I raised the yagi up and down the entire section of the mast between the building and the omni antenna, and surprisingly that spot had the best reception for the signal I wanted to receive, so I put it there. It is hard to judge scale from the picture, but the yagi is about 2ft, above the building, the base of the omni about 18" above the yagi, that yagi is 74" long if that helps any.
I didn't want to install the omni any higher as the base of it was as high as I could reach, any higher than this would of required me getting on the taller section of the building. I'm terrified of heights, it took a lot of will power just do this install. I tried a couple of different pair of shoes, and each of them are just at the point of slipping anywhere you step on this roof. Also this particular site is at a good elevation, at least to the surrounding area, so just having the antenna at this location provides good reception, here is a height above terrain calculation I did from the FCC,
0° 50.0 m
45° 27.4 m
90° 53.0 m
135° 76.7 m
180° 84.0 m
225° 59.0 m
270° 85.5 m
315° 46.4 m
As far as the ground radials from the Omni antenna, I forgot about that until I read over this post again last night, next time I'm up on the roof I'll change that.
As far as the coax, again hard to see from the picture but I affixed the coax to the #6 copper ground wire that attaches to the mast, and all strain is being taken up by the ground wire, there is no strain on any connector. The coax enters the building under the ridge cap, and I have a piece of hard rubber between the building and the coax to protect it.
I didn't want to install the omni any higher as the base of it was as high as I could reach, any higher than this would of required me getting on the taller section of the building. I'm terrified of heights, it took a lot of will power just do this install. I tried a couple of different pair of shoes, and each of them are just at the point of slipping anywhere you step on this roof. Also this particular site is at a good elevation, at least to the surrounding area, so just having the antenna at this location provides good reception, here is a height above terrain calculation I did from the FCC,
0° 50.0 m
45° 27.4 m
90° 53.0 m
135° 76.7 m
180° 84.0 m
225° 59.0 m
270° 85.5 m
315° 46.4 m
As far as the ground radials from the Omni antenna, I forgot about that until I read over this post again last night, next time I'm up on the roof I'll change that.
As far as the coax, again hard to see from the picture but I affixed the coax to the #6 copper ground wire that attaches to the mast, and all strain is being taken up by the ground wire, there is no strain on any connector. The coax enters the building under the ridge cap, and I have a piece of hard rubber between the building and the coax to protect it.
