Rick 386 wrote:Dave,
Maybe YANCHE can add some input..........
I would try to map the straight line path from your antenna to the various TV station transmitting towers. Perhaps it's obvious but you need to decide if the wind turbine blades are obstructing the signals or reflecting them. If it a reflection, you get multi-path signal reception which depending on the phase of the signals your antenna receives it will add or subtract signal. If the signal is being reflected off the rotating blades it will be a very complex signal. Any solution will likely require a new directional antenna with a narrow reception direction and a significant rejection characteristic for rear or side lobe reception. I suggest a detailed understanding of the map geometry before buying anything. There are instruments that can qualify the signal you have, but they are costly and typically only used by professionals. In addition there are fairly accurate computer simulation programs that predict signal strengths. These are what are used by antenna engineers when, for example, they are designing a new cell tower site and want to know the coverage. The simulations are surprisingly good. So much so the field surveys are seldom done these days.