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Total 15 documents matching your query.

1. [TowerTalk] 80m DX special dipole (score: 1): Author: Guido Tedeschi <guidoted@gmail.com>; Date: Tue, 11 Sep 2018 21:27:19 +0200; I built an 80m DX special dipole. http://1vc.typepad.com/ethergeist/2011/01/a-broadband-contest-antenna-for-80m.html I used the Messi & Paoloni BROAD-PRO 50/C cable instead of RG213 (https://messi.it; /archives//html/Towertalk/2018-09/msg00022.html (7,381 bytes)
2. Re: [TowerTalk] 80m DX special dipole (score: 1): Author: Guido Tedeschi <guidoted@gmail.com>; Date: Tue, 11 Sep 2018 22:37:04 +0200; Many thanks for the quick answer John. I thought that the coax cables were used as stubs, so only the impedance and velocity factor were important; but if capacitance per meter is also important the; /archives//html/Towertalk/2018-09/msg00023.html (10,522 bytes)
3. Re: [TowerTalk] 80m DX special dipole (score: 1): Author: Jim W7RY <jimw7ry@gmail.com>; Date: Tue, 11 Sep 2018 15:41:44 -0500; Sent from my wireless communicator _______________________________________________ _______________________________________________ TowerTalk mailing list TowerTalk@contesting.com http://lists.contest; /archives//html/Towertalk/2018-09/msg00024.html (9,007 bytes)
4. Re: [TowerTalk] 80m DX special dipole (score: 1): Author: Guido Tedeschi <guidoted@gmail.com>; Date: Tue, 11 Sep 2018 23:02:35 +0200; If I understood correctly the antenna, the shorted coax should be ok (15.07' same electrical lenght to have the same inductance), the shortest coax is wrong and must be 4.3' (it should be of the same; /archives//html/Towertalk/2018-09/msg00025.html (11,604 bytes)
5. Re: [TowerTalk] 80m DX special dipole (score: 1): Author: Guido Tedeschi <guidoted@gmail.com>; Date: Tue, 11 Sep 2018 23:10:45 +0200; 22.5 pF per foot Il 11/09/2018 22:41, Jim W7RY ha scritto: Sent from my wireless communicator What about capacitance per foot? 73 Jim w7ry Sent from my wireless communicator On Tue, Sep 11, 2018, 2:2; /archives//html/Towertalk/2018-09/msg00026.html (9,472 bytes)
6. Re: [TowerTalk] 80m DX special dipole (score: 1): Author: "Paul Booth" <wa6ibu@earthlink.net>; Date: Tue, 11 Sep 2018 16:51:23 -0700; Interesting antenna. Looking at the diagram, is it sloped like an inverted vee or is that just a way to fit it on the page? Paul, W6IBU I built an 80m DX special dipole. http://1vc.typepad.com/etherg; /archives//html/Towertalk/2018-09/msg00027.html (8,843 bytes)
7. Re: [TowerTalk] 80m DX special dipole (score: 1): Author: Jim Brown <jim@audiosystemsgroup.com>; Date: Tue, 11 Sep 2018 22:19:50 -0700; http://1vc.typepad.com/ethergeist/2011/01/a-broadband-contest-antenna-for-80m.html I used the Messi & Paoloni BROAD-PRO 50/C cable instead of RG213 (https://messi.it/dati/immagini/BROAD-PRO50-All6_EN; /archives//html/Towertalk/2018-09/msg00028.html (10,508 bytes)
8. Re: [TowerTalk] 80m DX special dipole (score: 1): Author: Dan Maguire <danac6la@gmail.com>; Date: Wed, 12 Sep 2018 02:58:10 -0700; AutoEZ users: If you'd like to experiment with modeling this broad-band 80m dipole see the 4th section on this page: https://ac6la.com/aecollection5.html There is a link to download an AutoEZ format; /archives//html/Towertalk/2018-09/msg00029.html (8,594 bytes)
9. Re: [TowerTalk] 80m DX special dipole (score: 1): Author: Herbert Schoenbohm <herbert.schoenbohm@gmail.com>; Date: Thu, 13 Sep 2018 11:50:44 -0300; Interesting approach and more reasonable than RG-213 hanging in the air across the yard. My XYL loves the fact that my towers are placed at the opposite ends of the property so our living room has a; /archives//html/Towertalk/2018-09/msg00031.html (10,974 bytes)
10. Re: [TowerTalk] 80m DX special dipole (score: 1): Author: "Joe Subich, W4TV" <lists@subich.com>; Date: Thu, 13 Sep 2018 12:00:03 -0400; On 2018-09-13 10:50 AM, Herbert Schoenbohm wrote: If I recall it had a flat top with three instead of one vertical drop wire. One drop wire was in the exact center and the other drop wires were each; /archives//html/Towertalk/2018-09/msg00032.html (9,283 bytes)
11. Re: [TowerTalk] 80m DX special dipole (score: 1): Author: Jim Brown <jim@audiosystemsgroup.com>; Date: Thu, 13 Sep 2018 10:20:46 -0700; On 9/13/2018 9:00 AM, Joe Subich, W4TV wrote: Herb, if the drop wires are equal distant either side of center, it would effectively be equivalent to a "fat" vertical element (drop wire). If you don; /archives//html/Towertalk/2018-09/msg00033.html (9,383 bytes)
12. Re: [TowerTalk] 80m DX special dipole (score: 1): Author: "Richard (Rick) Karlquist" <richard@karlquist.com>; Date: Thu, 13 Sep 2018 12:54:10 -0700; It should be possible to broadband your vertical using lumped element circuits at the base. You would need to model or measure the base impedance vs frequency and then find the element values by tria; /archives//html/Towertalk/2018-09/msg00034.html (9,151 bytes)
13. Re: [TowerTalk] 80m DX special dipole (score: 1): Author: Tom Osborne <w7why1@gmail.com>; Date: Thu, 13 Sep 2018 15:03:54 -0700; That is what I do here. Using an old Johnson Matchbox and the antenna works like gangbusters on ALL bands. 73 Tom W7WHY _______________________________________________ ______________________________; /archives//html/Towertalk/2018-09/msg00035.html (9,598 bytes)
14. Re: [TowerTalk] 80m DX special dipole (score: 1): Author: Jim Brown <jim@audiosystemsgroup.com>; Date: Thu, 13 Sep 2018 15:15:46 -0700; It might be easier, but it isn't as good. The problem is that antennas like that cannot be choked to kill RX noise. And most of us live where that matters. 73, Jim K9YC That is what I do here. Using; /archives//html/Towertalk/2018-09/msg00036.html (10,575 bytes)
15. Re: [TowerTalk] 80m DX special dipole (score: 1): Author: "Joe Subich, W4TV" <lists@subich.com>; Date: Thu, 13 Sep 2018 18:30:26 -0400; In this case the station is operated remotely. It is not practical to adjust a manual antenna tuner! 73, ... Joe, W4TV That is what I do here. Using an old Johnson Matchbox and the antenna works like; /archives//html/Towertalk/2018-09/msg00037.html (9,678 bytes)

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