Doug I recommend that you read the articles by Butternut Antennas at the included link <http://www.bencher.com/pdf_download.html#tech_notes> Dirty little secrets will give you all the info that you'll need. I use an HF9V w/160M coil ground mounted over 26 radials of 700'+ feet of wire. RC KC5WA -- Ham Radio! IT IS MY ADDICTION