A Recent Development in Vacuum Tube Oscillator Circuits

A constant frequency oscillator, which depends for its operation upon the use of electron coupling between the oscillation generating portion of the circuit and the work circuit, is described. This form of coupling is employed to isolate the work circuit from the frequency determining portion of the system. The oscillator is of the two-anode type (UX-865) and it is shown that by suitable choice of anode voltages, compensating effects may be obtained whereby changes in generator voltage may be made to have a negligible effect upon the frequency of oscillation.