I just found a copy of the 1978 ARRL Handbook, and it's at the end of the chapter on VHF and UHF antennas. Dale H. Cook, Chief Engineer, WWWR Roanoke VA, WCQV Moneta VA, WKBA WZZI Vinton VA, WKPA WLNI WZZU Lynchburg VA, WMNA/WMNA-FM Gretna VA http://members.cox.net/dalehcook/starcity.shtml