Source for LASER (CB7843E)

This power supply for gas laser (HeNe) was found in a 90’s Popular Electronics. It generates from 1300 to 1500 V using common components.

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400 Hz SCR Trigger (CB13893E)
In the figure we show a trigger circuit for triacs with a unijunction transistor. The circuit is...
Overcurrent FET Oscillator (CB13121E)
The oscillator in the figure has its frequency determined by the crystal. The indicated value is...
Frequency standard (CB23580E)
This circuit was found in the November 1959 Radio Electronics magazine; The circuit generates a...