Re: [amsat-bb] trees

["Don Woodward" <dbwoodw@xxxxxxxxxxx>]

Roy:

I can guarantee he is not shooting directly though leaves and receiving a signal
at 12GHz. Keep in mind that the DSS dishes have offset feeds, so it may look
like the dish is physically pointing through the trees, but they are actually
looking higher. I've done quite a few DSS dish installations of my own as well
as for family members, and I've never been able to make them work without a
completely clear path..

73's

Don Woodward
KD4APP
AMSAT 33535
kd4app@amsat.org
http://kd4app.webhop.org


----- Original Message -----
From: <rdwelch@swbell.net>
To: "Bruce Nolte N3LSY" <brucenol@abs.net>
Cc: "Bob V Johnson" <w7lrd@juno.com>; <amsat-bb@AMSAT.Org>
Sent: Saturday, July 13, 2002 14:23
Subject: Re: [amsat-bb] trees


My neighbor recently had a satellite TV dish being installed on his roof.
I think this is the 12gHz service.  I talked with him about the fact that
he is shooting through two trees on my lot and a grove of 5-6 big ones in
the next yard beyound mine.  He said the company told him he might have a
little snow with heavy rain but didn't say anything about the trees.  Well,
surorise, surprise.  He is getting 170 channels of snow free reception!
The company must be desperate however because they gave him the
installation, free equipment including three receivers and a monthly rate
the same as he was paying for cable.  I wonder if anyone can account for
this "tree performance."  The trees are sycamore, box elder and black
walnuts, all 50 feet in height or more.  He is shooting right through the
leafy part of the trees, not below it.

Bruce Nolte N3LSY wrote:
>
> Bob V Johnson wrote:
>
> >Hello
> >Just how attenuating are fir trees at 2.4Ghz?  I was trying to work  into
> >Europe and could not even hear the MB.  Would a bigger dish help?  I'm
> >fairly new on AO-40 and I haven't had more fun since I lit up my first
> >vacuume tube!
> >73...Bob...W7LRD
> >Seattle
> >----
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> >
> >
> >
> >
> Same problem here on the East coast Bob. Trees are a major PITA, I have
> a large walnut tree that blocks my view to the east and Southeast, and
> last night I could barely make out the beacon through the trees, but my
> setup pulls down a solid S7 or better then the satellite is in the clear
> at similar squints. Trees even affect  TVRO class AO-40 setups
> profoundly, so the only alternatives are to find a location in your yard
> with fewer leafy obstructions to set up your dish, put the works on a
> tower so it shoots above the trees (but Douglass Firs can get huge), or
> get out the chainsaw.
>
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--
73, Roy -- W0SL

E-Mail: rdwelch@swbell.net
Home Page: http://home.swbell.net/rdwelch
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