So…initial testing shows much poorer results than I was hoping for.
While the GMRS repeater running 8 watts with a 7dbi gain antenna has full coverage of the entire immediate area and being reachable 30 miles away.
The 1watt goTenna mesh is attached via 12m of LMR-400 (appox .3watt loss) to a 6dbi antenna mounted just below the GMRS repeater antenna. Looks like I’m putting out approximately 1.7watts ERP at the antenna.
My units failed to communicate with a gotenna approximately 3 miles away but with a slight hill in the way even though I am higher up. I am able to reach a gotenna at a higher altitude a little bit farther out.
I also lost contact with another gotenna that was driving around the base of the hill where the node is located.
This seems to indicate that the 900mhz is severely less tollerant of terrain than 460mhz.