This simple signal generator with transistors was published in Radio Electronics magazine in November 1957. The circuit generates signals determined by the coil and modulation by the transformer.
This circuit was found in a 1967 Raytheon manual. The transistors are from the time. Equivalent modern...
This circuit was published in a 1979 magazine, but it can still be easily assembled as the...
The circuit presented generates short pulses. This configuration was found in a publication from...