This circuit is from Delco Radio found in a 1968’s documentation. The transistors are of the time and are not given information about the driver transformer. Note the high supply voltage.
This circuit was found in a Delco 1965 publication. Transistors may be current equivalents according...
This circuit makes an incandescent lamp blink in order to vary its brightness with a candle...
This configuration was found in a 1970s American magazine. The circuit uses both CMOS logic and...