Does anyone have any info on building a one-piece vertical antenna that would be useable on 10-20meters? I currentl have an A-99 which-like many jointed antennas tend to whip around in the wind and weaken at the junctions. I would like to put up a vertical antenna consisting of aluminum pipe 1-2" diameter and wondering if it can be done with a length under 20 feet. (I do have an antenna tuner, but would like to find out if there is an "optimum" length). The antenna would be end fed and no radials, securely clamped at the top of the tower and insulated from same. Is this even possible?