All posts by Dave Lindsay
Below are all of Dave Lindsay's postings, with the most recent are at the bottom of the page.
zoe: An exact location, preferrably in the form of a post code might help assess the possibility of reception of another transmitter. The question is perhaps not quite one of "if" you direct your aerial at another transmitter, but rather if you can ever receive a stable signal from another transmitter.
The fact that Truro is in a valley reduces the chances; indeed the reason for the need for the relay is because the populas is low down and cannot "see" any other transmitter.
The reason you only get a limited number of channels from the Truro relay is outlined in the link provided by Briantist on 17 January. As explained, this is unlikely to change.
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Linda: Is your aerial pointing north or south?
I guess that it is likely to be north, in which case you are receiving from Hannington. On 8th February the first stage of Hannington's switchover completed. This meant that BBC Two on analogue was switched off and replaced with BBC standard definition digital channels.
At the present time you should be able to receiver BBC One, ITV and Channel 4 on analogue, not sure about Channel 5 analogue at your location. You should also get BBC channels on Freeview and these are as they will be when switchover has completed. If you cannot get any of these, then there is perhaps need for concern.
What equipment do you have (makes and models please)?
Can you get BBC One, BBC Two and BBC News on digital?
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Deb: If the booster is one that is connected to the aerial lead where it comes into your room, then remove it.
If, after doing this, you get no signal whatsoever on any channel, then perhaps it is not a booster, but a power supply for a booster which is located on the roof with the aerial. The reason you would get no signal in such circumstances is because the booster is still connected (on the roof) but is not powered (as you've removed its power supply).
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Joe: If you're looking at DIYing it, then have a look at the highly informative ATV Sheffield website: A.T.V (Aerials And Television) TV Aerial, DAB Aerial, FM Aerial.
However, follow this link for a plot of the line between you and the transmitter:
Terrain between ( m a.g.l.) and (antenna m a.g.l.) - Optimising UK DTT Freeview and Radio aerial location
You are about 10m ASL and 13 miles from Rosneath and the transmitter antenna is 216m ASL. About 8miles from you is Dunrod Hill which is 298m ASL. If you click the link below the plot it will show a map with a line between you and the transmitter.
I'm not an aerial installer or expert in the propagation of RF signals, so I may stand to be corrected by the professionals, but I don't think you have any chance whatsoever of receiving from Rosneath at your location.
I think that you should consider Freesat. For terrestrial television you will have to go with the limited output of the Largs relay.
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Deb: You have narrowed down the source of the issue. I wouldn't be of the opinion that there is a fault with BT Vision box just yet.
I'm not familiar with the BT Vision box, but in general terms I know that it connects to the internet either wirelessly (using wi-fi) or wired (using a network cable, sometimes routed over mains cables using "Powerline" adaptors or similar).
If you are connected using wi-fi, try disabling the connection in the box's settings. If you are connected using a network cable, unplug the cable from the box and unplug it at the other end. If you have a Powerline adaptor adjacent to the BT Vision box, then unplug it from the mains and try the reception of TV channels on the BT Vision box.
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Nikki Halsall: Oxford looks to be your most likely transmitter. It is at 162 degrees from your location which is therefore a bit anti-clockwise of south. The aerial should be horizontal. When you go on to the signal strength screen it should tell you that it is tuned to channel 53 (which is the BBC signal from Oxford).
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Nikki Halsall: I should also warn you that the commercial multiplexes from Oxford are on low power until 18th April. This includes ITV3, Pick TV, Yesterday and others. Thus, if you have issues receiving these, then that might be the reason why.
The Public Service Broadcaster multiplexes are on full power now. These include BBC, ITV1, ITV2, C4, E4, More4, C5, HD and a few others.
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Keith Seymour: This is not likely. See Will there ever be more services on the Freeview Light transmitters? for an explanation.
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Tuesday 14 February 2012 2:20PM
Milner Fleming: It is not available on Freeview.