Got a antenna grounding question

Just a suggestion, get yourself a big square of sheetmetal of some sort. Mount it directly to the underside of the topper were the antenna is going to be located. Epoxy of some sort shoudl handle the bonding to the fiberglass. Just rough up the surfaces a bit first. Then drill your hole to mount your antenna. Get a mount that has a wide enough base to keep the antenna from tearing up the fiberglass as it moves around in the wind. Run a cooper ground strap from your sheetmetal plate to a good chassis ground. The wider the strap the better.

Just be aware that fiberglass antennas don't like solid objects such as tree branches, overhangs in drive throughs etc. Personally I would look into a stainless whip typoe antenna such as a wilson 2000. The shorter main shaft would probly be the best option in your setup.

On my pickup, I went to the TS and got a magnetic base, screwed a wilson 2000 into it and slapped it on the roof of my Dodge 1500 quad cab. In the center but as far back as possible on the roof. It works great, don't get any warning lights on the radio, SWR is less then 1.5:1 and it gets out about 10 miles and this is using a old pretty much stock Uniden 78 (twin to the cobra 29). I can take it down if need be etc. It has not left the roof on its own even at speeds greater then 70 mph in 30 mph winds.

 

There are 2 different kinds of ground with antennas, an electrical ground, like you are talking about doing with a ground strap, and a ground plane, which is more like a reflective surface for the radio wave eminating out of the antenna to bounce off of.

 

"The term counterpoise has a long history in antenna engineering and amateur practice. Today, it may be among the most misused terms in amateur circles."
http://www.antennex.com/shack/Dec06/cps.html


Since RF is AC how do you figure RF likes lot of storage?

I'd say your main problem is most truckers use twin antennas and their radiation pattern would be 90* to your location.

Leon
(kc0iv)

 

SAY WHAT

A counterpoise IS a groundplane and rat's idea should work.

 

I'm missing where anyone asked a question that you've even remotely answered-you keep repeating the same answer over and over (not quite "1000 times," but you're getting there) to a question that nobody here has asked! The original poster asked if mounting a fiberglass antenna to his fiberglass top would work well, and Rat gave him a couple of ideas to try. You've done nothing but spout off a bunch of questionable, impractical antenna theory using misleading and confusing language.

Somebody correct me here if I'm wrong, but 60 cycles per second (twirling the electron around your head 60 times in one second) is 60Hz. A Hz is a unit that means cycles per second.

No such thing as a Hertz? So using this logic there's no such thing as a joule, or a farad, amp, newton, volt, watt, et cetera?

 

And here I thought we were talking about where to rent a car, and Avis' competition!

But I have used a cookie sheet with a mag mount connected to my HT on VHF, but I must have been dreaming that it really worked.

 

OK I'll bite. No you are not wrong about the math concept as it relates to megahertz, 60 hertz, etc.. An electron would not be held in tweezers (too much electrostatic repulsion) so the idea is a moot point and what difference would above your head make. OK lets forget that. If it is orbiting in a circle the electron will radiate nothing, it will merely be surrounded by a magnetic field and DeBroglie waves tangent to the orbit's Z axis. It must move back and forth to radiate, since it is the deceleration, i.e., loss of linear momentum causing radiation. Excepting thermal loss we could say this is where your watts are being used, and is correlated to the idea of antenna radiation resistance. If CJ's idiotic statement that an orbiting electron radiates was correct, all electrons in all atoms would radiate their energy frying us with hard Gamma radiation on it's way to the ground state, fall into the nucleus, emitting neutrinos as neutrons were created. The resulting neutronium would crush us with it's gravity. Of course assuming we survived the radiation. Another moot point our bodies would also transform into neutronium. Every so often some elements do undergo K capture of a single electron causing nuclear transmutation, but CJ is proposing this will be all electrons at once. Say goodnight Irene.

No such thing as a Hertz? Not what His wife said. To her anyone denying this would be an escapee from a mental institution. To real men of science of course one Hertz is one cycle per second.

I truly have never encountered anyone so overwhelming in their clogging server space with so much babbling gibberish.

By the way Rat's idea would work, does work, and has worked for literally hundreds of thousands of people before. Rat's radios are not all broken, besides how can someone who does not know Rat make such an assuming comment anyway.

 

I'd like to see somebody rotate their arm at 60Hz, while we're at it..

 

If your are trying to work the satellites, which way you rotate your arms will make a difference!