RG-62/AU, 28". I made my own with cable from "The Wireman" (thewireman.com) and RCA plugs from Radio Shack. They work fine. Harry, KT4AE Maryville, Tennessee Jim Liles wrote: > Hi Dave: > The coax that is used to connect the SX-117 and HT-44 must be a specific > type and length.