(RHF) wrote in message C. Crane Co. - AM/FM Auto Antenna - Purpose: Improve AM reception
on your automobile. Remember: An antenna is more important than
your radio, always!
http://www.ccrane.com/am_fm_auto_antenna.asp

This is very similar to what I used many years ago and it improved
reception so much that I could listen to distant AM stations loud and
clear that I could barely hear at all with the regular rod antenna. I
would highly recommend this to anyone wanting a strong signal on AM.