/diy/ - Do It Yourself

Any of Yall know their way around hardware and specifically cabling?

I'm looking at installing a cellular repeater in a remote site behind a hill or two. I haven't measured it yet, but I'm looking at probably close to 400ft of cabling length to run out the top of the house, up the side of the hill and then up a 40ft tower on top. I'm looking at 7/8 heliax hard line which should get me a cable loss of around 6.8db at 1900mhz
The thing is, the kit comes with about 100ft of lmr400. It will work fine with the heliax right? I just put on N type ends and connect it up like normal? Or am I completely retarded?
Otherwise to clear the hill, I need about a 100ft tower.