On Sun, 05 Oct 2008 16:45:43 GMT someone who may be "George"
wrote this:-
Hi-gain,outdoor in the region of £20/25
Is she in a poor reception area?
Television aerials are, like most things, not something where there
is a simple answer. If you want to get the right aerial study the
pages from http://www.aerialsandtv.com/atvschoiceofaerials.html
and gain an understanding of what you want.
As someone else has said, the first thing to know is which
transmitter the signals come from. From that you can find out which
group the transmitter signals were in originally, which groups they
are in now (note that analogue Channel 5 is often out of the
original group too) and which group(s) they will be in after the
switchover. From that and the signal strength you can decide which
aerial(s) you want.
Most transmitters will revert to one group at switchover. Thus most
people don't need to change aerials. People may want to change
aerial if they cannot get all of the digital channels at the moment,
but they should be made aware that in a few years they may get them
anyway with their current aerial. What follows is aimed at those who
will not be in this position after the switchover, about half a
dozen of the main transmitters.
In strong and medium signal areas the choice is easy, a log
periodic. These were developed by navies specifically to have a wide
response and are superb aerials for these circumstances. They don't
have a downside, except that they don't look like the sort of aerial
many expect. The fact that so few are seen shows the triumph of
something over substance.
In poor signal areas the choice is more difficult. An enormous
wideband aerial may work, at least until the wind attacks it.
However, there is a lot to be said for a more subtle approach. If
the signals are/will be in two groups then a more subtle approach is
to use two aerials, each of a different group, which are combined
into one lead. These can be pointed at the same or different
transmitters, depending on location
http://www.aerialsandtv.com/ampsandsplitters.html#CombineTheSignalsFromTwoAeri als.
--
David Hansen, Edinburgh
I will *always* explain revoked encryption keys, unless RIP prevents me
http://www.opsi.gov.uk/acts/acts2000/00023--e.htm#54