The 25-Foot Untuned Vertical--7 Bands. Post #1106.
The 26-Foot Untuned Vertical--7 Bands (http://www.eham.net/articles/29052). Author: Dave Benzel (KD6RF) Accessed on 20 April 2016, 02:50 hrs, UTC. Please click link or insert title URL into your browser search box to read the full article. Comment: If you want a fairly efficient, multiband HF vertical that is only 25 feet/7.62 meters long, then this untuned vertical from Dave Benzel (KD6RF) is just what you need. According to Dave, the 25 foot/7.62 meters long antenna is "quantitatively similar" to the 43 foot/13.109 meters vertical antenna, but is only about half as long and "is designed to provide acceptably efficient operation from 40 through 10 meters." With ground and feedline losses major issues for vertical antennas, Dave solved those issues by using 7/8" heliax feedline, an elevated counterpoise consisting of a long metal fence, and nearby "shorting rod" with a coil, which serves as a decoupling device for higher bands. Dave pro