TRS/2: crossatron switch for thyratron replacement in line modulators

A second-generation thyratron-replacement switch (TRS/2) based on the crossatron-switch design has demonstrated continuous full-power operation at 4.0 A of average current in a US Navy line-type radar modulator. The outstanding feature of the TRS is its ability to provide ultrastable, fast recovery and fast starting operation while maintaining the potential for long-life service. Improved performance of Navy modulators is being obtained by replacing the Model No. 7390 thyratron with the TRS device, which maintains mechanical and electrical specifications sufficiently similar to those of the 7390 that it can be regarded as a socket replacement. The specifications and construction features of the TRS/2 are described, and attention is given to the operating procedure, test results, equilibrium temperature, start-up time, turn-on delay and jitter, and range of gas pressure yielding stable operation