[Antennas] More: Elevated Cushcraft R-7

[Ron W7MRR]

Hi Dennis:

   Cushcraft recommended mounting this antenna 10 feet off the ground.  Don't ask me why.  

   I have a R-7 mounted on a pipe on top of my house with the base around 25 feet off the ground.  Comparing it [on 40 meters] to an inverted vee for 40 meters that I have at a comprable height, it is 1.5 "S" units down from the inverted vee.  On the higher frequencies, it comes closer, but still down from a full size dipole.  It is a substandard design unless all you can put up for all band use must reside within a space that is 20 feet tall and no more than 6 feet across.

   Sorry to all of you out there that may have WAS, WAC or worked 187 countries with this antenna.  Your bedsprings probably would have done the trick many months sooner.

Ron W7MRR




 --- On Tue 05/17, Dennis L. Wade < DWADE at pacbell.net > wrote:
From: Dennis L. Wade [mailto: DWADE at pacbell.net]
To: antennas at mailman.qth.net
Date: Tue, 17 May 2005 11:58:53 -0500
Subject: [Antennas] More:  Elevated Cushcraft R-7

Thanks to all for their thoughts. I've had a few more.<br><br>The whole reason I had this idea was because of its <br>independence from a <br>ground radial system, so I thought "higher = better". <br>Many have agreed.<br><br>So...the plan. I have in mind to erect a 50 ft mast on <br>the roof to <br>support one end of a 80m loop, as well as various <br>VHF/UHF antennas at or <br>near the top. I know Cushcraft wants clearances <br>between any object and <br>the R7, and suggests non-metallic guys for a mast. I <br>don't think rope <br>guys would be a problem in this case, and I'm thinking <br>if the nearest <br>antenna is 10ft or more from the R7, I'd be OK.<br><br>Comments?<br><br>Dennis<br><br>---------------<br>Dennis Wade<br>KG6ZI<br>Carmichael, CA<br><br>______________________________________________________________<br>Antennas mailing list<br>Home: http://mailman.qth.net/mailman/listinfo/antennas<br>Help: http://mailman.qth.net/mmfaq.html<br>Post: 
mailto:Antennas at mailman.qth.net<br>

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