Found in a 1965 Electronic Design, this high voltage circuit uses period transistors. Its purpose was to excite Nixie display tubes common at the time.
The circuit shown is from an old European publication. In it we have the way to activate a relay...
We found this circuit in a European publication from the 1990s. Transistors are still common types...
This circuit was found in an American documentation and can be added to common amplifiers of any...