> Fortunately for me, my Dish TV antenna is within reach -- bolted to a post
> below a deck -- and I periodically go out with a broom and sweep the snow
> of it. At least on the receiving end, that takes care of it. Generally
> it's the heavy wet snow that's the worst -- other types don't accumulate
> so much.
With mine it doesn't have to be covered. Just heavy rain or snow between me
and the satellite and it's a dark screen. I need a larger dish.
Roger Halstead (K8RI and ARRL 40 year Life Member)
N833R - World's oldest Debonair CD-2
www.rogerhalstead.com
>
> 73 - Rich, KE3Q
> ----- Original Message -----
> From: Michael Tope<mailto:W4EF@dellroy.com>
> To: Dan Hearn<mailto:dhearn@wwnw.net> ;
> Towertalk@Contesting.Com<mailto:Towertalk@Contesting.Com>
> Sent: Monday, October 31, 2005 9:13 PM
> Subject: Re: [TowerTalk] Snow and rain attenuation
>
>
>
> ----- Original Message -----
> From: "Dan Hearn" <dhearn@wwnw.net<mailto:dhearn@wwnw.net>>
> To: "Towertalk@Contesting.Com<mailto:Towertalk@Contesting.Com>"
> <towertalk@contesting.com<mailto:towertalk@contesting.com>>
> Sent: Monday, October 31, 2005 8:28 AM
> Subject: [TowerTalk] Snow and rain attenuation
>
>
> >I have been compelled to use dial up ISP service for some time. Recently
> a
> > high speed RF link service has become available. It operates on 5.7ghz.
> > The
> > ISP transmitter is located on a mountain top at about 15 miles distance
> > and
> > I have line of sight to it. The operator has recently increased power
> and
> > thinks an acceptable signal to my location is available. They are ready
> to
> > test for this.
> > I am concerned that our frequent snow and rain this winter might
> result
> > in
> > unreliable signal levels. The receiver end uses a dish and my
> experience
> > with the Dish TV system is that less than an inch of snow on the
> reflector
> > kills the signal. The ISP antennas on the mountain top are in a snow
> > environment all winter for sure. They may have heaters on their
> antennas
> > to
> > solve this problem at that end.
> > Has anyone had experience in a situation like this? Should I stick
> with
> > my
> > dial up?
> >
> > 73, Dan, N5AR
>
> Assuming that your ISP is using proper radomes at the mountaintop
> headend,
> then you are probably okay. You can probably get by with a coarse mesh
> dish for wireless at 5.8 GHz (barbecue grill) since you don't care so
> much
> about system temperature (you are going to be pointed at a 300 kelvin
> target),
> so snow collection on your antenna may not be too big a problem. The fact
> that
> you will be pointed close to the horizon instead of up toward the
> equatorial
> plane
> like your DBS antenna should help as well. Rain fade shouldn't be too bad
> at
> 5.8 GHz, but if it turns out that it is, you can just put up a bigger
> receive antenna
> to add margin to the link (doubling the diameter of your RX antenna will
> add
> roughly 6dB to the link fade margin).
>
> Also see if your wireless ISP will provide dial-backup. When I lived in
> Pasadena, Ca my cable modem provider (Charter) used Earthlink as an ISP,
> so
> you automatically got access to dial-backup when you subsribed to their
> cable
> modem service.
>
> 73 de Mike, W4EF............................................
>
>
> _______________________________________________
>
> See: http://www.mscomputer.com<http://www.mscomputer.com/> for "Self
> Supporting Towers", "Wireless Weather Stations", and lot's more. Call
> Toll Free, 1-800-333-9041 with any questions and ask for Sherman, W2FLA.
>
> _______________________________________________
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>
> http://lists.contesting.com/mailman/listinfo/towertalk<http://lists.contesting.com/mailman/listinfo/towertalk>
> _______________________________________________
>
> See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless
> Weather Stations", and lot's more. Call Toll Free, 1-800-333-9041 with
> any questions and ask for Sherman, W2FLA.
>
> _______________________________________________
> TowerTalk mailing list
> TowerTalk@contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk
>
_______________________________________________
See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless Weather
Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any questions
and ask for Sherman, W2FLA.
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