An Amateur Radio Power Supply 13.8V 30-40A with short circuit protection - all you need to run the most common 100-200W Amateur Radio transceivers...!
My homebrewed 13.8V 30-40A primary Power Supply, with built in short circuit protection, build on POWER FET transistors.
This is the primary Power Supply for my Amateur Radio Shacks transceiver equipment. The Power Supply is build around the LM723 controller and four BUZ24 (or IRF150) power N-Channel FET transistors. FET transistors are used because of the simplicity of controlling the current through these transistors, it's simply voltage controlled, and because of the low power consumption of the controller board. The Power Supply is initially based on ideas from TF3MA.
The Printed Circuit Board (PCB) and the layout
...from another angle
Here are the holes for connection to the four FET's gate and source.
Mounting two of the four BUZ24 FET's at one of the two
An inside look at the Power Supply. At the left is a transformer
A look at the rear of
the second hand chassis of my Power
The two power resistors
in the back are two of the 0.1 ohm
An overview of the inside of the Power Supply
Another picture of the
front of the 13.8V