Tnx Dave, That would be very helpful. 73, N2TK, Tony -----Original Message----- From: topband-boun...@contesting.com [mailto:topband-boun...@contesting.com] On Behalf Of DAVID CUTHBERT Sent: Friday, August 10, 2012 12:20 PM To: Herb Schoenbohm Cc: N2TK, Tony; topband Subject: Re: Topband: Radials over a stone wall
I can run a NEC simulation tomorrow to see how much radials up and over affect things. Dave WX7G On Aug 10, 2012 10:16 AM, "Herb Schoenbohm" <he...@vitelcom.net> wrote: > On 8/10/2012 11:17 AM, N2TK, Tony wrote: > > I shunt feed my tower for topband. I use variable vacuum caps and a > vacuum > > relay at the base to switch between the low end and the high end of > > the band. It seems to work okay. I have 100' buried radials spaced > > 10' at the ends from o degrees going clockwise through about 220 > > degrees. I have a > 4' > > high stone wall that runs about 20/200 degrees that is about 35' at > > its closest point to the tower. So the radials are progressively > > shorter on > the > > West side of the tower. > > > > > > > > I am making an assumption that going up over the wall will distort > > any benefits of extending the radials on the West side? Is that a > > true assumption. > > > > I can't really have the radials go from the tower base up at an > > angle to clear the stone wall and continue on. If I am to extend > > them the radials would have to go on the ground to the wall then up > > and over and back > down to > > the ground. > > > > > > > > > Tony, A long masonry drill used in the cable TV industry (which has a > hole on the pointed end to attach the wire and pull it through the > wall, is your best option in my view. > > Herb Schoenbohm, KV4FZ > _______________________________________________ > UR RST IS ... ... ..9 QSB QSB - hw? BK > _______________________________________________ UR RST IS ... ... ..9 QSB QSB - hw? BK _______________________________________________ UR RST IS ... ... ..9 QSB QSB - hw? BK