Ceramic stacked-mount electron tubes - Receiving types

Ceramic tubes that are the electrical equivalent of the most advanced conventional receiving types, and are directly interchangeable with those types in existing equipments, are described. In particular, these tubes are able to operate under very high ambient temperature conditions (300°C), are exceptionally rugged, and have very low microphonic noise output under extreme vibration and shock. Since the basic design of the ceramic stacked mount allows for higher performance and greater efficiency than is required for the glass equivalents, the tubes for this series have been modified so that they have characteristics suitable for direct substitution in existing circuits. The unmodified versions can, therefore, be used to advantage in designing equipments for new and more exacting applications.