I've heard that it often helps the performance of slopers, "Cloud Warmer" dipoles, and low Yagis if one puts radials under the tower (or whatever they happen to be mounted on). Is this actually true,
In the limit, it would be like improving the conductivity of the ground underneath the antenna to the point where it's over a perfectly conducting surface. Whether this is good or bad kind of depends
I have a 230 foot diameter wire grid ground screen. I tried building a 40 meter ground warmer dipole about 15 feet above it. I didn't see any measurable improvement with signals received vs a 30 ft h
"Cloud the tower (or Low yagis can benefit from radials, and low dipoles absolutely will. The wires need to be directly below the antenna and parallel to it. Just laid on the earth is fine, and they
LOL! What a hoot that would be. Of course, as you stated, you would have no ground loss, so it could get interesting seeing how much off-center power makes the trip to a DX station. Keith In the lim
This is a really valid design, though, if what you want is to cover the local area pretty thoroughly on a low-frequency band like 40 or 75. No skip zone! It would be great for regional nets that cove
NVIS: Near-Vertical Incidence Skywave. 73 de Gene Smar AD3F local zone! It so. of it Weather Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any questions and ask for Sherman, W2FLA. _
straight up. stated, you would have Actually the low angle signal isn't reduced. All this does is remove loss. In some cases lower angle signals will improve. This assumes you lay the wires on or in
local zone! It so. of it NVIS - Near Vertical Incidence _______________________________________________ See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless Weather Stations", and l
We always called the antenna an NVIR (near vertical incidence radiator) antenna, and the mode was NVIS (near vertical incidence skywave). It certainly isn't new. The first I heard of it was in the 60