Good afternoon, Peter! Well, your comments make me even more suspicious that Ron's KLM balun has been damaged by common mode current, induced in his 10m coax by 160m tower current. Your 1/2 wave baluns, made of 1/2" Cellflex, should be much more capable of withstanding the common mode currents. A good solution and preventive measure, I think. Have a good day!
Charlie,. K4OTV -----Original Message----- From: Topband [mailto:[email protected]] On Behalf Of Peter Voelpel Sent: Wednesday, December 26, 2012 7:14 AM To: [email protected] Subject: Re: Topband: KLM antennas on shunt fed towers I feed my tower at a height of 21m against one radial and have KLM yagis mounted at 25, 31 and 44m (top of tower). So far I never had a problem by running high power on 160m and no change in SWR on the KLM antennas. However, I don´t use the original baluns but home made half wave 1:4 Baluns made from 1/2" Cellflex. 73 Peter, DJ7WW -----Original Message----- From: Topband [mailto:[email protected]] On Behalf Of Ron Spencer 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. _______________________________________________ Stew Perry Topband Distance Challenge coming on December 29th.
