Might try to locate a feed though barrel connector. Can be made water tight
with silicone or you can try for a hermetically sealed unit.

If it were not for the triband requirement you could use balume coupling as
is done when on some AM stations with series fed antennas that have FM
antennas attached.

| I just bought a new RV that has an all fiberglass shell. It also has
| thermopaine windows. (2 layers of glass with an air space between them.)
|
| In my older RV I used through the glass antennas with great success, but
| with the thickness and air space of the thermopaine windows they will not
| work.
|
| I am looking for suggestions for antennas that would preferable not
require
| drilling into the shell, but if necessary the smaller hole the better.
| I my Cell company is Verizon and is a triband phone.
|
| My VHF needs are for 144-148
| and UHF 420-450
|
| Thanks
| 73
| Dunc, KL7RH
|
|
|