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#1
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On Sun, 15 May 2005 12:28:19 -0500, "Joe S."
wrote: Just put the goddam wire up in the air, tie some kind of feedline to it, run it through the antenna tuner, tune for zereo reflected power and make contacts. All else is bull****. You have such a wonderful command of the English language ;-0 |
#2
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Joe S. wrote:
SNIPPED Just put the goddam wire up in the air, tie some kind of feedline to it, run it through the antenna tuner, tune for zereo reflected power and make contacts. All else is bull****. And engineers discussed this thread ad nausea!! Put up an antenna, tune it, get on the air |
#3
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Joe S. wrote:
Holy ****!!! I just read this entire thread and it has rapidly deteriorated into a pile of nonsense. It's a Zepp on one band but not on another but then it's a windom no it's not yes it is why not becasue yadda yadda. Having a hard time keeping up? Remember this: Engineers designed the Titanic. Engineers also designed the sky bridge at the Kansas City Raddison and engineeers desigend the roof of the Hartford Civic Center. And engineers design antennas. Yeah, they do. And it's in fully understanding what is happening that avoids disasters too. It's okay, you're special too. Just put the goddam wire up in the air, tie some kind of feedline to it, run it through the antenna tuner, tune for zereo reflected power and make contacts. All else is bull****. Or, in your case, just order your antenna from a vendor in the back of QST and hang it in the back yard, jump on 75 meters and make farting noises all night with your drunken buddies. "I don't care how it works, just as long as it works". Which is fine, but don't denegrate others because they want to discuss it. Don't like it, ignore the thread. HTH |
#4
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A Windom, a true Windom, is 1/2 wavelength long and fed 37% off of one
end with a SINGLE wire [not coax, not 450 ohm line, nothing but a single wire]. There is no such thing as an end fed windom. There is an end fed 1/2 wavelength DIPOLE that can be fed with 450 ladder line or 600 ohm open wire feeders and a good balanced line tuner. It will work on the fundamental and all even harmonics. So, a 130 foot dipole end fed with 600 or 450 line and a balanced tuner will work just fine on 80, 40, 20, and 10 meters. GeorgeF wrote: I am currently using a 150' randomwire for 80 & 40 meters. Its connected to the "wire" terminal of an MFJ-949 tuner. Been happy so far with the conntacts made. I'm considering taking an turning it into an endfeed windom simply by running 450 ohm ladder line from the MFJ-949 to the top of my 30' mast which current supports the randomwire. I'll be cutting the randomwire at the mast and soldering one side of the 450 line while letting the otherside of the 450 line not attached to anything. Is there any advantage of doing this? Basically I'm taking a 150' randomwire and turning it into about a 120' endfeed windom, will it be worth the effort? George |
#5
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Hello George,
On my first reading, I imagined that you were considering replacing the 30-foot, single-wire, vertical wire running from your tuner to a 120-foot horizontal wire with a 30-foot length of ladder line. Based on the responses so far, I wonder if I correctly understood the question. If my understanding of your question is correct, you now have something like an inverted-L, with potentially significant radiation from the vertical portion. Changing the single wire to ladder line would probably cancel most or all of the vertically polarized radiation and would probably do little to improve the radiation from the horizontal wire. You won't get much low-angle radiation from a horizontal antenna at 30 feet, no matter how you feed it. It is difficult to say whether you would notice an improvement with your contemplated change. I'm inclined to think not. A better move might be to consider putting down some radials. What frequencies are involved here? Also, as some of the responses suggest, there are divergent views on the end-fed Zepp. Be interested to hear how others see this. Good luck. Chuck GeorgeF wrote: I am currently using a 150' randomwire for 80 & 40 meters. Its connected to the "wire" terminal of an MFJ-949 tuner. Been happy so far with the conntacts made. I'm considering taking an turning it into an endfeed windom simply by running 450 ohm ladder line from the MFJ-949 to the top of my 30' mast which current supports the randomwire. I'll be cutting the randomwire at the mast and soldering one side of the 450 line while letting the otherside of the 450 line not attached to anything. Is there any advantage of doing this? Basically I'm taking a 150' randomwire and turning it into about a 120' endfeed windom, will it be worth the effort? George |
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