It is not only penetrating the "Wall of Buildings", those buildings also throw a "secondary" signal to the radio. We refer to it as multi-path. There is a cancellation of a portion, if not all, of the signal making dead spots. So, even if the strength of the point to point signal will be there on paper, the multi-path reduces the comfortable listening level. In some radios, it shows it's ugly head as reduced highs, mono reception with a flickering pilot, or worse, as in HD. If you have the digital delay, where it is toggling between the analogue and the digital signal, your button is pushed.
Jeff in Sa-ra-so-ta!
Jeff in Sa-ra-so-ta!