My antenna is a 5btv on the roof of my garage with radials for all bands some 60 feet from my basement shack. i am using LMR 400 cable and have ferrite on all cords yet on 40 and 80 I get rf so bad I can not use my mouse or hold a wireless internet connection. HELP !!!! John NY6DX John J. Nistico 911 Electric Inc. 516.356.6071