I believe that it's because the center conductor at the feedpoint (where it attaches) becomes part of the length for the upper portion of the element.
Your real challenge may be the feed harness. You may need to construct a new one, unless you get lucky. Chuck WB2EDV ----- Original Message ----- From: "NORM KNAPP" <nkn...@twowayradio.net> To: <Repeater-Builder@yahoogroups.com> Sent: Saturday, April 24, 2010 8:18 AM Subject: [Repeater-Builder] DB224 antenna question. > Hi group. > I am working on some db224a folded dipole elements. I have cut them and > have added smaller tubing inside in order to make them longer for proper > resonance on 2m. I have measured several factory dipoles and have noticed > that the length from the bend of the loop to the support tube on the feed > side is shorter than the closed/non-feed side. Why is this? Is there a > ratio I need to know about? > As soon as I get the proper lengths figured out, I am going to weld > everything in place. > Thanks es 73m > Norm > > > ------------------------------------ > > > > Yahoo! Groups Links > > > -------------------------------------------------------------------------------- No virus found in this incoming message. Checked by AVG - www.avg.com Version: 9.0.814 / Virus Database: 271.1.1/2831 - Release Date: 04/23/10 14:31:00
