Building a workbench 12v power supply.


Building a 12v power supply is very simple. Unless you need to power a radio receiver with it, you can go with a switching supply.

For anything above about 10 MHz, one of these would work. They tend to have spurs that show up on HF receivers on the lower bands. Mobile HF transceivers need quite a bit of current but the 10A version should work for all but the most demanding of them.

Even so, a linear supply isn't tough. The biggest problem is finding a suitable transformer and then designing the regulator. Getting a heatsink for the regulator can also be a problem.