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ID = 73238
United States of America (USA)
Brand: Arcturus Radio Tube Co.; Newark, NJ
Developer: Arcturus Radio Tube Co.; Newark, NJ 
Tube type:  Vacuum Pentode   RF/IF-Stage 
Identical to 58_Coronet
Similar Tubes
Other base:

Base Octal (Int.Octal, IO) K8A, USA 1935 Top contact with a cap
Was used by Radio/TV-reception etc.
Filament Vf 2.5 Volts / If 1 Ampere / Indirect / Parallel, (AC/DC)

The Arcturus metal glass type 58 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 be fit the normal U6A 6 pin tube socket. The adaptor measures 37 mm long and is 30 mm diameter.

Dimensions (WHD)
incl. pins / tip
x 82 x 32 mm / x 3.23 x 1.26 inch
Weight 46 g / 1.62 oz
Literature 70 Years of Radiotubes and V.   Pages 99 & 100
-- Collector info (Sammler)   

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