This circuit was obtained from HAM Radio magazine in an 80's issue. The FETs are types of the time and the frequency is determined by the crystal. The circuit operates at voltages from 3 to 9 V.
The 709 integrated circuit is not common today. The circuit is from American technical...
This conventional slow-moving circuit uses incandescent light bulbs, but can be changed to use...
The circuit shown in the figure consists of a phase shift oscillator and its components have been...