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1. Topband: experimenting with inverted L (score: 1): Author: james soto <kp2bh@yahoo.com>; Date: Wed, 30 Nov 2011 12:28:15 -0800 (PST); Hello friends,I am experimenting with an inverted L for 160. the antenna is about 132 ft long with about 45 to 50 ft vertical and the rest horizontal.i have about 4 radials connected direct to the an; /archives//html/Topband/2011-11/msg00299.html (7,652 bytes)
2. Re: Topband: experimenting with inverted L (score: 1): Author: DAVID CUTHBERT <telegrapher9@gmail.com>; Date: Wed, 30 Nov 2011 13:48:45 -0700; The radiation resistance of your antenna is 12 ohms. The 1.5:1 VSWR tells us the base resistance is either 33 or 75 ohms. The ground loss resistance is either 21 or 63 ohms. The radiation efficiency; /archives//html/Topband/2011-11/msg00300.html (8,088 bytes)
3. Re: Topband: experimenting with inverted L (score: 1): Author: "Joshua M. Arritt" <jarritt@vt.edu>; Date: Wed, 30 Nov 2011 17:17:34 -0500; If there's no change in VSWR when disconnecting the ground system, that would make me terribly suspicious of the feedline if Eu was my unobtained goal after some time on Topband. 73, - Josh / KF4YLM; /archives//html/Topband/2011-11/msg00302.html (9,344 bytes)
4. Re: Topband: experimenting with inverted L (score: 1): Author: Herb Schoenbohm <herbs@vitelcom.net>; Date: Wed, 30 Nov 2011 18:45:01 -0400; Jimmy, Think of it this way...if the feed point resistance of your antenna is 12ohms, "a low VSWR across the band", and fed with a 50 ohm transmission line, you have the equivalent of putting a 40 oh; /archives//html/Topband/2011-11/msg00303.html (9,214 bytes)
5. Re: Topband: experimenting with inverted L (score: 1): Author: Guy Olinger K2AV <olinger@bellsouth.net>; Date: Wed, 30 Nov 2011 23:56:19 -0500; Carrying this line of thought to the business end of things, 12 ohms / 75 ohms = 16% of the voltage from your transmitted signal will be across the antenna and 84% of the voltage being dissipated in; /archives//html/Topband/2011-11/msg00304.html (10,687 bytes)
6. Re: Topband: experimenting with inverted L (score: 1): Author: k6xt <k6xt@k6xt.com>; Date: Thu, 01 Dec 2011 10:25:44 -0700; It most likely also means whatever Jimmy is connecting the radials to is probably not the actual antenna. This result just cannot be, if the radial system were connected to the radiating element. 73; /archives//html/Topband/2011-12/msg00005.html (7,459 bytes)

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