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ID = 80442
Brand: Radiokes; Sydney
Tube type:  Triode, vacuum   Power/Output 
Identical to R112_Radiokes
Similar Tubes
Normally replaceable-slightly different:
  CX112 ; UX112

Base UX-Base (4 Pins (2 thick, USA 1924, UX) Other combinations of connections.
Was used by Radio/TV-reception etc.
Filament Vf 5 Volts / If 0.25 Ampere / Direct / Battery =

This tube made in the USA for the Metropolitan Electric Co, Ltd, with their brand name Radiokes. An article in the "Wireless Weekly" magazine dated September 30, 1927 states that this tube is fitted with a switch mounted on the base which controls two filaments. When one burns out, the other can be switched into the circuit.

Dimensions (WHD)
incl. pins / tip
x 108 x 45 mm / x 4.25 x 1.77 inch
Weight 48 g / 1.69 oz
Information source -- Original prospect or advert   Radio, October 15, 1927
Wireless Weekly (Australia)   September 30, 1927

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