Aerial installation experts.
05 February 2011, 12:03 PM
#31
Scooby Regular
If he lives in Leeds/Wakefield I doubt he'll need a High gain. 9 times out of 10 a 14/18 element does the job.
You're quite right mart about the amplifier.
Minimum digital strength at the point of tv has to be 45db without amplification max is 60db
You're quite right mart about the amplifier.
Minimum digital strength at the point of tv has to be 45db without amplification max is 60db
05 February 2011, 12:56 PM
#32
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05 February 2011, 01:33 PM
#33
Scooby Regular
Go here .... http://www.wolfbane.com/cgi-bin/tvd.exe?DX=L&OS ... to get an idea of your local transmitters and the recommended aerial type. There is more than one type of digital aerial!
Dave
Dave
"A good multi-director Yagi array with a low-noise masthead amplifier. "
whatever that is
05 February 2011, 01:44 PM
#34
Scooby Regular
No postcode checker will give you a accurate answer as they're total garbage. How can the checker tell iff you have a tree in the line of direction.
The only way you'll get the right aerial is carrying a signal test on your roof fact.which most companies will do for free.
The only way you'll get the right aerial is carrying a signal test on your roof fact.which most companies will do for free.
05 February 2011, 03:22 PM
#35
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"... The results from this predictor should only be used as a rough indication as to which transmitters might be available at a specified location. Please note that the calculations take no account of local surroundings (e.g. trees and buildings), the directional radiation patterns of some transmitters ( e.g. coastal restrictions) nor sources of interference (e.g. strong adjacents). ........
"Antenna suggestions" are a rough guide only; a minimum height of 10 metres is normally recommended. Where an "amplified extra hi-gain" system is suggested, the minimum would probably be a good multi-director Yagi array with a low-noise masthead amplifier. All calculations are conservatively based on the weakest multiplex and are intended to ensure adequate input for an "original" DTT receiver; they include losses from cable, terminations and a fade margin.
* - where the field strength is asterisked, there is a possibility of multipath reception effects. It might be worth trying again with a greater antenna height.
Some postcode areas are rather large - better precision is possible using an Ordnance Survey grid reference, if available. Also, some postcodes have not yet been included in the database. ..... "
It gives you a better idea than if you just wander in off the street and say 'I want an aerial'. When we looked at a new aerial at our last place (sent Sky in the end) that site recommended a Group B aerial (IIRC) and when I mentioned it to the aerial guy he said 'Oh, most people don't know anything about different groups ...'. Even though I only know/knew enough to be dangerous it puts the aerial installer on the back foot, thinking 'I'd better not mess this guy about'. Not that you fit the description of a "rogue" installer antc ....
Dave
05 February 2011, 04:26 PM
#36
Scooby Regular
We get alot of people like that act like they know. But we know they know f-all or they wouldn't be calling us to do it.
Mention a few technical terms and they soon look silly
Also when they've read what transmitter they should be on and insist it goes to that one against my advice. I gladly charge them to go back and re align to the right transmitter.
Mention a few technical terms and they soon look silly
Also when they've read what transmitter they should be on and insist it goes to that one against my advice. I gladly charge them to go back and re align to the right transmitter.
06 February 2011, 08:20 AM
#37
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Before you go off to the aerial shop, are you sure that your freeview reciever is using the strongest available signal for a particular channel?
Eg, when I first fired up my digi telly, the ' film 4' it dropped into ch15 was turd, barely watchable, yet an almost perfect film 4 signal was allocated to something like channel 801 on the freeview telly. This was the same for most of the channels when doing an auto tune.
It was a faff, but did it all manually and rarely get any loss of quality.
Eg, when I first fired up my digi telly, the ' film 4' it dropped into ch15 was turd, barely watchable, yet an almost perfect film 4 signal was allocated to something like channel 801 on the freeview telly. This was the same for most of the channels when doing an auto tune.
It was a faff, but did it all manually and rarely get any loss of quality.
06 February 2011, 12:39 PM
#39
Scooby Regular
Before you go off to the aerial shop, are you sure that your freeview reciever is using the strongest available signal for a particular channel?
Eg, when I first fired up my digi telly, the ' film 4' it dropped into ch15 was turd, barely watchable, yet an almost perfect film 4 signal was allocated to something like channel 801 on the freeview telly. This was the same for most of the channels when doing an auto tune.
It was a faff, but did it all manually and rarely get any loss of quality.
Eg, when I first fired up my digi telly, the ' film 4' it dropped into ch15 was turd, barely watchable, yet an almost perfect film 4 signal was allocated to something like channel 801 on the freeview telly. This was the same for most of the channels when doing an auto tune.
It was a faff, but did it all manually and rarely get any loss of quality.
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