Makes a good lightning rod, too!
(Be sure to ground it with a separate grounding wire to earth ground.)

Roger wrote:
Cut a piece of thin brass brazing rod, or brass, or copper to a
quarter wave length. Solder that into the chassis side of the SO239
connector. This is the radiator/antenna. Cut 4 more pieces of the
brass (or what ever) rod about 10% longer than the radiator. Solder
one end of each into one of the corner holes. Bend these out at about
45 degrees so the thing can stand on them. You now have a good
antenna. It will stand on a flat roof, or straddle the peak. Use a
bit of Silastic RTV (TM) to hold the feet to the roof.