A Quantitative Study of the Dynatron

This paper describes two methods of predicting the performance of a dynatron oscillator. The use of the Massachusetts Institute of Technology differential analyzer is the first method described. This machine has been used to determine the amplitude of oscillation and harmonic content of a type '24 tube dynatron oscillator for various conditions. A corresponding experimental study is presented in the Appendix for comparison. The second method described is the use of the output characteristics. These are curves of the fundamental component of plate current produced by a sinusoidal plate voltage. They may be computed from the tube charcteristics or measured experimentally. An analysis by this method of the type '65 tube oscillator is given. An experimental study is presented for comparison. One case of interest is the use of a crystal as the tuned circiuit.