Stephanie: Think of your antenna as a dipole with the tower being one half of it. The tower is not a ground plane.You can expect to have to experimentally change the length of the wire to get a low S
Remember when you use a "T" tuner, always use the maximum possible capacitance and minimum inductance that provides a match. On lower bands, at least one of the capacitors should be fully meshed. So
Stephanie; 1/4w slopers can be very sensitive antennas, and need to work against good ground systems. 1. Bond a ground wire from top of tower to mast, allowing for rotation loop. 2. Run a ground wire
My view of Half Slopers, better described as Quarter Wave Slopers, is that the best way to get them to perform and provide a reasonable match to 50 ohm coax is to attach them BELOW a fairly large TOP
Changing the length is one option. Changing the included angle (the slope of the wire), also affects vswr. Assuming yours is top fed, you are likely to find the following: 1. The tower and wire do no
Les, Are you saying lift the ground at the feed point and use a piece of wire running down the tower ? Please use a diagram if possible Stephanie: I suggest using your tuner exclusively as an SWR Bri
I suggest attaching a wire at the base of the tower with some form of clamping device and running it a few inches or so ABOVE the "surface" >of the ground ?< there it will terminate near the end of t
See comments below Stephanie, for whatever it's worth, I think the best advice you have gotten so far was W8JI's suggestion that you erect an inverted L instead. The tuning of a half-sloper is just t
<snipped> Please explain what "5 or more above" implies.....There have been many others that have shared some very good results with the HALF SLOPER antenna. Sounds to me like this antenna is anythin
Well, you also need them for your half-sloper, if and when you get the SWR down. There really isn't any free lunch here. Either antenna will work without radials, but will be proportionately better w
Hi Stephanie: Again, I suggest you read ON4UN's book. I would try to put anything OTHER than a half sloper. Your tower can be easily shunt fed on 160. Try it! Jeff, KN2R This list is sponsored by the
My MFJ Tuner did not like 160, so I bought (under advisement) an Ameritron. The MFJ just smoked and sparked when attempting to tune. So I decided that the antenna was at fault. The Ameritron tunes 16
I cut my grass short and installed the radials after growing season, wiggling the wire down to the ground. Bobby pins (or bent galvanized steel or aluminum wire) can be used to hold the wires down.
Thanks Pete, Yes that is very true and I began to realized this too today with all the talk of shunt fed towers. When the weather gets a little less windy and warmer, Ill break the guys up with insul
It is also reprinted in the 18th edition of the ARRL Antenna Handbook on pg 6-11. Another way to plant radials is to use a shovel to cut a slit in the ground and lay the radial in the slit. It doesn
-Thanks for all the responses on this topic...... Stephanie R. Koles WX3K wx3k@arrl.net http://www.qsl.net/wx3k Assistant Skywarn Coordinator Somerset County, NJ Mt. Holly Skywarn Technical Committee
That was one of my normal methods of installing radials until I bought a tractor and started using a home made radial plow! Now I can bury a hundred feet of wire or coax per minute! Before having a t
Modelling is great for that. You can look at where the current is, or you can visualize it. Keep in mind there is EXACTLY the same current in the shield and the center conductor, unless the feedline
Somehow the math doesn't work out. 45 degrees at 50 feet should require about 90 feetof wire. For 128 feet, it must be shallower than 45 derees. What band? 40m? 80m? 160m? It seems too long for eithe
coax Somehow the math doesn't work out. 45 degrees at 50 feet should require about 90 feetof wire. For 128 feet, it must be shallower than 45 derees. What band? 40m? 80m? 160m? It seems too long for