Abstract :
A new pulse tetrode (the X656) has been developed which is intended for applications involving severe shock or vibration. Designed to operate satisfactorily under conditions of 200-g shock or 10-g vibration, the electrical characteristics of this new tube are similar to those of the widely used 4PR60A. Typically, 18 amperes of pulse anode current is available when operating at 20 kv. Several factors contribute to the improved performance. Not only is the tube made of metal and ceramic, but the entire internal supporting structure involves a new design. Basically, this is an internal anode tube with a ceramic envelope. Tube elements are mounted on rigid die-formed cones, rather than on rods or pin supports. Any relative motion between the grids and the cathode is inhibited by means of a ceramic reinforcement pin which is brazed into place.
