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Total 18 documents matching your query.

1. [TowerTalk] Open wire lines (score: 1): Author: "David J. Sourdis" <hk1kxa@hotmail.com>; Date: Mon, 30 Nov 2009 09:01:38 -0500; I am looking for information on open wire lines. I want more than is available on the Antenna Book or the one paragraph information on LBDXing saying practically "better not". Maybe some hints a kink; /archives//html/Towertalk/2009-11/msg00514.html (7,494 bytes)
2. Re: [TowerTalk] Open wire lines (score: 1): Author: jimlux <jimlux@earthlink.net>; Date: Mon, 30 Nov 2009 07:03:21 -0800; Are you looking for equations for impedance? (There's the one equation.. Z is approximately 276*log(ratio of diameter to spacing. There's a formula involving cosh(x) that is more exact. ) http://www.; /archives//html/Towertalk/2009-11/msg00516.html (7,998 bytes)
3. Re: [TowerTalk] Open wire lines (score: 1): Author: "Paul Christensen" <w9ac@arrl.net>; Date: Mon, 30 Nov 2009 10:16:59 -0500; I've found that the best information on open wire line theory, construction, and coupling techniques comes from pre-1960 ARRL Antenna Book's, Terman's Radio Engineering Handbook, and the material fr; /archives//html/Towertalk/2009-11/msg00517.html (8,334 bytes)
4. Re: [TowerTalk] Open wire lines (score: 1): Author: "Richard (Rick) Karlquist" <richard@karlquist.com>; Date: Mon, 30 Nov 2009 07:47:15 -0800; The best book I know of is Laport: Radio Antenna Engineering. If you Google this, you will see on line pdf's available. The biggest problem I see people having with OWL is that they want to run "tune; /archives//html/Towertalk/2009-11/msg00518.html (7,581 bytes)
5. Re: [TowerTalk] Open wire lines (score: 1): Author: "Paul Christensen" <w9ac@arrl.net>; Date: Mon, 30 Nov 2009 11:24:01 -0500; It's out there -- you just have to go back in time to find it. High power and high SWR can co-exist nicely when the transmission line concepts are understood. All too often, an op chooses some rando; /archives//html/Towertalk/2009-11/msg00519.html (8,380 bytes)
6. Re: [TowerTalk] Open wire lines (score: 1): Author: "Jim Brown" <jim@audiosystemsgroup.com>; Date: Mon, 30 Nov 2009 09:55:17 -0800; Yes. It's important to analyze everything between the transmitter input and the radiation from the antenna as a SYSTEM. That includes the transmitter output stage, whatever matches it to the line, th; /archives//html/Towertalk/2009-11/msg00521.html (9,965 bytes)
7. [TowerTalk] Open wire lines (score: 1): Author: "Paul Christensen" <w9ac@arrl.net>; Date: Mon, 30 Nov 2009 13:50:19 -0500; significant unbalanced (common mode) currents if what is connected on either end is unbalanced." One method to help with a portion of the unbalance is to remote-feed the open wire line with a remote; /archives//html/Towertalk/2009-11/msg00522.html (9,007 bytes)
8. [TowerTalk] Open wire lines (score: 1): Author: n8de@thepoint.net; Date: Mon, 30 Nov 2009 14:19:48 -0500; Years ago, I stumbled, quite literally, upon an unusual scheme to feed a 160m balanced antenna with open wire using a 'swinging-link' tuner. The unusual component is that the balanced antenna feeders; /archives//html/Towertalk/2009-11/msg00523.html (8,743 bytes)
9. Re: [TowerTalk] Open wire lines (score: 1): Author: "Gene Fuller" <w2lu@rochester.rr.com>; Date: Mon, 30 Nov 2009 14:49:09 -0500; Hi Paul - I buildt a small, 100 watt, "balanced " tuner, using a "T" circuit, with "floating chassis", insulated shafts and torriod at the 50 ohm end. Judging from rf ameter readings in the balanced; /archives//html/Towertalk/2009-11/msg00524.html (11,588 bytes)
10. Re: [TowerTalk] Open wire lines (score: 1): Author: KI9A@aol.com; Date: Mon, 30 Nov 2009 14:49:41 EST; Paul, Great info, and awesome workmanship! Having said that, what are the benefits of doing all of that work, over 450 ohm ladderline, then using a well made 4:1 current balun outside the shack, and; /archives//html/Towertalk/2009-11/msg00525.html (9,899 bytes)
11. Re: [TowerTalk] Open wire lines (score: 1): Author: "Paul Christensen" <w9ac@arrl.net>; Date: Mon, 30 Nov 2009 15:47:44 -0500; Not at all if you're happy with the results. On the other hand, you may not know how much of your line is radiating due to coupling of other objects, nor the efficiency of the system unless you know; /archives//html/Towertalk/2009-11/msg00526.html (11,029 bytes)
12. Re: [TowerTalk] Open wire lines (score: 1): Author: "Paul Christensen" <w9ac@arrl.net>; Date: Mon, 30 Nov 2009 15:51:45 -0500; I guess the Towertalk reflector cannot pass extended ASCII characters. The Z02 is actually Zo squared and not Zo * 2. I tried to send a raised "2" but no go. Paul, W9AC _____________________________; /archives//html/Towertalk/2009-11/msg00527.html (7,768 bytes)
13. Re: [TowerTalk] Open wire lines (score: 1): Author: "Roger (K8RI)" <K8RI-on-TowerTalk@tm.net>; Date: Mon, 30 Nov 2009 17:41:29 -0500; Try ZO^2 which is an accepted way of writing exponents when the super script is not available. 73 Roger (K8RI) _______________________________________________ ________________________________________; /archives//html/Towertalk/2009-11/msg00528.html (8,940 bytes)
14. Re: [TowerTalk] Open wire lines (score: 1): Author: "Rick Karlquist" <richard@karlquist.com>; Date: Mon, 30 Nov 2009 15:03:14 -0800; You can also try holding down the "Alt" key while typing "253" or "0178" on the numeric pad. I'll try it here and see if it survives the reflector: Zo² I'm seeing a superscript 2 in my plain text mai; /archives//html/Towertalk/2009-11/msg00530.html (10,321 bytes)
15. Re: [TowerTalk] Open wire lines (score: 1): Author: "Roger (K8RI)" <K8RI-on-TowerTalk@tm.net>; Date: Mon, 30 Nov 2009 19:02:10 -0500; Hmm... Interesting, I didn't expect to actually end up with a superscript. I used the "up arrow" to indicate superscript and the posting actually turned it into superscript. 73 Roger (K8RI) _________; /archives//html/Towertalk/2009-11/msg00535.html (9,838 bytes)
16. Re: [TowerTalk] Open wire lines (score: 1): Author: "Paul Christensen" <w9ac@arrl.net>; Date: Mon, 30 Nov 2009 19:05:13 -0500; That worked Karl. Tnx! Paul, W9AC You can also try holding down the "Alt" key while typing "253" or "0178" on the numeric pad. I'll try it here and see if it survives the reflector: Zo² I'm seeing a; /archives//html/Towertalk/2009-11/msg00536.html (10,781 bytes)
17. Re: [TowerTalk] Open wire lines (score: 1): Author: "Paul Christensen" <w9ac@arrl.net>; Date: Mon, 30 Nov 2009 19:07:50 -0500; Sorry, meant Rick, N6RK. Paul, W9AC That worked Karl. Tnx! Paul, W9AC You can also try holding down the "Alt" key while typing "253" or "0178" on the numeric pad. I'll try it here and see if it survi; /archives//html/Towertalk/2009-11/msg00537.html (11,252 bytes)
18. Re: [TowerTalk] Open wire lines (score: 1): Author: Randy <randy@verizon.net>; Date: Mon, 30 Nov 2009 22:35:56 -0500; There's some interesting ancient information including 2,4, and 6 wire open lines (and MUCH other stuff) freely available here: http://www.lulu.com/product/download/radio-antenna-engineering/188777 "; /archives//html/Towertalk/2009-12/msg00000.html (8,460 bytes)

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