In my experience it's not the houses or trees that block you. It's always changes in ground elevation, a small rise here or there. Using 902-928 MHz (actually a

In my experience it's not the houses or trees that block you. It's always changes in ground elevation, a small rise here or there. Using 902-928 MHz (actually a 5 Mhz channel centered around 906) did not increase my range versus 2.4 or 5 GHz options at the same height above terrain. And the fresnel zone of 900 MHz is much larger than 5 GHz so in it requires more height above terrain than 5 GHz. Not great. Tropospheric ducting is so transient and rare it does not matter for this application. And it doesn't really help getting your signal across town. I regret investing in a bunch of 900 MHz transceivers, bidirectional amps, filters, etc.