Yes I do American tower.com and their is an other one but I forget the name.You got any links or proof that stations have been working on tower, etc, replacements? Especially since they mostly don't know, STILL, what frequency they may be on in the future? And that key piece of data drives tower and equipment decisions?
Wrong!Well you guys are haf right but azz far azz the tower's go most of them are pretty much all set.
Wrong!Broadcasting and repacking and all the rest have been going On for quite some time.
Because they are in a hurry? What must happen is well understood and the physics of radio transmission hasn't changed since it was first used in 1900 so there aren't any excuses for not understanding what is required.Why do you think the Fcc is only going to give a short time for the Broadcasting industry a Time limit,?
Once again, please cite your source for this. Or are you of the school that if you say something loudly and often enough, it becomes true in spite of any evidence?Well Navychop you are OVER looking the big picture CBS ABC the big guys
Are all set with their repacking they lead the way for the rest.
Wrong!
Significant changes in frequency typically demand a change in altitude on the tower. If that height isn't available, a different tower must be found or built.Wrong!
The last time there was a repack was in June 2009 when they lopped off channels 52-69. The first repack was in 1983 when channels 70-81 were whacked to make room for the first cellular phones in the 800MHz range.Because they are in a hurry? What must happen is well understood and the physics of radio transmission hasn't changed since it was first used in 1900 so there aren't any excuses for not understanding what is required.
Once again, please cite your source for this. Or are you of the school that if you say something loudly and often enough, it becomes true in spite of any evidence?
I am a practicing electrical engineer and have also been a ham since 1963. Do you have any concept what an SWR of 2:1 has on a 1 MW output signal? Or how difficult it is to get SWR down at these power levels? Do you think the station engineer wants to have half of his output power reflected back into the transmitter, significantly lowering the radiated signal and at the same time having to somehow dissipate 500kW back into the station? That's what is going to happen (best case) for a station that must move from channel 40 to channel 30. The solution is to re-configure the antenna to be tuned to the new frequency. Simpler if the antenna is a simple vertical with a 360 degree radiated pattern, but most broadcast antennas have directed nodes. Now, not only the lengths of the active and passive elements must be adjusted, but the spacing must be adjusted as well. This may mean re-engineering supports for the passive elements or in worst case, moving a tower containing the passive radiators. This isn't something that can be done ahead of time while continuing to broadcast on the old frequency.
The station faces a difficult choice. When the frequency swap occurs, it may need to go off the air for some time in order make the conversion, or it can build a new antenna and swap over quickly. Again, this isn't like plugging an antenna into the back of your TV or ham set. It will take days to weeks, depending.
The broadcaster's know where they've been assigned. That information was to go out back in February in a form letter according to Trip in posts 386 and 431. Whether they think they can weasel a different frequency after everyone has submitted their permits is the wildcard.Especially since they mostly don't know, STILL, what frequency they may be on in the future?
There is nothing funny, strange, alien or unusual about the physics of radio wave propagation. It is:Funney on how it all works,and the strangest thing can happen!
Wrong again!The permits are all passed. Out and dun!!I
You're assuming that there isn't already another antenna there. I'll bet that very few broadcast TV towers have just one antenna on them.Yes you can Harsh by moving the antenna up or down in height!!!