A "hard" valve electronic relay switch
W K Clothier · Journal of Scientific Instruments · 1939
A two-circuit electronic relay switch is described which uses hard valves exclusively. Certain disadvantages of the more commonly used thyratron circuits are thus avoided. The switching frequency may be controlled over the range 15 to 13,000 cyc./sec., and the electronic relay switch is therefore suitable for use with either steady state voltages or transients of low natural frequency.