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1. Topband: shunt fed tower - question? (score: 1): Author: "N2TK, Tony" <tony.kaz@verizon.net>; Date: Sun, 01 Jan 2006 10:45:18 -0500; I am using a shunt fed Rohn 45 tower for topband. Presently I have one #12 copper wire 24" from one corner of the tower as the shunt. I would like to try to increase the bandwidth. Presently the towe; /archives//html/Topband/2006-01/msg00003.html (7,935 bytes)
2. Re: Topband: shunt fed tower - question? (score: 1): Author: herbs@surfvi.com; Date: Tue, 3 Jan 2006 11:15:16 -0400; Quoting "N2TK, Tony" <tony.kaz@verizon.net>: Yes indeed Tony...the cage feed will increase the BW significantly. An easy way to make a cage is to just drop wire from the towers top guy wires using in; /archives//html/Topband/2006-01/msg00018.html (7,711 bytes)
3. Re: Topband: shunt fed tower - question? (score: 1): Author: herbs@surfvi.com; Date: Tue, 3 Jan 2006 13:41:45 -0400; To add to my earlier post the cage in my case is only supported by guy wires insulated from the tower. The wire skirt tap point in my case is at 41 feet with an A3 at the top of the Rohn 45 tower. I; /archives//html/Topband/2006-01/msg00021.html (8,208 bytes)
4. Re: Topband: shunt fed tower - question? (score: 1): Author: "Tom Rauch" <w8ji@contesting.com>; Date: Tue, 3 Jan 2006 13:40:00 -0500; 4.1 and then went B/W can also be the same cage That data has appeared in Ham publications for many years. I measured a coaxial dipole antenna in the early 70's, when an employee of mine started tel; /archives//html/Topband/2006-01/msg00022.html (8,969 bytes)
5. Topband: shunt fed tower - question? (score: 1): Author: Bill Tippett <btippett@alum.mit.edu>; Date: Tue, 03 Jan 2006 14:25:41 -0500; If we add a second conductor spaced well away from the first, the unit-length inductance is reduced anv BW is increased. At the same time voltage across the capacitor is reduced, and bandwidth is inc; /archives//html/Topband/2006-01/msg00023.html (7,719 bytes)
6. Re: Topband: shunt fed tower - question? (score: 1): Author: herbs@surfvi.com; Date: Wed, 4 Jan 2006 10:07:37 -0400; Quoting Donald Chester <k4kyv@hotmail.com>: Indeed it is and I should have checked but many edirect eMails are asking to look at this. I have a printed copy of the paper which I will try to scan for; /archives//html/Topband/2006-01/msg00032.html (10,737 bytes)
7. Topband: shunt fed tower - question? (score: 1): Author: Bill Tippett <btippett@alum.mit.edu>; Date: Wed, 04 Jan 2006 09:42:55 -0500; KV4FZ: increase B/W. I wonder if two conductors will obtain the "shielded from the outside world" effect referred to above? Does it make any difference? Changed my mind since it's not clear to me it; /archives//html/Topband/2006-01/msg00034.html (7,288 bytes)
8. Re: Topband: shunt fed tower - question? (score: 1): Author: "Tom Rauch" <w8ji@contesting.com>; Date: Wed, 4 Jan 2006 10:29:15 -0500; conductor shunt feed to "shielded from the difference? It makes no difference at all. A basic principle of RF is that common mode current always moves to the outside area of a conductor. The effect; /archives//html/Topband/2006-01/msg00038.html (8,811 bytes)
9. Re: Topband: shunt fed tower - question? (score: 1): Author: "Tom Rauch" <w8ji@contesting.com>; Date: Wed, 4 Jan 2006 10:31:58 -0500; would Would A "wider" shunt might increase BW, because it is certainly part of the overall selectivity or Q of the array. At some point, however, the parasitic elements will dominate the bandwidth.; /archives//html/Topband/2006-01/msg00039.html (7,682 bytes)
10. Topband: shunt fed tower - question? (score: 1): Author: Dennis OConnor <ad4hk2004@yahoo.com>; Date: Thu, 5 Jan 2006 04:54:19 -0800 (PST); Herb, my suspicion is that two drop wires will act more like a folded dipole than acting like a full skirt... I expect it will take a minimum of three wires at 120 degree spacing to begin to act lik; /archives//html/Topband/2006-01/msg00065.html (8,584 bytes)

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