MFJ-1312E, AC ADAPTOR, XFMR, 13.8VDC, 500MA, 110VAC, 2.1MM PLUG

The MFJ-1312E is a 13.8 VDC 500 mA AC Adapter with a 2.1mm jack.  It is used to supply 13.8VDC power to a large range of MFJ devices.