Leaderboard

Just a couple thoughts - you may have already considered these, but I'm including this for persons with TK-880 (8 pin mic) radios that may not be aware of this: Option 1: TheTK880 series has the Operator Selectable Tone set up menu available through the software 'edit' tab. Once you have the tones in place that you may need, then go to the "Key Assignments" drop down menu and assign the two arrow keys to the right of the "A" and "B" buttons to select the tones. Option 2: Go with an actual KMC 36 mic from Kenwood to solve the scan issue. Good luck...

A j-pole doesn't need a ground plane like a quarter wave does. But the coax shield from the antenna to the radio is a chassis ground. It's part of what makes the j-pole work so well. Since you plan to place this in the attic, a ground for the mast as lightning protection probably is not necessary, and you probably won't need a lightning arrestor installed inline on the coax either. In fact, for an attic install, you really don't need a mast, at least in the traditional sense. I have two j-poles from Ed Fong. They're a wire ladder designed to be installed inside thin wall PVC piping, and there is little chance of them being a lightning rod if I were to mount them on top of the house. I'd still place a lightning arrestor inline for outside use like that. My amateur radio club uses a j-pole fabbed out of 600 ohm tv antenna lead. It's not in any kind of encasement. They just fasten it to a 15' pole with some rubber bands and tie the pole to one of the legs of an outdoor shelter. The only ground there is the coax from the antenna to the radio. I would check continuity on the coax shield from the antenna to the radio just to be safe.