This circuit was obtained from a 1968 documentation and can be adapted to use current equivalent components. The maximum frequency depends on the components used.
The HV2405E integrated circuit is not very common these days. This circuit was found in the August...
This circuit was found in an American publication from the 60's. Transistors are germanium types of...
This strobe light circuit for car spot adjustment dates to 1987, when there were no electronic resources...