May I suggest having a look on the rsgb emc web pages.  They are linked
from the site

rsgb.org.uk


At 20:59 20/11/01 -0000, you wrote:

This is not probably much DX related and I really
apologise for that.

I just find out today that in freq. below 28 Mhz (when using highpower <above 100 watt>) I make

a terrible telephone line interference in my neighbours
telephones, they can't hear a thing only my voice in the
phone.
I would really apreciate your help and advice concerning
this problem, mostly if you already had a similar situation
and what you made to solve it.

Looking for a reply.
73


Jose  CT1EEB