This circuit was found in Radio Electronics magazine from October 1964. The circuit uses period components but can be implemented with equivalent modern components.
This circuit was found in Radio Electronics magazine from April 1961. The device has a slot for...
This 1967 Electronics World circuit is suitable for frequencies up to 1 MHz. The setting applies...
Found in a 1968 Motorola manual, this DC circuit uses components from the era. The circuit fires in...