This circuit was obtained from a 1980's QST magazine. The circuit can generate 1 to 15 MHz signals with 1 Vpp at 50 ohms load. Used transistors are still common today.
This simple circuit was found in Popular Electronics. It can be built with any JFET. Galvanometers from...
This single-cell Li-Ion battery charger was found in a 2005 Linear Technology manual. The circuit...
This 1969 Electronics World power supply has 5 V to power digital circuits and a 170 V output for...