This MFJ-4103 Miniature Switching Power Supply can deliver up to 40 Watts (13.8 VDC at 2.89 Amps) of reliable power anywhere in the world! Its an incredibly tiny 4 ⅛" x 2 ⅝" x 1 ⅜" and weighs just 10 ounces including output power cord and connector. It has an output DC cable with a standard MFJ coaxial DC power connector (2.1mm ID, 5.5mm OD) that fits most MFJ and other ham accessories and QRP rigs. A sturdy adapter cable is also included for use with the Yaesu FT-817. Its perfect for QRP rigs needing up to 2.89 Amps. The MFJ-4103 Mini Switching Power Supply works for input voltages 100-240 VAC and power line frequencies 47-63 Hz. Use the MFJ-4103 almost anywhere in the world by plugging in an AC power cord with an appropriate wall plug for that country (not included, laptop computer AC cord recommended).

The MFJ-4103 is protected from overvoltage, overcurrent, and overtemperature. It has excellent 1% line and 5% load regulation and 1% peak to peak ripple and noise. Operating temperature is 0-40 degrees Celsius. Mean time between failure is 100,000 hours at full load at 25 degrees Celsius ambient. It meets FCC part 15 class B, UL 1950 and CSA 22.2