Rugged PSU for ham radio transceivers

This rugged power supply is based on the popular LM338 3-pin voltage regulator. The LM338 is capable of supplying 5 A over an output voltage range of 1.2 V to 32 V with all standard protections like overload, thermal shutdown, overcurrent, internal limit, etc., built in. In this power supply, some extra protections have been added to make it particularly suitable for use with low to mediumpower portable and mobile VHF/UHF (ham) and 27 MHz transceivers.