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Hi glebo - Yep, a challenging problem - getting "out" from a jungle location, especially at low takeoff angles. That close-in wet stuff absorbs a lot of energy. The antenna you can get going is mostly limited by the amount of time and energy you have available!
On insulated wire - I think it doesn't matter with antennas. Yep, skin effect keeps most of the current flow on the outside surface of the wire conductor but "insulation" is essentially transparent to radio waves (think plastic radomes, fiberglass vehicle whips etc.) . But it does keep wet leaves off the conductor - which helps with immediate power loss and random detuning. Insulation has a slight effect on the length calculation, however I think that can be ignored for practical purposes.
Yep - you're right: The best antenna is the one that works! No BS GI !! LOL
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