This transmitter for the 40 meter or 7 MHz band was found in a magazine 73 for radio amateurs of the 90s. The circuit has a power of ½ W.
This well-designed bistable circuit was found in a 1970s documentation. Transistors can be current...
This simple circuit, suggested by 1969 documentation, has already been featured in other articles...
This circuit, which appears elsewhere on this website, was obtained from 1967 General Electric...