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Total 11 documents matching your query.

1. [TowerTalk] short multiband dipole and 'isolation coils' (score: 1): Author: Gary Slagel <gdslagel@yahoo.com>; Date: Sun, 14 Dec 2008 07:55:41 -0800 (PST); I'm looking at a 124' 160/80/40 multiband dipole from Hi Power antennas. Looks like a good product and reviews on eham are good. It uses isolation coils rather then traps. I'm not familiar with is; /archives//html/Towertalk/2008-12/msg00396.html (7,552 bytes)
2. Re: [TowerTalk] short multiband dipole and 'isolation coils' (score: 1): Author: Richards <jruing@ameritech.net>; Date: Sun, 14 Dec 2008 12:22:45 -0500; 1) a rose by any other name...... 2) Traps are not all bad. 3) I do not think the balun will alter the pattern much. 4) Don't buy anything form anybody until you read up about that type of antenna in; /archives//html/Towertalk/2008-12/msg00398.html (7,342 bytes)
3. Re: [TowerTalk] short multiband dipole and 'isolation coils' (score: 1): Author: "W5CPT" <w5cpt@bellsouth.net>; Date: Sun, 14 Dec 2008 13:56:41 -0600; I have that exact antenna hanging from my tiny tower. It works really well and it even loads nicely on 15M. I sure it would be more of a "DX Antenna" if it were higher than its' 40 feet, but I sit on; /archives//html/Towertalk/2008-12/msg00401.html (9,004 bytes)
4. Re: [TowerTalk] short multiband dipole and 'isolation coils' (score: 1): Author: K4SAV <RadioIR@charter.net>; Date: Sun, 14 Dec 2008 14:32:09 -0600; The company is the Hy Power Antenna Company, and the antenna you are refering to, I think, is the 3B4016L. Isolation coils is a term invented by the company. I think what they are doing is using a se; /archives//html/Towertalk/2008-12/msg00403.html (10,363 bytes)
5. Re: [TowerTalk] short multiband dipole and 'isolation coils' (score: 1): Author: "W7TMT" <w7tmt@dayshaw.net>; Date: Sun, 14 Dec 2008 12:45:04 -0800; If you'd like to experiment with the lumped inductance design you might want to try K7MEM's great Web site. He has a variety of on-line calculators available. Amongst them is a neat page that allows; /archives//html/Towertalk/2008-12/msg00406.html (8,408 bytes)
6. Re: [TowerTalk] short multiband dipole and 'isolation coils' (score: 1): Author: "Jim Brown" <jim@audiosystemsgroup.com>; Date: Sun, 14 Dec 2008 19:10:11 -0800; the The Hypower Antennas are good designs. I've had several of their longer ones in the air and like them a lot. They are a very good solution for limited space. See http://audiosystemsgroup.com/Limi; /archives//html/Towertalk/2008-12/msg00414.html (9,172 bytes)
7. Re: [TowerTalk] short multiband dipole and 'isolation coils' (score: 1): Author: "Jim Brown" <jim@audiosystemsgroup.com>; Date: Sun, 14 Dec 2008 19:22:20 -0800; I have MEASURED the coils on two of Barry's antennas and put them in an NEC model. They are NOT traps, they are not "isolation" coils, they are simply loading coils. The significant results of the mo; /archives//html/Towertalk/2008-12/msg00415.html (9,663 bytes)
8. Re: [TowerTalk] short multiband dipole and 'isolation coils' (score: 1): Author: "Samir Popaja" <7s7v@adamomail.se>; Date: Mon, 15 Dec 2008 20:56:24 +0100; How these antennas from The Hypower Antennas compare with antenna made with Unadilla's W2VS high performance traps on the same band, like 160/80/40 band? 73' Samir Samir Popaja, 7S7V (SM7VZX) http://; /archives//html/Towertalk/2008-12/msg00429.html (9,289 bytes)
9. Re: [TowerTalk] short multiband dipole and 'isolation coils' (score: 1): Author: Gary Slagel <gdslagel@yahoo.com>; Date: Tue, 16 Dec 2008 07:51:02 -0800 (PST); Thanks to all for the good comments on the hy power antennas. I'm going to go ahead with the antenna however I'm going to get one rather then ordering 2 right away. I had a couple comments that I w; /archives//html/Towertalk/2008-12/msg00447.html (8,971 bytes)
10. Re: [TowerTalk] short multiband dipole and 'isolation coils' (score: 1): Author: "Jim Brown" <jim@audiosystemsgroup.com>; Date: Tue, 16 Dec 2008 09:55:20 -0800; Whoever told you that is WRONG! I've got crossed dipoles in the air at 90 degrees for 80 and 40, and there are DEEP NULLS off the ends. I also have crossed dipoles on 20/15/10. Same result. In each p; /archives//html/Towertalk/2008-12/msg00453.html (9,542 bytes)
11. [TowerTalk] short multiband dipole and 'isolation coils' (score: 1): Author: "John" <fraz1@bellsouth.net>; Date: Tue, 16 Dec 2008 14:30:03 -0600; My personal experience aligns with Jim's. So does modeling. The range of 3-10db off the ends of a flat dipole is very typical. An inverted V will not typically exhibit the same level of nulls of the; /archives//html/Towertalk/2008-12/msg00472.html (7,291 bytes)

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