This xenon flasher version for the power grid is from an 80's EDN. The circuit uses a folder and a pulse transformer to trigger the lamp. C1 determines the intensity of the pulses.
This circuit was found in Motorola documentation from the 1980s. PUTs are not common components...
This low distortion circuit was found in a 1964 Electronic Design. The transistor admits...
This circuit is based on an uncommon Texas component today, as found in an American 1980s...