All posts by Chris.SE
Below are all of Chris.SE's postings, with the most recent are at the bottom of the page.
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.
| link to this comment |
Debbie:
As listed towards the top of this page, Channel4+1 is available at Freeview LCN15, Freesat 121 & Sky 204
| link to this comment |
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.
| link to this comment |
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.
| link to this comment |
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.
| link to this comment |
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!
| link to this comment |
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.
| link to this comment |
Tuesday 26 September 2023 5:38PM
Elizabeth Simpson:
Sandy Heath still has Planned Engineering this week. Lots of main transmitters in particular have had several periods, some extended, of Planned Engineering. It's a good 10 years since DSO and no doubt lots of maintenance and some equipment replacement is needed. Some work is not easily done in winter.
Forgot to mention above, if you were correctly tuned, do NOT retune when the signal disappears, it'll probably clear your correct tuning.