Ok, any time that I drive through the city of Ann Arbor Michigan I always loose my sat signal and the repeater signal also. Both show on the meter level bar that the signals are bouncing up and down from %0 to %100. I would agrea that tall buildings in the way of the birds path would be a problem and I would agrea that an npr station based in town is also another potential issue thats interfering with the repeater but the issue is present even when out in the open with no nearby buildings. I have also driven through downtown Detroit, Atlanta and 4 days a week Im in downtown Athens and dont experiance this issue, any idea's as to what could disrupt the signal from the sat aside from physical obstructions?