Hi Mike,
I appreciate your comments. I need to discuss this further with you – After SS CW. I’ll be in touch next week. TNX, Bill N3RR From: Mike Waters [mailto:[email protected]] Sent: Friday, November 06, 2015 5:21 PM To: Bill Hider Cc: topband Subject: Re: Topband: beverage layout Hi Bill, I see you have a wide vertical spacing (http://users.erols.com/n3rr/photos/dual_ew-1.jpg). I don't doubt that they work well, as you say. I did a fair amount of analysis about that design in the past. I forget the finer details, and I'm not in the mood for any more math and modeling today, but I want to throw out an idea. That design might work slightly better if the spacing wasn't as large, or if the wires were side-by-side. The way it is, the ground underneath it unbalances it somewhat. The Z of the upper wire to ground vs. the Z of the lower wire to ground is unequal. Exactly how much difference in F/B in the reverse direction that makes, I don't remember. But in some situations, changing the spacing or turning the wires 90 degrees might make the difference pulling a weak one out of the noise and QRM. Not picking on you. Just food for thought. :-) 73, Mike www.w0btu.com On Fri, Nov 6, 2015 at 1:07 PM, Bill Hider <[email protected]> wrote: My Website has detail ... on my two 275' Beverages (E & W) mounted on a single set of posts. ... I've been using all these since 2000. ... Scroll down to the System Design links & click on "Beverages". Here: http://users.erols.com/n3rr/ No virus found in this message. Checked by AVG - www.avg.com Version: 2016.0.7227 / Virus Database: 4457/10956 - Release Date: 11/06/15 _________________ Topband Reflector Archives - http://www.contesting.com/_topband
