Re: Satellite reception problems
- From: "Tom E" <TE@xxxxxxxxxxxxxx>
- Date: Thu, 30 Apr 2009 16:23:42 +0100
"Jeff Layman" <jmlayman@xxxxxxxxxxxxxxx> wrote in message
news:gtce3h$mma$1@xxxxxxxxxxxxxxxxxxxx
After setting up reception on Astra 2 ok earlier in the year, leaf
appearance has badly affected reception here in West Sussex (I thought it
might...) . The beam arrives effectively in the "V" created by the crowns
of a couple of partially overlapping trees. One of these is a damn great
sycamore - already around 25 m high - but with a lot more growth left in
it. That is the one causing the problem.
But why has it affected horizontal polarisation reception much more than
vertical? I've checked the LNB and that hadn't moved. But just in case I
loosened and rotated it clockwise and anticlockwise in several positions.
No difference in the non-existent H reception, but eventually lost V too,
so put it back where it was. Minor adjustment of the dish resulted only
in losing the V reception as well as the H.
Options are limited. At present the dish (65 cm) is on the bottom end of
a 1.5" 16g galvanised steel pole between a 24" K and T bracket, just below
the gutter line. The T is at the extreme bottom of the 3m pole, with the
K about 50 cm above it. At the top of the pole is an 18-element group A
yagi (Crystal Palace), and about 50 cm below that is a 15-element group E
yagi (Midhurst). I suppose I could move the dish up about 1.5 m to just
below the Midhurst aerial, but would it interfere with it? Also, with the
dish now well above the gutter, and much more exposed to the wind, the
pole would be taking much more strain. As would the T and K mounts, which
seem to be fixed with a 5 x 12mm AF hex-headed screws into some sort of
plastic plug fixing. I suppose I could get another mount and move the
dish back, but I can't add more than a couple of meters, and that
translates to only 1 metre in gained height at the tree. Also, that would
only work in the same line-of-sight - moving it back along the same wall
would only change the beam direction to right through the main part of the
tree crown! And it would probably only gain a couple of years' viewing
before the tree obscured that signal too.
Any suggestions other than a chainsaw?
--
Jeff
I cant answer your Q but must leave that to the eggspurts but,
see my previous post of 17/4 where I thought a Silver Birch was the culprit
for my occasional poor reception. Since posting I have been a Sat Dish
anorak...........I look at almost all dishes to see just what or who they
are pointing at. From this I concluded that my tree (65M away) was not the
problem or rather others MUST be having much worse reception than me cos
their dishes are well into or looking straight at much higher trees than me.
I am still not sure about my occasional break-up because it occurs in good
and bad weather conditions.
Just one thought, my dish looks across the Soton Airport flight path, would
aircraft cause a break-up.
Just this morning my Freeview was experiencing a few problems when it is
normally rock solid. In this case I very much suspected the outside
broadcast camera that was breaking up.
PS Its peeing down here in Hants today.
.
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