This Nixie pipe circuit was found in 1965 documentation. Note the high supply voltage. Appropriate transistors of the time were used.
In fact, this 1967 Electronic Design circuit generates two symmetrical ramps whose frequency...
Voltage regulators from 5 to 15 V for currents of 1 A, can be easily obtained in the form of...
Found in the November 1974 issue of Radio Electronics magazine, this circuit has a frequency range...