Re: Topband: Inverted L question
Snip: I am right now using an inverted L which is spaced about 4 feet away from my tower. The vertical leg is about 85 feet. I remember a number of years ago talking with Jeff Briggs (K1ZM) about ideas for my first inverted-L while we were both waiting for flights out of the Dayton Hamvention. Like you I wanted to use my tower as a support and Jeff suggested that the vertical wire be at least 15-feet away from the tower. In short I did what Jeff suggested and the antenna worked well. As an alternative you can also detune the tower. Snip: I only have 6 radials at the present time Now here is the question The horizontal leg is about 50 feet and goes to my back yard. Since the trees are not that high, it probably slopes down to 40 feet at the far end The horizontal wire faces west.. Would it help me to face that wire to the south for east west signals on transmit. I would not lose too much sleep on your horizontal wire and the specific direction thats its pointing. In theory there is a very small amount of gain in the opposite direction to that of the horizontal wire. If you model this there is only about a 1.5 DB F/B ratio, certainly nothing to write home about. Since the inverted-L is a shortened vertical it benefits from a good ground system so I would definitely add some more radials. 73, Les, N1SV ___ Stew Perry Topband Distance Challenge coming on December 29th.
Topband: Inverted l or 4 square?
If I can support a wire antenna at 50' or maybe more in tall pine trees and have 1.9 acres of space to use which would work best. Lots of tall pine trees on the lot. I assume the trees in the center of the square will really not be an interfearing factor. If I feed with window line will it work well for a multiband antenna? I assume the inverted l will need long radials to work well and that is possable, does the square antenna also need radials and if so how oriented? Prospected area of installatiion south Florida. ___ Stew Perry Topband Distance Challenge coming on December 29th.
Topband: I meant a full wave loop instead of a 4 square.
I meant a full wave loop If I can support a wire antenna at 50' or maybe more in tall pine trees and have 1.9 acres of space to use which would work best. Lots of tall pine trees on the lot. I assume the trees in the center of the square will really not be an interfearing factor. If I feed with window line will it work well for a multiband antenna? I assume the inverted l will need long radials to work well and that is possable, does the square antenna also need radials and if so how oriented? Prospected area of installatiion south Florida. ___ ___ Stew Perry Topband Distance Challenge coming on December 29th.
Topband: KLM antennas on shunt fed towers
Anyone have problems running a KLM antenna with the 4:! balun and elements insulated from the boom (stock KLM config) on a shunt fed tower for 160? I ask because I have a 6 element 10 on the top of my shunt fed tower and now, after running a kw on 160, the antenna's swr has gone over 2:1 where before it was pretty flat at about 1.2:1 or so. Any ideas? Thanks Ron N4XD ___ Stew Perry Topband Distance Challenge coming on December 29th.
