Topband: KLM antennas on shunt fed towers

[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