SPARK GAP SWITCHES FOR RADAR 



599 



construction is illustrated in Fig. 24. This tube was developed for radars 

 which were for long range search on shipboard. In these modulators three 

 tubes were used in series to switch a peak power of 0.8 megawatts and 1.4 



Fig. 24 — Western Electric 1B42 spark gap tube. 



megawatts, respectively, into high power triode oscillators. These modula- 

 tors were to be capable of operation at either half or full power. The equip- 

 ment was to be capable of withstanding the shock and vibration normally 

 encountered on shipboard. 



The series of gaps was required to operate with peak switch voltages 



