https://www.youtube.com/watch?v=f1BgzIZRfT8
I have watched a bunch of tower climbing and antenna repair video's before. I wonder how much they turn down the transmitters when those guys are climbing on the antennas ? Quite a bit I would imagine.
Larry
The large broadcast radio towers, including TV are out of service while climbing. Many of these, the structure is the antenna.
Two way, such as Police and Fire radios, cell systems and microwave antennas are attached to a supporting tower. These towers are grounded. Small two way systems, under 100 watts require shutdown only if the climber will pass with in 3 feet. Two way systems over 100 watts are either turned down or out of service while climbing.
Microwave is save from behind the dish. The link must be out of service if anyone or any thing will pass in front of the dish.
Are those the antenna sections that he end up standing on at the top while he changes the light? Would they be 'directional' if so?
Quote from: Westbranch on April 22, 2018, 01:25:54 PM
Are those the antenna sections that he end up standing on at the top while he changes the light? Would they be 'directional' if so?
Commercial antennas are designed to have specific radiation patterns for the coverage area they want to get. So for example rather than having a vertical with even distribution all the way around - they may design the antenna to have some lobes which will reach a city at the expense of some other area .
Larry
Yes, the butterflies are the antenna active/reflector elements. The configuration shown would be very near Omni directional.
I don't work on broadcast towers. The highest tower I have worked on is 260 foot structure on top of a mountain. That is around 17 floors. The view is always great from up there. Towers seem to be getting higher, or at 60 years old, they just take longer to climb.