I am on my third antenna and about to change brands. My unit was installed at the factory and the antenna is on the rear of the boat. While dealing with Linda is great – she is very good – the frustration with a $600 unit that only works some time can get to you. I have a 334c on the front of my boat and it always holds the signal. WayneLast edited by WIBassman on April 6th, 2009, 12:33 am, edited 1 time in total.