According to Peter Waters (G3OJV), many of these location problems can be solved by "linear loading" your HF antennas.
Peter discusses linear loading and shows how you can modify your HF antennas without losing performance.
If you can't see the video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=OSxg7XQFwIE
Here are some comments from Peter (G3OJV):
Thanks for joining us today.
Aloha es 73 de Russ (KH6JRM).