This interesting benchtop circuit was found in the May 1977 issue of Radio Electronics magazine. The circuit has frequency adjustment, and the waveform selected by a switch.
This oscillator uses a small IF transformer taken from an old transistor radio. FET admits...
This circuit works like a solid-state contactor. We find it in General Electric documentation from...
This amplifier stage was obtained from a Popular Electronics from the 90s. The transistors are...