LOOK: If anyone is interested in reading a good comparison article with real data on two of the more popular "coil" antennas I was attempting to mention above (the Predator and Monkey Made antennas) here is a decent review article here: (it also provides numbers against the 102-whip and Francis 5'5" stick)
CB Radio Antennas, Which one is right for you? CBradiomagazine
http://cbradiomagazine.com/Feb%202007/C ... %20you.htm" onclick="window.open(this.href);return false;
209 first class wrote: ======== there are no signal tests, and no proof in that article. just because an antenna has lower swr, does not mean it is more efficient ,lol. its a selling gimmick. so..if i take a round tube, and pound it flat with a hammer, it has more surface area ? it will have the same surface area... if a coil is any thicker than the vertical radiator, its not adding anything. what makes a coil efficient is the spacing,material and dielectric. everyone will try to tell you different, but know for a fact any antenna with a coil is not as efficient as its full length original size. all coils induce loss. some are so close u almost couldent tell, but will never equal. 209
Well I nearly completed a posting here earlier but a lightning strike killed the power to the house and the PC. Hi 209 I see you meant to quote a previous post of mine and had pointed out the CBRadioMagazine link I provided.
You know, one day I spent about 5 hours searching online for anything that would show any type of data at all on these two types of coiled antennas, particularly the Predator 10K and the Monkey Made antennas because they seem to be the most popular and are also chief competitors.
After all those hours & hours, all I could find were countless commercial websites selling and promoting their products and of course numerous online forums with people also promoting their brand-loyalty. I'd invite anyone here to spend time looking around and find something even remotely worthwhile. The CBRadioMagazine link I had discovered last year and posted a link to for some outside reading on the subject of the two brands. Far from being a "scientific" analysis of the antennas, it did seem to compare the two and be somewhat unbiased. That's all, and still worth a read.
It is commonly said that a "$400 radio with a $25 antenna performs like a $25 radio system". True that--that true.
Flat vs. Round? I don't know in the end I guess. It's a Pandora's Box subject with much speculation. The question is "which is better" I think.
As far as "the shape" and how electric/electromagnetic signals react to conductors? I do know with near certainty that any electrical current travels more efficiently along the skin of a conductor. I do know too that according to the NEC book-----even with a large thick solid wire conductor----current only flows along the surface and not within the solid core.
Given two identical mass metallic conductors, more current (ampacity) will more easily flow on a stranded or tubular surface than with a solid one because of more surface area. What I was saying was that it appears that a tubular surface is more 3-dimensional and has more surface area. Since this is a loading coil with nominal voltages we are all discussing, then I don't know in the end what bearing that would have, perhaps none. Doc had a good point there also, that RF does not like sharp edges as the Monkey Made and other similar flat coil antennas have. "Round" seems to be an ideal shape to electric fields and currents.
If I ever had real time and money (as in "Powerball" or "Mega Millions" ) I would absolutley contribute something back into this age-old argument in the form of actual unbiased laboratory analysis. I'd love to and would put many CB products to a scientific-method comparison, done for consumers much in the way "Consumer Reports" magazine has done with other products on the market. I tell you with absolute certainty I would start with "CB Antennas" and go from there. Comparison, features, performance data----everything. People need ACTUAL/FACTUAL/UNBIASED information not sales pitches. Like Dragnet with-----"just the facts" ma'am.
Did anyone know-------that often the number one reason a woman will buy a car (or choose one car over another) is because of the number and placement of it's cupholders ??? True, Google or Yahoo it.
I wonder how many guys end up doing a somewhat similar thing----with their choice of their CB radio gear or antennas----without even realizing it ??? Hmmm . . .
I admit I do have two Predators and a Monkey Made, but I also have two 1/4-wave whips and about 30 other various mobile antennas. I've had enough success with what I've tried in the past to be generally satisfied, but I think too alot of that had to do with a good mounting location and decent overall installation in general. And wattage.
I think CB Coils---ie "spring fever"---have really taken hold.
He we are at the new antenna assembly factory . . .
It was mentioned about coil base antennas. What comes to mind immediately for me is the Bencher Butternut HF9V. People are using them and claiming good results, but people have claimed alot of things. Still they have a loyal following. I do have a nice chrome Bencher BY-2 Iambic Paddle keyer from them (first one was/is a US Signal Corps J-38)---just have to learn how to use the &^%@ things they're alien. Anyway how about a Bencher "mobile" antenna?
Pssst . . by the way----I see they are using round coils.
How'd that look mounted on a Suburban ??? Have that comp look