This circuit was found in American documentation from 1966, but it can be assembled with a modern equivalent transistor. The circuit is based on a mechanical tuning fork with a coil feedback system.
This is the basic operational amplifier configuration for gain 10. R2 can be changed to other...
This circuit was obtained in a 1988 publication, but it can be assembled very easily today, as all...
This circuit was found in a 1966 EEE. Transistors support modern equivalents and the waveforms are...