7
Despite the large metal bracket right beside the antenna :). It was nearly as good sitting in the house window, and the house is 10m lower.
When it was about 3.5m above the shed, I got better coverage North West, through East and around to the South West. It was just on a couple of sections of 32mm plastic conduit, and was swaying in the wind. With the storm coming, it needed to come down.
I want to try it on my comms tower. I don't want to disturb the existing services on the tower though, so I am sorting out an enclosure and a new run of ethernet cable, so I can use PoE to the Pi. I have everything I need, but the weather needs to cooperate.
The range has been less during the last few days. We have had a lot of rain, and I have been getting line of sight distances (estimated 220NM). In slightly better weather, I was definitely getting refraction over the horizon and seeing about 50NM more than I should.