This circuit is from a Radio Electronics magazine from August 1974. It used one of the first photomultiplier tubes that was to be powered by high voltage. The power came from the mains.
The circuit shown in the figure can be designed with more modern operational amplifiers, as it is...
This transmitter has a power of only 2 W, but with a good antenna it can send its signals over...
August 2017 - The new DPS1133 power switches from Diodes Incorporated for currents up to 3.3 A...