A $20 HF mobile antenna
A few hours of fun with PVC and wire and you have got yourself a respectable road radiator. The antenna consists of little more than some PVC pipe topped by a RadioShack replacement whip antenna and a couple of coils made from a small roll of #14 house wire.
Visit A $20 HF mobile antenna DXZone Resource Page
Download 0004033.pdf file from www.arrl.org