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Strange OTA problem
Posted 19 February 2008 - 05:27 PM
Yesterday I mounted the antenna outside about 14ft higher than it was. It is pointed at 292 degrees, the same as before. The problem is the NBC channel signal is very inconsistent, from 100% to no signal and we get the 771 searching for signal message every couple of minutes. All the other channels the signal strength is improved and the OPB signal is twice what it was.
I've tried rotating the antenna but if anything the signal gets worse on NBC. I'm at a loss as to why moving the antenna outside and elevating it should make one channel signal worse. There are trees nearby but the antenna is positioned such that they shouldn't effect it.
Any idea what I might try to correct the problem.
The antenna has an amplifier on it which came with it from Radio Shack and we are about 7.5 miles from the transmitter.
Posted 19 February 2008 - 05:52 PM
Posted 19 February 2008 - 08:04 PM
This could be a case where the signal is actually too strong. Not sure if that antenna will operate at all without its amplifier. You can get "RF Attenuators" at Radio Shack that will let you reduce the signal level.
Excellent I would never have thought you could have too strong a signal.
I simply unplugged the amplifier and channel 8 was back on OK. It doesn't seem to have adversely effected the signal strength on the other channels either.
Posted 19 February 2008 - 08:24 PM
Posted 19 February 2008 - 09:17 PM
I have tried to add an amplifier to help improve signals on some weak channels, but I always lose NBC Channel 2 which is the strongest without the amplifier.
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Posted 19 February 2008 - 10:04 PM
Nothing beats an excellent VHF/UHF antenna design.