I agree Carl, but you do need the horizontal room, which I often did not have in many of my locations. That's why I kept coming back to the vertical dipole. In the meantime I have begin using somethi
And, as the base of the ground plane vertical is further elevated above ground a smaller portion of the near field fringes through the ground, and the efficiency increases. In the infinite height lim
Actually Jack, you can achieve a near perfect azimuthal radiation pattern with just one single radial. The trick is to run it in one direction for about 1/3 of its length, bend it 180 degrees and bac
James, that is a tough call because it is not really apples to apples. A specific answer to your question, as compared to "my" vertical dipole, then I must say I believe the raised quarter wave verti
I think you could read Gordo's comments as intending to say there is more efficiency, and hence more signal power radiated at the optimum (low angle for a vertical), if you have a good near field gro
Severns, Cebik, and others have shown that even with elevated radials, it is hard to get equal currents in each radial, due to interaction with the type of ground below the radial. While the elevated
Gordo, is Gordon West of the Gordon West radio School study disks series, and long time instructor of new hams on the west coast of USA. -Stuart K5KVH _______________________________________________
Author: "Dr. Gerald N. Johnson" <geraldj@weather.net>
Date: Thu, 06 Jan 2011 16:12:02 -0600
Probably in the real world about 2.8 dB. 73, Jerry, K0CQ _______________________________________________ TenTec mailing list TenTec@contesting.com http://lists.contesting.com/mailman/listinfo/tentec
I have found this discussion most interesting. Due to the geography of my house and lot, I am largely confined to vertical antennas on HF. I do have a tower for 6 and 2 meters, which work very well f
Stuart, That seems a very "generous" interpretation of what Gordo is quoted as saying: "What strongly affects the shape of the far-field low angle which we want? the low angle elevation pattern of a
OK, Rick, I get all that. It -IS - a difficult choice and not as clear cut as one might, at first blush, think. As I mentioned in another post, I am contemplating making either a 20 m vertical dipole
I've not had a lot of success with vertical dipoles and limited success with 1/4 verticals on 40M. However, they both have their place. I think it is important to remember what the desired results fo
Nate, My experiences lead me to go even farther. I have an elevated (10 feet above ground) Hy--Gain AV-640, which is a 3/8-wave multi-band vertical with top hats and four 6-foot counterpoise rods. My
James, I understand your concerns and it sounds like the aluminum is under-dimensioned. I also understand the wish to use what you have, but that might actually be a bad idea, depending on what you w
Very good practical analogy Nate. Bottom line, you need two antennas (per band); one for DX and one for NVIS. Actually, for 20m and above you only need a DX antenna. On the 70' high horizontal dipole
Rick (NJ0IP / DJ0IP), How did you deal with bringing the feedline away perpendicular to the vertical dipole? I have many tall trees, but routing a high feedline perpendicular to the VD is quite a cha
Jack, My feedpoint was at about 35' (the base of the pole was elevated about 5'). I had a fairly large yard and the antenna was about 50 or 60 ft. from the house. What I did was hook a small Kevlar r
WHOA... RICK... You understand my position exactly. -- Exactly. Darn it... At least the 6 and 10 meter versions turned out well. It is just that the 20 meter version is, as you say, under-dimensioned
Author: "Dr. Gerald N. Johnson" <geraldj@weather.net>
Date: Fri, 07 Jan 2011 21:33:15 -0600
You can solve your willowy tubing with stay wire braces, probably want to use a poly rope instead of wire. Stay wire braces have been used on slim masts, elevator legs (for grain transfer at an angle
Can you provide a link or reference to that Mfr in Sweden ? Thanks. == K8JHR == == _______________________________________________ TenTec mailing list TenTec@contesting.com http://lists.contesting.co