Build a 1/4 wave groundplane like Beetle said.
It's too easy.
I used an old fiberglass
CB antenna.
Stripped the plastic coating off, unwound the wire, cut the glass off at about 19" and trimmed the wire to to about 20".
Fold over the last half inch or so for tuning, and put the wire straight up the glass, wrapping it from the bottom up with electrical tape. Stop about an inch short for tuning.
Using a piece of flat AU or a big mobile mount, drill four #8 holes, each at the four corners of a square(90 degrees apart). If using flat stock, drill a 1/2" hole in the middle.
Solder four pieces of 19" solid copper wire(romex) to ring connectors.
Using #8 screws, nuts and washers, attach each copper wire to each #8 hole drilled.
Attach the glass antenna to the center hole( using plastic insulators), and bend the copper wires to 45 degrees down from the glass element.
Take a piece of 3/4 PVC pipe( white), 5' long and cut it long wise twice from one end, in an X, make the cuts about 2" long.
Attach a hose clamp on the outside of the PVC at the place where the cuts are.
Thread coax through the pvc, screw it onto the connector of the glass antenna, drop it into the PVC and tighten the hose clamp.
You now have a VHF 1/4 wave groundplane.
Tuning is done by folding/unfolding the verticle wire. The radials( copper wires) can also be adjusted by angle.
stationmaster 
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Linear Mode
