The design and operation of high-power triodes for radio-frequency heating

The paper sets out the important factors in the design of high-power triodes for use in radio-frequency heating equipment. The relations between Class C oscillator performance and valve characteristics lead to relatively simple design principles. These, in combination with modern methods of construction, have made it possible to achieve an unusually high conversion efficiency with relatively low dissipation on the grid, thus ensuring adequate grid safety under varying load conditions. The design principles are embodied in a new range of industrial triodes which are briefly described.