This circuit with germanium transistors was found in documentation from the 50's. The transistors are germanium of the time.
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...