I belong to a large club in Michigan with approx. 200 members. I have been flying at our present field for 5 years and the club has been there long before I became a member. Beyond one end of our field there are high voltage power line and towers that run perpendicular to the field. These line are close enough that some guys have actually hit them and many times guys have flown over and under them. We have many members flying planes worth as much as $7000.00. The lines have not interfered with our signals.