2020-12-05, 22:11:30
A very good post John. The timing of your post happened to coincide with some material I have been reading with regards to the arrival and departure angles of most DX signals.
The vast majority of DX signals arrive between 3 and 8 degrees off the horizon. Manufacturers do not tell you this. They tell you MAXIMUM antenna gain, regardless of where the signal is going. If you look at the specs on some Yagis that claim substantial gains, the specs might be at 16º which might be good for one-hop transmissions (4000km). However, there might only be a 1db gain at 5º
Doug, I have several antennas in my back yard but three of them go to a remote antenna switch at the base of my tower. From the antenna switch its one run of coax into the shack. There is a bias-t in my shack that sends 12 vdc down the coax for switching the antennas. In my shack is a small box that will allow me to select up to 4 antennas. If you are interested, here's a link:
https://www.radioworld.ca/ame-rcs4
Do you use a separate tuner with your 7300?
73 Rob
The vast majority of DX signals arrive between 3 and 8 degrees off the horizon. Manufacturers do not tell you this. They tell you MAXIMUM antenna gain, regardless of where the signal is going. If you look at the specs on some Yagis that claim substantial gains, the specs might be at 16º which might be good for one-hop transmissions (4000km). However, there might only be a 1db gain at 5º
Doug, I have several antennas in my back yard but three of them go to a remote antenna switch at the base of my tower. From the antenna switch its one run of coax into the shack. There is a bias-t in my shack that sends 12 vdc down the coax for switching the antennas. In my shack is a small box that will allow me to select up to 4 antennas. If you are interested, here's a link:
https://www.radioworld.ca/ame-rcs4
Do you use a separate tuner with your 7300?
73 Rob