All posts by Me
Below are all of Me's postings, with the most recent are at the bottom of the page.
Thank you
Why is it that someone can receive a good signal (power and quality) from a particular transmitter for a channel, but be unable to recieve any signal from another channel from the same transmitter?
I would expect an all or nothing reception from a particular transmitter?
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I think that I am receiving some signals from Reigate because I get a strong signal (strength and quality) on Channel 24 (498.00MHz).
Regarding the explanation of relections etc. that account for some channels appearing but others no appearing (same transmitter), I doubt that this is the reason because the frequencies are too similar and, therfore, the distorting effects are likely to be equivalent.
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I have been trying some different orientations of the aerial.
I pointed it towards Whitehawk Hill (WH) and received no signals. I adjusted the angles several time, but it made no difference. I tried a couple of heights, no difference.
I repositioned the aerial back to its original location, towards Newhaven. I can pick up weak signals from WH on occasions.
I assume that these signals are caused by refelections, although I am surprised that I can occasionally get signals from WH when pointing away from this transmitter, but nothing when I point towards it.
Can anyone suggest how I might increase reception from WH (home build solutions preferrrd, such as modifying the aerial).
On a related point, is there a difference between a Yagi aerial and an Antiference aerial.
Thanks
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Sometimes I get considerable reflections, at other times none at all. Since hills etc. are constant, am I right in assuming that the differences are due to atmospherics.
If atmospherics are the correct explanation for the difference in phenomena, I have noticed that similar weather conditions produce different results (strong or no reflections).
I find it difficult to explain these phenomena. I seem to get all (meaning weak), or nothing - nothing in between. The Signal, when I can detect it, is always strong, but of poor quality.
You mention experimenting with a log periodic. Would not removing the small elements (directors) from the front of a Yagi have a similar effect, i.e., reduce the forward gain. I would have thought that this loss would have resulted in a larger gain at other positions, including the rear.
I found that removing the reflectors, although in theory should have had an effect, had no effect at all.
Best wishes, thanks for the links
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Sunday 28 April 2013 1:52PM
Is there a difference between just retuning and doing an initial tune (first time reset, factory reset.