Yes mostly, but these rivers/Lakes are close to towns. Here in my region there are also quite a few heigh tening lines and cell towers. Not to mention that, close to lakes, there are usually a bit of air traffic. Could those be interfering?
Yes mostly, but these rivers/Lakes are close to towns. Here in my region there are also quite a few heigh tening lines and cell towers. Not to mention that, close to lakes, there are usually a bit of air traffic. Could those be interfering?