All posts by Chris.SE
Below are all of Chris.SE's postings, with the most recent are at the bottom of the page.
Debbie:
As listed towards the top of this page, Channel4+1 is available at Freeview LCN15, Freesat 121 & Sky 204
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Stephen Connelly:
The BBC predictor says you are unlikely to get a reliable FM or DAB service !
You do know you can get the BBC Radio services on Freeview in the range LCNs 700-735.
The main services are on 700-710. Which channel above 710 is used for your local radio service is dependent on which services are available in your area.
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nick :
Hi nick. I'm afraid that's the case with many (esp. main) transmitters. The COM muxes are often at a lower power than the PSBs on a lot, but not all, transmitters. This has always been the case and is because all the UHF channels are shared somewhere and this is to reduce the chances of any interference between them in normal circumstances. On the south coast they are often more directional as well to avoid interference with transmitters in France.
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nick :
The thing to remember about tropo is the propagation is frequency dependant, it will depend on the precise conditions at the time as to which frequencies will be ducted, and how well, and of course from where/which direction.
Lower UHF frequencies do tend to propagate better in normal circumstances, but the differences tend to be quite small.
Whilst ducting can come and go quite quickly {or be sustained for longer periods} it won't exactly "switch".
If you are seeing a difference in Quality figures of 30% in the day and when it's working nearer 70/80% I'm of the opinion that this is much more likely to be local interference and you are getting 70/80% when the source is turned off.
Rotating your aerial will of course see a drop in strength as the direction of Sandy passes out of the beamwidth of the aerial, but you might be able to see a greater reduction in quality for a fairly steady signal if it's pointing more towards the source of interference, and that effect will be much greater, the closer you are to that source.
I'm afraid it's a bit of a tedious job trying to track interference like this.
What you really need is a man with a spectrum analyser, but that is likely to cost.
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Maria:
Quest do not provide a catch-up service but they are on their owner's streaming service Discovery+.
The programme you want was actually called "How do they do it?" and was actually on at 1130pm and is S11/Ep11.{How it's Made is a different series}.
Whilst the Freeview channels can be streamed live on Discovery+, catch-up services are subscription.
The programme you want is available on Discovery+ and also on Amazon Prime if you have it.
I'm sure it will get repeated, it was first screened in 2014, but when and where I've not discovered so far!
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Chris Fennell:
I presume you've noticed that you've posted on the County Gates page. Purdown and County Gates are two separate transmitter sites.
As StevensOnln1 has said, if you ask your question we can probably help.
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Steve Donaldson:
I did mention in a reply back in April, that whenever I read reports from people on the east coast doing DX reception, I'd never seen C37 mentioned. C39 was quite frequently mentioned.
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Mr Dave Thomas:
The other thing to remember is IF you have no signal and were correctly tuned before, do NOT retune as this will often clear your correct tuning.
You then have to retune again when signals are back to normal and as you won't know when that is you may have to try several times.
You'll know if some/all of your tuning was cleared as channel numbers will be missing from your channel list.
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nick :
Under tropo conditions it is quite possible that it could reach you HOWEVER whilst you haven;t been totally clear about how often you are getting 30% Quality, you seem to suggest you usually get 70/80% during evenings. Now, AFAIK the French transmitter is on 24/7, the tropo has NOT been that regular or consistent that it would fit the pattern of events that you suggest.
I still think it's most likely that your problem with C37 is some quite local source of interference that you should be trying to search for.
Are you sure that there aren't any old devices in your household that have an analogue RF output - eg. an old Sky box, a Games console, a recorder of some sort {even VHS) and so on. Maybe one of your nearest neighbours has something?
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Wednesday 27 September 2023 3:58AM
nick :
There has been a bit of "tropo" around again, so no real surprise about Dover.
I still think it's more likely the problem with 37 is more local to you.