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ID = 73239
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 77_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 6.3 Volts / If 0.3 Ampere / Indirect / Specified voltage AND current AC/DC

The Arcturus metal/glass "Coronet" type 77 tube was unusual in that it employed a glass disc instead of a conventional "pinch" for introduction of 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 U6A 6 pin tube socket. The adaptor measures 37 mm long, including pins, 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
Information source 70 Years of Radiotubes and V.   Pages 99 & 100
-- Collector info (Sammler)   

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