I installed the KAT3 Internal ATU in my K3 during the blizzard of 2009. I now have the KANT3 Antenna Input Module that I no longer need. If anyone needs one, I'll ship it to you - CONUS ONLY - at no charge to you. 73 & Merry Christmas, "H" Cary, K4TM LYNCHBURG, VA K3-100 #3491, K2-100 #4991