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Total 10 documents matching your query.

1. Topband: 160 Shunt-Fed Tower Readings (score: 1): Author: Larry K4AB <larry.k4ab@gmail.com>; Date: Wed, 10 Dec 2014 13:41:03 -0600; The antenna is a 94' Rohn 25, with a Force 12 24'boom Delta 6BA on top. Note that the elements are insulated from the boom. The base of the tower is grounded. 73 radials are attached to the base rang; /archives//html/Topband/2014-12/msg00217.html (6,990 bytes)
2. Re: Topband: 160 Shunt-Fed Tower Readings (score: 1): Author: Herbert Schoenbohm <herbs@vitelcom.net>; Date: Wed, 10 Dec 2014 16:53:38 -0400; You may be able to improve the antennas performance by taking the out side insulated elements at the center to the boom with hand wound chokes that pass only below 5 Mhz or lower to provide some top; /archives//html/Topband/2014-12/msg00219.html (8,147 bytes)
3. Re: Topband: 160 Shunt-Fed Tower Readings (score: 1): Author: "Charlie Cunningham" <charlie-cunningham@nc.rr.com>; Date: Wed, 10 Dec 2014 17:11:44 -0500; could improve the antenna noticeably! Why do you feel a need to improve it? I appears to be resonant, well-matched and it appears to have an excellent ground image system! I think you might be kiddi; /archives//html/Topband/2014-12/msg00221.html (8,556 bytes)
4. Re: Topband: 160 Shunt-Fed Tower Readings (score: 1): Author: Larry K4AB <larry.k4ab@gmail.com>; Date: Wed, 10 Dec 2014 17:13:46 -0600; Thanks for the response, Charlie! I'm concerned about a few things: 1) I'm thinking the antenna is electrically too short. After all, the Yagi at the top really isn't adding too much top loading. An; /archives//html/Topband/2014-12/msg00225.html (10,171 bytes)
5. Re: Topband: 160 Shunt-Fed Tower Readings (score: 1): Author: "Tom W8JI" <w8ji@w8ji.com>; Date: Wed, 10 Dec 2014 18:50:54 -0500; I'm concerned about a few things: 1) I'm thinking the antenna is electrically too short. After all, the Yagi at the top really isn't adding too much top loading. And I'm thinking adding a couple of t; /archives//html/Topband/2014-12/msg00226.html (8,847 bytes)
6. Re: Topband: 160 Shunt-Fed Tower Readings (score: 1): Author: Larry K4AB <larry.k4ab@gmail.com>; Date: Wed, 10 Dec 2014 18:09:37 -0600; That's a great question. Where is the analyzer actually getting that reading? 73, Larry K4AB _________________ Topband Reflector Archives - http://www.contesting.com/_topband; /archives//html/Topband/2014-12/msg00227.html (9,459 bytes)
7. Re: Topband: 160 Shunt-Fed Tower Readings (score: 1): Author: "Charlie Cunningham" <charlie-cunningham@nc.rr.com>; Date: Wed, 10 Dec 2014 19:56:11 -0500; Hi, again, Larry, Well, first of all the shunt feed, being a shorted transmission line, < 1/4 wavelength in extent, would present an inductive resent at the feed point that you are correctly cancelli; /archives//html/Topband/2014-12/msg00228.html (12,548 bytes)
8. Re: Topband: 160 Shunt-Fed Tower Readings (score: 1): Author: "Charlie Cunningham" <charlie-cunningham@nc.rr.com>; Date: Wed, 10 Dec 2014 20:15:53 -0500; N0!! That's the equivalent series capacitance that correspond to -j5.6ohms capacitive reactance! It would be much clearer if the analyzer would present it in that form, since it clearly has determine; /archives//html/Topband/2014-12/msg00229.html (10,756 bytes)
9. Re: Topband: 160 Shunt-Fed Tower Readings (score: 1): Author: Larry K4AB <larry.k4ab@gmail.com>; Date: Wed, 10 Dec 2014 19:23:28 -0600; TU, Charlie on a great explaination for us non-engineers! The topband reflector is a great resource for guys like me trying to understand this band, even after decades in the hobby. And yes, I'm work; /archives//html/Topband/2014-12/msg00230.html (14,284 bytes)
10. Re: Topband: 160 Shunt-Fed Tower Readings (score: 1): Author: "Charlie Cunningham" <charlie-cunningham@nc.rr.com>; Date: Wed, 10 Dec 2014 21:29:32 -0500; You're quite welcome, Larry! Hope it helped! You're certainly on the right track and doing some good work! FB on the Beverages!! Wish I had real estate for beverages, but I live on a city lot, so I h; /archives//html/Topband/2014-12/msg00234.html (15,447 bytes)

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