Bill - there's not one answer to your coax question. I suggest you obtain one of the Wireman catalogs and read it through completely. They explain the various types of coax and which to use for which application. One thing for sure - if you don't buy your coax from Wireman, look it over VERY closely for voids and/or lumps in the outer jacket. I made the mistake of buying RG-213 type coax from another large vendor and there were voids in the jacket large enough to allow you to see the shield inside when the coax was flexed. I sent the coax back to them, with the bad places market with yellow tape, and they said there was nothing at all wrong with the coax. The coax I've purchased from Wireman has always been of the highest quality and their customer service is excellent.
73, Floyd - K8AC
West Jefferson (Ashe County), North Carolina