That W8AMZ sloper is a "condensed version" of this antenna: http://www.iw5edi.com/ham-radio/?a-160-meter-antenna-for-small-lot,105 W8AMZ's loading coil (that black thingy between the SO-239 and the 68' feet of black wire) is sort of how I constructed my "160 meter antenna for a small lot." I wound the 70' vertical coil into a condensed 4.5 feet of coil at the top of the 8' PVC.....used about five or six 50' to 70' radials lying on top of the ground....had 180+ QSOs in the 2010 and 2011 CQ 160 contests as a QRP entry including JAs and KHs Best of luck, Mike....I have a Power Point wiring schema for my antenna if interested....72, Jim Rodenkirch K9JWV
> From: ma...@ka5m.net > To: ve...@nbnet.nb.ca; topband@contesting.com > Date: Sat, 28 Mar 2015 15:58:21 -0500 > Subject: Re: Topband: ZS6BKW > > Mike, > > I found a website with detailed info on the ZS6BKW antenna. > > http://www.nc4fb.org/wordpress/zs6bkw-multi-band-antenna/ > > To use the antenna on 80M and above the 39.1 ft of ladderline should drop > down as vertically as possible, and then connect to 50 ohm coax through a > "1:1 current balun" (common mode choke). If you connect the station end of > the coax shield to center conductor and feed it against a radial system the > coax will be part of the "vertical element" of what has become a 160M top > loaded vertical fed against a radial system. How will the coax in your > installation run from the station to the base of the ladderline? > > Or, if you have a 40 - 45 ft high support (tree) you might consider a W8AMZ > 160M Reduced 1/2 Sloper. > > http://w8amz.com/W8AMZ_SLOPERS_Page.html > > If you do try the ZS6BKW antenna reconfigured as a top loaded vertical on > 160M by connecting the station end of the coax shield to center conductor > fed against a radial system, I'd like to know how it works for you. > > 73, > Marsh, KA5M > > > > -----Original Message----- > From: Topband [mailto:topband-boun...@contesting.com] On Behalf Of Mike > Smith VE9AA > Sent: Saturday, March 28, 2015 1:44 PM > To: topband@contesting.com > Subject: Topband: ZS6BKW > > Thanks very much Marsh. Obviously you have some serious antenna modeling > skills and I do thank you for that second analysis. > > If I may indulge you for one last request (tweak) pse? > > If you could keep everything the same, but instead, leave the ladder line as > is and short the 50' of coax at the shack end (and add a normal 10' jumper > to the radio if it makes a difference?) would that make the #'s much > different? > > Ground radials attached to the real 10' jumper /shorted coax interface, > right at the window. I think in actuality I am going to buy LM240 (is that > that right moniker for a RG8/x mini equivalent?) so I can sneak it out a > window, etc. > > and if I was able to make the switch-over in the shack (or right at the > window-ledge) then that would be the way I go. > > Thanks for the extra work. Hope we manage a QSO ! > > Mike VE9AA & ??#??? this summer. > > p.s.-can't wait for snowmelt as I can start building and testing ! > > Mike, Coreen & Corey > > Keswick Ridge, NB > > _________________ > Topband Reflector Archives - http://www.contesting.com/_topband > > _________________ > Topband Reflector Archives - http://www.contesting.com/_topband _________________ Topband Reflector Archives - http://www.contesting.com/_topband