I owned a SEA 222 for years, plus the tuner. My antenna was a simple end fed wire that ran from the stern of the boat up to the ...almost...top of mizzen.
My 222 pushed out 150W of power, not sure where you get 100W from ??
Admittedly my ground was a
steel hull, but I could throw out a signal halfway around the world without a problem.
Many areas where a problem could arise.
1. The connection between radio and tuner, remember the tuner also needs 12v power to operate.
2. From the tuner....next problem area is the thru'
deck connection. I ideally, the tuner should be near as damnit to the
deck. I used an insulated fitting here, and used GTO-15 wire from tuner to insulator. in my case, about 4".
2. From thru' deck insulator, another run of GTO-15 cable up the inside to a pvc pole. pole is about 6' long, necessary to keep anyone from touching the antenna while transmitting.
3. Antenna was a length of plastic covered 1/8" inch s/s cable fitted with insulators each end. The upper insulator was attached to top of mizzen with
oil soaked twine, about 18" between insulator and top of mast. The lower end was similar and attached to the pvc pole, also with about 18" soaked twine. The GTO cable was attached to the wire with a copper clamp and wrapped with
electrical tape.
That's it. Simple enuff.
In later years, I used an identical system on a
fiberglass boat, but ground was two 18" copper grounding plates. This setup worked as well as the first.
Following that, I got into Ham radio, and used the same setup, which also worked like a champ.
Somewhere along the line, you've done something wrong. Hard to say without being there.
Here's my
advice. Most every town has a Ham club. Contact them and you'll find the members most helpful and willing to come out to your boat for a looksee.
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