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Total 22 documents matching your query.

1. Topband: 160M Vertical (score: 1): Author: "Jack M. Henkle" <j.henkle@verizon.net>; Date: Wed, 9 Feb 2005 19:58:03 -0800; I am interested in installing a 1/4 Wave vertical and I have a concern about possible interaction with my existing 160' tower. Because of the limitations on where I can install this new vertical, I m; /archives//html/Topband/2005-02/msg00130.html (6,898 bytes)
2. Topband: 160m vertical (score: 1): Author: mike l dormann <w7dra@juno.com>; Date: Wed, 27 Sep 2006 11:28:15 -0700; Speaking of 160 meter antennas, for the Oceania CW DX contest I will be on Kauai, Hawaii and plan to use some form of "Z" antenna ( half wave of wire, the center portion vertical, with the ends horiz; /archives//html/Topband/2006-09/msg00121.html (7,160 bytes)
3. Topband: 160M Vertical (score: 1): Author: Jim Murray <adkmurray@yahoo.com>; Date: Mon, 7 Oct 2013 17:05:16 -0700 (PDT); Hello all, Plan on working at getting back on 160 after a few years of being off the air. I last used an Inv.L and beverage. A meager configuration but served me well. I've been looking for a dece; /archives//html/Topband/2013-10/msg00069.html (6,753 bytes)
4. Topband: 160m Vertical (score: 1): Author: Ron WV4P <wv4ptn@gmail.com>; Date: Fri, 15 May 2020 10:14:32 -0500; I have built an insulated base for a 1/4 wave 160 antenna. The antenna will be XXX' of Rohn 25. In searching I see people using heights from 115' - 130' with a pretty high number around 124'. I do no; /archives//html/Topband/2020-05/msg00075.html (7,612 bytes)
5. Re: Topband: 160m Vertical (score: 1): Author: Tree <tree@kkn.net>; Date: Fri, 15 May 2020 08:18:39 -0700; Slightly shorter makes it easy to use an inductor to make up the difference. If you make it long - you can do the same with a capacitor - but it's typically more trouble than the inductor. Tree N6TR; /archives//html/Topband/2020-05/msg00076.html (8,272 bytes)
6. Re: Topband: 160m Vertical (score: 1): Author: Joe <nss@mwt.net>; Date: Fri, 15 May 2020 10:21:10 -0500; Myself I like longer, Yes gotta use a cap, But not too big a deal, I find more variable caps at hamfests than roller inductors. PLUS, longer raises the natural impedance too closer to 50 ohms. Of cou; /archives//html/Topband/2020-05/msg00077.html (9,239 bytes)
7. Re: Topband: 160m Vertical (score: 1): Author: donovanf@starpower.net; Date: Fri, 15 May 2020 11:27:49 -0400 (EDT); Hi Ron, A more reliable approach is a tuner in your shack. The extra coax cable loss from elevated VSWR is insignificant on topband. How high up the band do you want to go and at what maximum VSWR? A; /archives//html/Topband/2020-05/msg00078.html (9,321 bytes)
8. Re: Topband: 160m Vertical (score: 1): Author: Tree <tree@kkn.net>; Date: Fri, 15 May 2020 08:34:23 -0700; One approach for the inductor that I have used when doing parasitic element tuning is to put two SO239's in series and either put a shorted plug in for no added inductance - or a PL259 fashioned with; /archives//html/Topband/2020-05/msg00079.html (10,795 bytes)
9. Re: Topband: 160m Vertical (score: 1): Author: Ken Claerbout <kenk4zw@gmail.com>; Date: Fri, 15 May 2020 11:52:01 -0400; I would favor using an inductor. Tune it for the lowest part of the band. Then using a relay or two, you can short out turns if you want to move higher in the band. Although I think you will find usi; /archives//html/Topband/2020-05/msg00080.html (10,185 bytes)
10. Re: Topband: 160m Vertical (score: 1): Author: Joe <nss@mwt.net>; Date: Fri, 15 May 2020 11:01:57 -0500; Speaking of broadbandedness. OK, what differences would it be bandwidth wise? Where does it matter to get the wider bandwidth/ At the feedpoint? At the far end? In other words, you get broader bandwi; /archives//html/Topband/2020-05/msg00081.html (11,715 bytes)
11. Re: Topband: 160m Vertical (score: 1): Author: Ron WV4P <wv4ptn@gmail.com>; Date: Fri, 15 May 2020 11:10:36 -0500; Wow, Incredible responses in just a few min. Thanks ! This antenna will be used 90% for Contesting, but 5 days a week it will be for casual DX on CW and SSB. With the switching matrix I'm using at th; /archives//html/Topband/2020-05/msg00082.html (13,580 bytes)
12. Re: Topband: 160m Vertical (score: 1): Author: fmoeves <fmoeves@twc.com>; Date: Fri, 15 May 2020 13:19:43 -0400; Tree, Thank you very good idea. One more reason to hang out here. I used the Harpin match as Jay mentioned on my inverted L worked great. 73 Fred KB4QZH -- Original message --From: Tree <tree@kkn.ne; /archives//html/Topband/2020-05/msg00084.html (10,773 bytes)
13. Re: Topband: 160m Vertical (score: 1): Author: Kees Nijdam <clnijdam@knid.nl>; Date: Fri, 15 May 2020 19:52:50 +0200; If you have a quater wave vertical resonating on 1,9 Mhz, the swr 1:2 bandwith will be > 200 kHz. Even if your feedline has 3 dB attenuation (that is a lot on this band), the additional loss will be; /archives//html/Topband/2020-05/msg00085.html (12,256 bytes)
14. Re: Topband: 160m Vertical (score: 1): Author: Dave Cuthbert <telegrapher9@gmail.com>; Date: Fri, 15 May 2020 08:09:26 -1000; Aloha Ron. EZNEC ROHN25 model: 128' resonant at 1.796 MHz, 35 +j0 ohms 115' resonant at 2.000 MHz, 35 +j0 ohms 115', 1.800 MHz, 25 -j46 ohms 115' 1.800 MHz, 4.1 uH base series inductor, 25 +j0 ohms D; /archives//html/Topband/2020-05/msg00086.html (15,647 bytes)
15. Re: Topband: 160m Vertical (score: 1): Author: Jim Brown <jim@audiosystemsgroup.com>; Date: Fri, 15 May 2020 11:12:56 -0700; I strongly agree with this. Another suggestion. Do your best with what you can rig, using as much top-loading as practical rather than base loading. Sweep the feedpoint Z with a good analyzer, export; /archives//html/Topband/2020-05/msg00087.html (8,904 bytes)
16. Re: Topband: 160m Vertical (score: 1): Author: Dave Cuthbert <telegrapher9@gmail.com>; Date: Fri, 15 May 2020 09:40:39 -1000; EZNEC Rohn 25 top loading 115' Rohn 25 4 spoke top hat, 66" x 0.500" tubing SWR in a 30 ohm system (match 30 ohms to 50 ohms) 1.800 MHz, 2.2:1 1.900 MHz, 1.2:1 2.000 MHz, 2.2:1 KH6AQ (formerly WX7G); /archives//html/Topband/2020-05/msg00089.html (9,123 bytes)
17. Re: Topband: 160m Vertical (score: 1): Author: "List Mail" <mail10@barefoothorse.com.au>; Date: Sat, 16 May 2020 09:54:57 +1000; EZNEC ROHN25 model: 128' resonant at 1.796 MHz, 35 +j0 ohms 115' resonant at 2.000 MHz, 35 +j0 ohms 115', 1.800 MHz, 25 -j46 ohms 115' 1.800 MHz, 4.1 uH base series inductor, 25 +j0 ohms Dave KH6AQ -; /archives//html/Topband/2020-05/msg00091.html (8,767 bytes)
18. Re: Topband: 160m Vertical (score: 1): Author: donovanf@starpower.net; Date: Fri, 15 May 2020 23:50:50 -0400 (EDT); Thanks for your kind comments Ron, much appreciated. Hope to meet you in Dayton in 2021 73 Frank W3LPL -- Original Message -- Wow, Incredible responses in just a few min. Thanks ! This antenna will b; /archives//html/Topband/2020-05/msg00092.html (13,964 bytes)
19. Re: Topband: 160m Vertical (score: 1): Author: Rob Atkinson <ranchorobbo@gmail.com>; Date: Sat, 16 May 2020 06:31:43 -0500; ""A more reliable approach is a tuner in your shack. The extra coax cable loss from elevated VSWR is insignificant on topband."" We don't really have enough information to make that claim. First, you; /archives//html/Topband/2020-05/msg00093.html (8,414 bytes)
20. Re: Topband: 160m Vertical (score: 1): Author: "Richard (Rick) Karlquist" <richard@karlquist.com>; Date: Sat, 16 May 2020 10:55:53 -0700; ""A more reliable approach is a tuner in your shack. The extra coax cable loss from elevated VSWR is insignificant on topband."" Another disadvantage of a tuner at the shack end is that the match ban; /archives//html/Topband/2020-05/msg00094.html (8,970 bytes)

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