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## [TowerTalk] Re: 80 Meter Hybrid Triangle Loop

 To: Tom Rauch ,Tower Talk [TowerTalk] Re: 80 Meter Hybrid Triangle Loop K0PYK Sun, 7 Nov 2004 06:53:45 -0800 (PST)
 ```Thanks Tom for the comments, Hopefully I can help you with my thought process...I realize that I am not very technically savvy in antenna theory. This is why I rely on people like you, Cebik, TowerTalk and others to keep me pointed in the right direction. * First...of all I kind of like loops. I have a 40 meter vertical oriented n/s and fed at the bottom. Out plays the dipole hands down. So I thought I would try another one...that is 80 meter and orient it e/w. I have some nice 60 foot trees to work with in that orientation. * 2nd...I am on a city lot so an antenna with multiband versatility, within range of the rigs internal tuner is a consideration. It is my understanding that from the antennas design frequency, you can go up 1 band (that is 80-160) and down 2-3 (80-40-20) without 2 many problems. I know that he who dies with the wire in the air wins...I do want to maximize my choices and limit the overall number of antennas. * 3rd...The configuration of this hybrid loop provided an easy feed point, laid out nicely in trees, and was vertical in nature. The feed point in the article allowed some vertical and horizontal polarization. Best of both worlds...which from your comments may be an impossibility. * 4th...At this point I do not know how to model antennas. This puts me at a disadvantage with regards to deseminating the information currently available. A good tutorial would help. * 5th...Gain with a loop at its fundamental frequency is basically equal to that of a dipole. A loop is quieter by nature and is readily seen when switching back and forth with the dipole. The data says that gain is achieved when you go to multiples of the fundamental frequency, but will be off the lobes. * 6th...Feedline configuration as a part of the antenna "System" does make sense. I will look at my 2004 Antenna Handbook on the subject of TLA when I get home. * 7th...Given the site, trees available, distance between endpoints, +/- 55' height, and location to house/shack, a vertical loop is do able. I have the thought process that anyone can put up a dipole, but not everyone can put up a loop (much less a vertical loop). If there is something else better suited for my situation...I am open to suggestions. * 8th...I can change the configuration to a rectangle loop, lets say 35' vertical ends by 106.5' top and bottom...fed vertically or horizontally. I also could configure a delta loop with apex down...112' top and 85.5' legs. I understand that these would be 100 ohm impedance and could be fed with 1/4 wave of 72 ohm coax. * 9th...I have printed out your articles and will review them. * 10th...I am designing for 3.55, which would work well for psk31 and would be multiples of 7.1, 14.2, and 28.4. Thanks again for making me think about this and helping me learn. Tom, K0PYK __________________________________ Do you Yahoo!? Check out the new Yahoo! Front Page. www.yahoo.com _______________________________________________ See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless Weather Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any questions and ask for Sherman, W2FLA. _______________________________________________ TowerTalk mailing list TowerTalk@contesting.com http://lists.contesting.com/mailman/listinfo/towertalk ```
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