Relaxation oscillator using a Thyratron (T426E)

This oscillating circuit for a frequency of 588 KHz was found in a book on electronic designs with modern tubes.

Water Pump Automatic Control (CB18101E)
The purpose of this circuit is to automatically turn a water pump on and off. Sensor 1 is the...
Assisted Ignition (CB6379E)
This circuit was found in Motorola's 1967 documentation. The circuit makes use of power...
Transistor Sun Tracker (CB22523E)
This interesting circuit appeared in the April 1952 Radio Electronics magazine. The circuit is...