A New 100-Watt Triode for 1000 Megacycles

The design and developmentof a 100-watt, grounded-grid triode for operation at full ratings up to 1200 Mc is described. Unusual mechanical design features have been utilized to achieve a tube which not only is capable of excellent performance at ultra-high frequencies, but which can also be manufactured by production-line methods. The outstanding design features making this performance possible include close spacing of a coaxial structure to give high perveance; precision cold working of metals at high unit pressures to fabricate all electrodes; and assembly of the tube using localized rf heating methods and precision jigs to maintain accurate spacing of electrodes. Circuit and performance data of this new tube are given as a power oscillator, as well as a uniquely neutralized ultra-high-frequency power amplifier.