16” (40 cms) long without the radiator. 4” (10 cms) bulb. Strongly discoloured.

Dating probably to the Thirties or late Twenties.

Country of manufacture unspecified. Marked “FOREIGN”.

Ratings up to 125 kV and 300 mA.

Multi-layer heat radiator on the anode end.

   X-ray of the central part of the kenotron

Anode cooling radiator