The purpose of this 1965 Radio Electronics circuit is to observe cycloid waveforms on a standard oscilloscope. The frequency range depends on the switch settings.
The frequency of this circuit depends on C1 and, for the indicated values, it is 1 kHz. Equivalent...
This configuration with the LM383 appears elsewhere on this site. The circuit shown was obtained...
This circuit was obtained from HAM Radio magazine in an 80's issue. The FETs are types of the time...