Found in Motorola's 1968 documentation, this control appears elsewhere in this section. The bridge diodes must have current and voltage according to the motor used as load.
This is the traditional unijunction transistor relaxation oscillator circuit for the audio band. The...
This is half of a 4-channel amplifier from a system published in the October 1971 issue of Radio...
This circuit works both as a grid-dip (transistorized) and as an oscillator. The circuit is from a...