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.
In the figure we have a regulator circuit for output voltages of 0.5 to 10 V with currents up to...
The diodes in this circuit are used for waveform correction. The circuit is from Electronics Now...
We found this circuit in an old American documentation. The circuit applies to modern equivalent...