A Medium-Power Triode for 600 Megacyles

An air-cooled triode, the L600E, was developed to produce a peak pulse power of 25 kilowatts at 600 megacycles for radar operation. The water-cooled 6C22 was then developed to provide higher efficiency in continuo s-wave operation at that frequency. The construction and characteristics of these tubes are described. In an experimental crystal-controlled transmitter the 6C22 has delivered 500 watts at 600 megacycles.