Home |
Search |
Today's Posts |
#7
|
|||
|
|||
Floyd Davidson wrote:
"This thing (TV microwave relay station) was located 50 miles from town at 8500 foot up on a mountain top. They had a 50 foot tower (at the TV studios I suppose)----they turned it on and it worked great." So, if it wasn`t broke, why did they fix it? Floyd also wrote: "But somebody had the smart idea to see what happens if they slide the dish down the tower to see if the signal would improve. It did!." I wasn`t there, so I can only speculate, but I might have not been surprised by those results. On a 50-mile path with plenty of mid-path clearance, propagation is similar to communications with a satellite. One difference at the Arizona latitude is the vertical angle the dish path makes with the Earth. The low angle the dish on the terrestrial path makes with the Earth, makes it vulnerable to reflections from the Earth. The higher the dish is placed, the more vulnerable it becomes. That`s a reason to go high / low on a reflective path, and not high/high. (Low/low won`t make the trip on most long paths due to Earth curvature). Best regards, Richard Harrison, KB5WZI |
Thread Tools | Search this Thread |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Forum | |||
Flagpole antennas | Antenna |