Tim- I use a SEC 1223 with my K2-100 - it's about 6" away and no interference, hash, ever heard. Highly recommend - when I got it from AES to use in British Virgin Islands on a sailing dxpedition (VP2V/K4TM), AES told me we've never had one returned! 73, Cary K2-100 #5266 "I love my K2"