Author: Bill Straw via TowerTalk <towertalk@contesting.com>
Date: Tue, 8 Aug 2017 17:08:29 +0000 (UTC)
The sunspots are gone and I need a better 160M transmit antenna. My previous Cushcraft MA160V over 50 X 50' radials worked OK for my expectations, but it had a very narrow bandwidth and the top loadi
First, you've left off the reference for gain, which is probably "i." Antenna gain is usually expressed as dBi, which means dB with respect to an isotropic radiator in free space. Several years ago,
Author: David Gallatin via TowerTalk <towertalk@contesting.com>
Date: Tue, 8 Aug 2017 18:40:34 +0000 (UTC)
Did he just state db? not dbd (gain over a dipole) or dbi (gain over the theoretical isotropic radiator.) ? With that bit of info you don't knowexactly where you stand. 73, David, AA9G From: Bill
Author: Herbert Schoenbohm <herbert.schoenbohm@gmail.com>
Date: Tue, 8 Aug 2017 15:06:40 -0400
The -2.2 db figure will change quickly every time you double the number of radials even if they are only 50 footers. A better approach would be to start out with putting down some expanded cooper mes
I strongly encourage you to read Rudy Severns' great work on radials and top loading. antennasbyn6lf.com Capacity hat top loading is well proven to beat most (all?) other short vertical antenna desig
I second this. Great stuff, meticulously measured and presented. He and the late Cebik are great resources. Frankly, I'm amazed at how prolific they are. Wes N7WS ____________________________________
Yes, Rudy's work is really great. He observes something he's measured, explores it with extensive modeling, then measures again to confirm modeling, then more modeling. I've included summaries of his