First, use a direct connection to the battery terminals. Second, twist
the connecting wires 2 or 3 twists per foot from the battery to your
radio. Third, get a GOOD chassis ground connection for the radio.



Excellent advice. I would add: fuse both hot & ground for good measure at
the battery ends of the connections. You could also loop the power cord a
couple of times and put a ferrite bead on the power leads.

Always run heavier wire than you think you'll need. It reduces loss and
someday you might want to put out more wattage.

If it's a temporary set-up, use one of those gel-cell booster batteried to
power your radio.

73s!