"Thierry" - wrote in message ...
Hi,

Well, I receive some answers, found others on the Internet, all is now
written in my 3 pages (see ref below).

The big pictu
There is surely no influence of HV power lines at 300m away. And probably no
QRM on HF bands at that distance either.
snip

Thierry:

Our rule is that any power line which is line-of-sight from the antenna is capable of causing interference on HF. See:

http://www.arrl.org/tis/info/HTML/power_line_handbook/

for more information.

--
Crazy George
Remove N O and S P A M imbedded in return address