All posts by A Farlow
Below are all of A Farlow's postings, with the most recent are at the bottom of the page.
"It is unlikely that the problem will continue for more than a few hours at the most,"
Every day? Every other day? Certainly every week but at present it's pretty constant. Not good enough.
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Mike P:
Crystal Palace is my nearest transmitter (18kilometres away; aerial group AH.TH) and according to my equipment the quality of the signal is good but the strength of the signal usually hovers around 47%. Previously the quality has been over 80%. I have had the same aerial since pre-Freeview/digital and never had problems before.
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Sorry, meant to say the strength of the signal hovered around 80% previously. Quality has always been good.
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I am now pretty certain that all of my problems are related to the heatwave and nothing to do with my aerial.
Possible causes of interference - at800
"High pressure, which brings fine weather, allows signals to reach areas they wouldn't normally reach. Under normal circumstances, the signals from each television transmitter can only be received by those homes that have aerials with a direct line-of-sight to the transmitter. However on warm summer days, hot air can get trapped under colder air high up creating a layer which acts like a mirror for television signals, reflecting them back towards Earth. This can cause signals from different transmitters to overlap. Unfortunately, there is no solution to this kind of interference. Broadcasters can't prevent it, and adjusting your aerial will make no difference. Reception will only improve when the weather changes."
Tsk! Men on the moon forty years ago and still .....
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What is really odd is that when the commercials are shown reception is at least better if not perfect!!!!!
It's a mystery ...
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Miraculously, the problems disappeared on 21st July. I didn't do physics, so can only assume there was a drastic change in atmospheric pressure.
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All problems miraculously resolved on Saturday 21st. Presumably some drastic changes in atmospheric pressure!
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I have no idea what this means technically, but do know that when the weather is unusual I cannot get commercial channels and I am in north London. Infuriating.
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Thursday 12 July 2018 8:21PM
London reception on all commercial channels is appalling. Picture breaks up or freezes. No recording possible, of course, and re-tuning makes no difference at all.