lu6etj wrote:
Do you think that static precipitation it is a valid explanation in
these conditions?


No. It makes no difference at all.

If you have a static build-up problem all you need do is install a leak
resistance or a suitable RF choke to ground. One should have that in an
antenna anyway.

I have the choice of any antenna I want and unlimited space to install
them. I often have several antenna types up for any one band at the
very same time. I've had a coaxial dipole up along with another dipole
the same height, and there is no noticeable difference in any aspect of
performance. I've even removed the shorted wire connection (the center
conductor connection past the feedpoint) and restored it, and the
antenna performance remains virtually identical in both noise and
bandwidth.

73 Tom