All posts by Dave Lindsay
Below are all of Dave Lindsay's postings, with the most recent are at the bottom of the page.
Johan: You are only likely to receive the PSB (Public Service Broadcaster) channels. Aerials installed for analogue on the Hope transmitter would be expected to work for all channels it carries.
As you are not able to receive from Emley Moor, you will have to look to Freesat or other satellite service.
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Johan: Unfortunately only the main transmitters which serve relatively large number of viewers get all the channels. For an explanation see:
Londonderry (Northern Ireland) Freeview Light transmitter | ukfree.tv - 11 years of independent, free digital TV advice
Try manually tuning to UHF channel 28 for BBC services. Perhaps you need to adjust the aerial's alignment.
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Johan: One thing to be aware of is that the Shatton Edge transmitter is only 26 degrees clockwise of the Hope one, it also being vertically polarised.
So on ITV, see whether you're tuned to Hope on C22 or Shatton Edge on C54, this information usually being given on the signal strength screen.
Shatton Edge is further away but it's more powerful. You don't have line-of-sight to Shatton Edge and it's touch and go as to whether you do for Hope.
If you have aligned your aerial using Shatton Edge on C54 then its BBC is on C58. However, you might find that reception from Hope is better and so you would want to scrub round C54 and try aligning your aerial for best reception of C28 and C22.
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jb38: Where are you getting the figure from for the height of the Shatton Edge transmitter?
mb21 quotes the structure height as being 45m. The relevant page on this site quotes 415m AOD. Both of these result in the same plot:
Terrain between ( m a.g.l.) and (antenna m a.g.l.) - Optimising UK DTT Freeview and Radio aerial location
Terrain between ( m a.g.l.) and (antenna m a.g.l.) - Optimising UK DTT Freeview and Radio aerial location
Your plot shows the Shatton Edge transmitter tower to be approximately 330m high! Are you drunk already?
This is my plot to the Hope transmitter, which shows it's touch-and-go as to whether there is line-of-sight, or certainly no blockage of the first Fresnel zone:
Terrain between ( m a.g.l.) and (antenna m a.g.l.) - Optimising UK DTT Freeview and Radio aerial location
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gareth: PSB2, which is the multiplex you are missing, has a negative offset from the Douglas transmitter. This means that the frequency of the signal is slightly below the centre of the channel.
Some older TVs and set-top boxes can't cope with signals with negative offsets. What's the make and model of the set so this can be checked out?
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Ash: Using the booster (having it powered on) can cause it to fail, just like any electrical appliance.
Have you tried viewing TV without it?
Also, if you turn off the power whilst viewing the signal strength screen on ITV, does the strength drop or does it stay the same?
If it stays the same it suggests that your booster isn't doing much.
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Ash: Try removing the booster completely by connecting the cable coming in from the aerial to the TV. If there is a wall socket rather than a cable, connect the TV directly to it using a suitable cable.
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Martin L: BBC Three HD and CBBC HD are carried on the existing HD multiplex which carries BBC One HD, BBC Two HD, ITV HD and Channel 4 HD. Thus, it is available from all transmitters now.
BBC News HD and BBC Four HD are available only from a few select transmitters and not all transmitters which will carry them do so now. Mendip's new HD mux won't come on air until some time next year (date not published by Digital UK).
I imagine that your TV has tuned in the new mux from Wenvoe, which is on air now. This is the best you can hope for until the Mendip one starts.
On the manual tune screen of the Humax, where you select 58, you need to select DVB-T2 rather than DVB-T.
The new mux from Wenvoe is on C31. You should be able to confirm that your TV is tuned to this by viewing the signal strength screen whilst on BBC News HD.
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Johan : The bearing to the Hope transmitter is 81 degrees.
The transmitter you're aiming for is photographed here:
mb21 - The Transmission Gallery
That page also has links to maps indicating its location.
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Friday 20 December 2013 7:06PM
Syd: A terrain plot is here:
Terrain between ( m a.g.l.) and (antenna m a.g.l.) - Optimising UK DTT Freeview and Radio aerial location
The transmitter is 43 miles away and at 24 miles from you is Hensbarrow Beacon. Near to you there are more obstructions in the form of the terrain and objects on the ground.
For lots of information, see:
Aerials, TV Aerial and Digital Aerial
A wideband, or semi-wideband yagi aerial isn't as good on Group A channels, which Caradon Hill uses exclusively.
Rowridge Transmitter
Also, in the future Redruth could potentially use Group A channels, this being after 2018 when frequencies are replanned in order to clear more for use by mobile phone/broadband services.