This kind of goes with the other thread that has morphed into the FCP topic, but is a bit different. With an FCP feeding the INV-L, the bottom of the INV-L will be at least 10 feet off the ground. Wi
Hi Mark, I suspect the current -- and hence the radiation -- from the bottom of the vertical radiator is somewhat suppressed by proximity to gull wing radials. When I first installed a 160 vertical u
Personally, I would and do, avoid a FCP antenna. W8JI has done some analysis on these and I value his insight. http://www.w8ji.com/fcp_folded_counterpoise_system.htm There is simply too much handwav
As to gull wing radials, Rudy Severns has looked at these too: https://www.antennasbyn6lf.com/files/antenna_ground_system_experiment_5.pdf Rudy's work is a treasure trove and I think I have everythin
Hi Wes, I have also always had the highest regard for 99.9% of anything that W8JI has stated. However, I feel exactly the same way about K2AV (and, of course, Rudy too). In this particular case, I am
I guess I should have added "useful to me." At my location, I wouldn't dream of having elevated radials less than 6 feet above ground. Running them through the cactus and bushes could be just as di
Author: "Chortek, Robert L." <Robert.Chortek@berliner.com>
Date: Thu, 25 Jul 2019 22:21:20 +0000
I am going to add what may be a meaningless post to this thread. I live on a 1/4 acre lot in the black hole of San Jose California. Until very recently I was using a base loaded 1/8 wave vertical for
Hi Wes, Thanks for posting up the Severns material. I had started looking for that, but without memory of exact words (which makes searching difficult), and without absolute certainty that Rudy was w
When I did those tests at my house the velocity factor of a dipole on the ground was usually about 65% but many times there was no resonance at all, so no way to calculate velocity factor. Total impe
Hi Jerry, 65% is in the wheelhouse for DOG VF's. 400 to 600 ohms seems high. In the 12 county area around Raleigh/Durham/Chapel Hill, we measured 120 - 200 ohms resonant R. The variation you experien