Until the RF Ground is described, You can't make any definitive
decisions, about any kind of Marconi Antenna, no matter how it is feed.
This is common problem with many, less than educated, Hams, that try and
design Antennas Systems for HF. Most of the Losses in these designs are
in the RF Ground System, and not in the Radiators. Just Say'en....
YMMV...

I am not interested in knowing the overall losses and making decisions on my
antenna . I am just interested to know whether someone has experience on the
effect of very high voltage on the antenna terminal. And for that very purpose
the ground system is not relevant.

No useful answer received so far.

The problem of this newsgroup is that people not knowing how to answer a
specific question, reply to other questions, just to write something.

73

Tony I0JX
Rome, Italy