This article was supplied by John VK3HJQ Hi there, Power Supply Problem I had a slight problem with my shack 13.8V 10A power supply, its output voltage went from 13.8v to 26v, “Oh No”, “Yes No” it took out the 723 voltage regulator, TIP31C & both 2N3055’s in the supply but luckily no radios. Here is a simple CrowBar circuit […]