tony sayer wrote:
In article , Fredxx
scribeth thus
On 22/07/2011 08:34, funkyoldcortina wrote:
On 21/07/11 13:43, Fredxx wrote:
On 21/07/2011 13:35, Dave Plowman (News) wrote:
In article
,
Man at wrote:
UKTV. Half owned by the BBC (OK, the worldwide arm) so all the more
reason it should be FTA, or at least those progs originally funded by
license payers.
They are FTA via FreeView. And there is an extra cost for
transmitting via
satellite. Either requires a decent external aerial. The problem with
making it available free on satellite is it then becomes free to many
who
don't pay any UK licence.
If you think how many kWHrs are used to power terrestial transmitters, I
doubt they're much cheaper than leasing a satellite transponder.
The power used to operate terrestrial TV transmitters pales into
insignificance compared to the power used to launch a satellite into
space...
Not according to numerous articles. Googled and found 2, though I admit
they written by interested parties. However, just look how much CO2 is
produced by a few terrestial transmitters!! Something that can easily
be verified.
http://www.satellitetoday.com/via/gl...tes_22875.html
http://www.esoa.net/Green-Satellites.htm
And from that first link...
Some argue that digital television transmitters produce significantly
greater carbon emissions than satellite television systems, because
satellites rely on solar power for most of their power and thus provide
a greener alternative to expensive terrestrial buildouts. A U.K. trade
group, €œUK Space,€ estimated in 2006 that just the 50 most powerful
analog television transmitters in that country (out of a total of 1,400)
required 54 megawatts of electricity, representing a quarter of a
million tons of CO2 per year that could be replaced by satellites that
essentially use no terrestrial electricity at all.
55 analogue Tx's requiring 54 megawatts?..
Don't quite think so...
Probably isn't far off..each transmitter has several; 100KW units, and
they aren't 100% efficient.
Of course the energy over say 25 years of a satellites lifetime has to
be compared with the energy to put the satellites up in the first place...
And put in the context of the UK population as a whole. where it
represents less than a watt per person.
So just turn the lights off, watch Sky, and save the planet.