Join Date: Aug 2006
Location: Arlington, VA
Thanked 14 Times in 12 Posts
Rep Power: 15
You don't need insulators and you don't need a ground plate.
On most boats, you can rig an "alternate backstay", hoisted with a spare (rope) halyard and tied off -- again with a short length of rope -- to the pushpit on one side of the boat. The best material to use is insulated stainless steel lifeline. Put a loop in each end, using Nicopress sleeves or s/s clamps.
Run a length of highly insulated wire like GTO-15 from the tuner, located belowdecks as close to the base of the "alternate backstay" as you can get it, to the bottom of the "alternate backstay". Make sure the connection is good and tight.
You will need an RF ground. The easiest is to run a wide copper strap from the tuner ground lug to the nearest bronze thru-hull.
Bingo! That's it. You've got a passably good setup for HF/SSB communications.
For VHF and UHF, you'd need a separate dedicated antenna.