There is a problem. I had a 4 ele 40 and 5 ele 20m klm on a loaded tower. I had a coax balun on the 40 ...... arced through the insulation where it was taped to the boom and the neighbors reported to me there was a fire on my tower. The coax was crisp. The 20m beam had a klm balun and it failed .... not so dramatic ... but it failed. I grounded the DE on both antennas at their center... made no difference to their performance that I could tell... and the problem was gone. I had to re-tune the tower because of the increased top loading. John K9DX
> Date: Tue, 25 Dec 2012 22:52:43 -0500 > From: [email protected] > To: [email protected] > Subject: Topband: KLM antennas on shunt fed towers > > Anyone have problems running a KLM antenna with the 4:! balun and > elements insulated from the boom (stock KLM config) on a shunt fed tower > for 160? I ask because I have a 6 element 10 on the top of my shunt fed > tower and now, after running a kw on 160, the antenna's swr has gone > over 2:1 where before it was pretty flat at about 1.2:1 or so. Any ideas? > > Thanks > Ron N4XD > _______________________________________________ > Stew Perry Topband Distance Challenge coming on December 29th. _______________________________________________ Stew Perry Topband Distance Challenge coming on December 29th.
