Triplicator for ionization chamber (CB21200E)

Found in Electronics Now, this circuit generates high voltage to charge a capacitor in an ionization chamber.

Two-Output VCO (CB19019E)
This voltage-controlled oscillator or VCO has rectangular and triangular signal outputs. The...
Lightning Lamp (CB6884E)
This 2004 circuit is based on the ionization effect that occurs in old incandescent lamps with...
NPN and PNP Transistors Tester without Switching (CB19468E)
This interesting circuit for testing NPN and PNP transistors for general use and medium power was...