HF3 has the power supply for the HF antenna built in since 2005 (Red label on back of radio chassis).
If you want to use the antenna for another receiver you will need this power adaptor to provide 12V.
50 millivolt 200 Amp shunt for Clipper BM-2 and BM-2 Compact
Spare antenna with 7 metre cable
Spare Cruiser Log display unit
Spare Alarm Buzzer for the Clipper Duet
Dust cover for Clipper Navtex, Weatherman, AIS Radar,
Meteoman and MOBi man overboard indicator.1
Spare log skin fitting
Spare cable to connect the AIS Plotter/Radar to GPS
Spare mounting blocks and screws for masthead