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Total 15 documents matching your query.

1. [Towertalk] force 12 sigma 80 (score: 1): Author: vze2298x@verizon.net (Bob Jaeger); Date: Tue, 10 Dec 2002 15:24:11 -0500 (Eastern Standard Time); Hi the name is Bob . I am looking for someone is has mounted a sigma 8= 0 about ten feet in the air . I=0D have some questions about doing this and its success . This can be done offline rather than; /archives//html/Towertalk/2002-12/msg00326.html (6,878 bytes)
2. [Towertalk] force 12 sigma 80 (score: 1): Author: k4oj@tampabay.rr.com (Jim White, K4OJ); Date: Tue, 10 Dec 2002 16:29:49 -0500; I am proud owner of a 80 BV from Force 12 - do not know if it is similar in design - the BV uses a tringular wire loading loop to make it look taller (lower in Freq) - it is mounted on an aluminum tu; /archives//html/Towertalk/2002-12/msg00331.html (8,089 bytes)
3. [TowerTalk] Force 12 Sigma 80 (score: 1): Author: bnowak@telocity.com (Brad Nowak); Date: Mon, 21 Jan 2002 12:38:37 -0500; Hello all; Have any readers had experience with Force 12 Sigma 80??? I am considering a vertical due to small lot and dissatisfaction with my inverted vee for DX. The info on F 12's site looks intere; /archives//html/Towertalk/2002-01/msg00453.html (8,301 bytes)
4. [TowerTalk] Force 12 Sigma 80 (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Mon, 21 Jan 2002 15:55:41 -0500; Why not just build a vertical Brad? While linear loading is generally not as efficient as lumped loading using properly designed inductors or a small capacitance hat/inductor combination, you'd almo; /archives//html/Towertalk/2002-01/msg00458.html (9,378 bytes)
5. [TowerTalk] Force 12 Sigma 80 (score: 1): Author: ve9aa@nbnet.nb.ca (Mike & Coreen Smith); Date: Mon, 21 Jan 2002 19:41:26 -0400; Brad, (& group) My 80m vertical cost me practically nothing and I'd pitch it against a Commerical design any day of the week. It's a very simple 5/16th WL inverted L( #12AWG stranded R90 wire) thrown; /archives//html/Towertalk/2002-01/msg00463.html (11,004 bytes)
6. [TowerTalk] Force 12 Sigma 80 (score: 1): Author: petrich@u.washington.edu (John Petrich); Date: Mon, 21 Jan 2002 16:34:26 -0800; Brad and the group, Read with interest the postings on the Sigma 80 vertical and the related discussions about home made verticals, wires in trees, etc. There are at least two different issues to con; /archives//html/Towertalk/2002-01/msg00466.html (15,410 bytes)
7. [TowerTalk] Force 12 Sigma 80 (score: 1): Author: n4kg@juno.com (n4kg@juno.com); Date: Mon, 21 Jan 2002 19:19:53 -0600; Tree trunks have little or NO effect on HF antennas. My 80M wire vertical in the woods was 'good enough' to work XZ0A at sunset on the Long Path. I was NOT able to get through to XZ0A using my elevat; /archives//html/Towertalk/2002-01/msg00468.html (9,741 bytes)
8. [TowerTalk] Force 12 Sigma 80 (score: 1): Author: k4sqr@juno.com (Jim Miller); Date: Tue, 22 Jan 2002 06:15:57 -0500; Does the Sigma series not require a "base post" in concrete? Read it somewhere before on the first model but will check the Force 12 web site later. If the concrete base is not used, it seems the 90; /archives//html/Towertalk/2002-01/msg00479.html (10,507 bytes)
9. [TowerTalk] Force 12 Sigma 80 (score: 1): Author: bnowak@telocity.com (Brad Nowak); Date: Tue, 22 Jan 2002 07:35:37 -0500; I wish to thank all who replied with their ideas. The consensus is that $600 is WAY too much to pay for a vertical (no surprise). I will now consider shunt feeding, MFJ or even home brew (I'm not ver; /archives//html/Towertalk/2002-01/msg00480.html (8,764 bytes)
10. [TowerTalk] Force 12 Sigma 80 (score: 1): Author: k_tieff@yahoo.no (Kondra Tieff); Date: Tue, 22 Jan 2002 18:07:25 +0100 (CET); Just a little side comment to this discussion; Brad was considering the Sigma80, a center-fed vertical **dipole** for 80 meters, which does not need any form for counterpoise or radial system. In ord; /archives//html/Towertalk/2002-01/msg00484.html (9,097 bytes)
11. [TowerTalk] Force 12 Sigma 80 (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Tue, 22 Jan 2002 14:16:51 -0500; Not speaking of any vertical antenna in particular, but all vertical antennas in general we have to be careful! We can feed power into a short vertical dipole mounted near earth and it will have a l; /archives//html/Towertalk/2002-01/msg00486.html (10,136 bytes)
12. [TowerTalk] Force 12 Sigma 80 (score: 1): Author: k2av@contesting.com (Guy Olinger, K2AV); Date: Tue, 22 Jan 2002 18:46:26 -0500; There are THREE variants of losses to a vertical system related to the ground. 1) resistance loss from using the ground as 1/2 of the circuit for a traditional, base-fed vertical. Consider the dirt a; /archives//html/Towertalk/2002-01/msg00487.html (12,575 bytes)
13. [TowerTalk] Force 12 Sigma 80 (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Tue, 22 Jan 2002 21:44:49 -0500; I enjoyed your ground loss comments, and mostly agree with them. I'm not speaking of any antenna brand in particular, but only of system in general. there is no magic bullet. But here are some intere; /archives//html/Towertalk/2002-01/msg00488.html (11,190 bytes)
14. [TowerTalk] Force 12 Sigma 80 (score: 1): Author: k2av@contesting.com (Guy Olinger, K2AV); Date: Wed, 23 Jan 2002 01:00:14 -0500; system in general. there is no magic bullet.... Making a dipole out of a Marconi-feed structure of given dimensions quadruples the amount of loading reactance required, all things equal. That quadrup; /archives//html/Towertalk/2002-01/msg00495.html (11,756 bytes)
15. [TowerTalk] Force 12 Sigma 80 (score: 1): Author: w0yk@msn.com (J. Edward (Ed) Muns); Date: Thu, 24 Jan 2002 07:25:17 -0800; I've had a Sigma 80 in operation for 4 months and love it. It is mounted HORIZONALLY on a rotor at 80' here at my ridgetop location. (You would obviously want it higher in locations with flatter fore; /archives//html/Towertalk/2002-01/msg00513.html (10,369 bytes)

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