<[EMAIL PROTECTED]> made an utterance to the qrplist gang ---------------------------------------------------------------------- > > Jeff Davis <[EMAIL PROTECTED]> made an utterance to the qrplist gang > ---------------------------------------------------------------------- > On Sep 5, 2005, at 7:24 AM, Thom R LaCosta wrote: > >> I have a very antenna compromised location....it's a row(town)house >> that's 11 feet wide, 25 feet long and a 10 foot deep yard. >> >> So...if I can get on the roof, I can play with end endfed wire...or a >> really short loop, or maybe a vertical. >> >> Is there any advantage/disadvantage of creating an rf ground by >> laying out chicken wire mesh over the roof? I'm getting ready to use >> a cold coat on the roof...and can lay down the wire, if it will help. > > I'd be tempted to try a "sorta square, horizontal loop ... if you can > get four short posts (PVC or wood) up, one on each corner, then let > those support the "sorta-square loop wire up a few feet about the roof. > > I don't think there would be any disadvantage to laying a grid of wire > mesh or just wires on the roof before coating it, but I would provide > yourself several places where you can tap into it in various > locations. > > Only other thing to keep in mind is that if you make it an effective > RF ground it will be over your head which probably means it will be > less useful at reducing stray currents inside your building - but at > QRP levels and with a balun at the feed point I'm not sure that's a > serious consideration. > > 73, > -- > Jeff, KE9V > >
Actually with all of the installations I have had a chance to measure for rf quietness (so to speak), the very best one was built below a ground plane of about 4 acres in size. Very quiet for reception. And a great place to have the transmitters too. Vy 72; Bob w9ya ---------------------------------------------------------------------- Submissions: [email protected] Unsubscribe: [EMAIL PROTECTED] - unsubscribe qrplist in body Hopelessly Lost: [EMAIL PROTECTED] - help in body of message Zerobeat Web Page: http://www.zerobeat.net - sponsored by www.tlchost.net ----------------------------------------------------------------------
