unusual in that it employs a glass disc instead of a conventional "pinch" for introducing the lead-in wires into the glass bulb. The disc has the wires in a circular formation. The base is octal but an adaptor was sold with the tube to enable it to fit the normal 5 pin UY socket. The adaptor measures 37 mm long, including pins and is 30 mm diameter.

Dimensions (WHD)
incl. pins / tip
x 75 x 32 mm / x 2.95 x 1.26 inch
Weight 44 g / 1.55 oz
Information source 70 Years of Radiotubes and V.   Pages 99 & 100
-- Collector info (Sammler)   

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