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900 Mhz - Non line of site

Author
4 Feb 2005 3:36 PM
kinghammer_head99
Hi,

I want to be able to connect two locations (approx 4 miles) that do
not have clear line of site. There is some wooded areas between the
two locations. Aside from that there are no obstacles in the way.

I have access to some LinkSys WRT54G's - Is there anyway to make this
work?

I guess what I am not clear on is whether it as simple as using 900Mhz
antennas in stead of the 2.4 Ghz ones. If so, does anyone have any
links to sites where people have done such a thing?


Thanks

Author
4 Feb 2005 7:59 PM
no.one
On 4 Feb 2005 07:36:48 -0800, j**@webhart.net (kinghammer_head99) wrote:

>Hi,
>
>I want to be able to connect two locations (approx 4 miles) that do
>not have clear line of site. There is some wooded areas between the
>two locations. Aside from that there are no obstacles in the way.

A pair of high gain antennas at a mutually visible third location (say, top
of a hill), coupled together, one aimed at one site and one at the other,
could serve as a no-power-needed passive relay. You'd need good power
output and a good directional antenna at both of the active sites, most
likely.

>I have access to some LinkSys WRT54G's

These can be modified to serve as relays, but they will need power to run
them... less than an amp.  The Sveasoft firmware allows you to alter the
operating power, so you can reduce the power consumption to the minimum
needed, and feed one from a solar panel/battery combo, if there's no power
at the relay point.

>I guess what I am not clear on is whether it as simple as using 900Mhz
>antennas instead of the 2.4 Ghz ones.
<snip>

900MHz antennas will not work.
Author
5 Feb 2005 12:39 AM
Mark McIntyre
On 4 Feb 2005 07:36:48 -0800, in alt.internet.wireless , j**@webhart.net
(kinghammer_head99) wrote:

>Hi,
>
>I want to be able to connect two locations (approx 4 miles) that do
>not have clear line of site.

Just a small point of pedantry: its line of /sight/. As in you can see from
one place to the other. The phrase line of site has zero meaning.

--
Mark McIntyre
CLC FAQ <http://www.eskimo.com/~scs/C-faq/top.html>
CLC readme: <http://www.ungerhu.com/jxh/clc.welcome.txt>

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Author
8 Feb 2005 12:56 AM
kinghammer_head99
Show quote Hide quote
no.***@no.gov wrote in message news:<4203d310.10529484@news.individual.de>...
> On 4 Feb 2005 07:36:48 -0800, j**@webhart.net (kinghammer_head99) wrote:
>
> >Hi,
> >
> >I want to be able to connect two locations (approx 4 miles) that do
> >not have clear line of site. There is some wooded areas between the
> >two locations. Aside from that there are no obstacles in the way.
>
> A pair of high gain antennas at a mutually visible third location (say, top
> of a hill), coupled together, one aimed at one site and one at the other,
> could serve as a no-power-needed passive relay. You'd need good power
> output and a good directional antenna at both of the active sites, most
> likely.
>
> >I have access to some LinkSys WRT54G's
>
> These can be modified to serve as relays, but they will need power to run
> them... less than an amp.  The Sveasoft firmware allows you to alter the
> operating power, so you can reduce the power consumption to the minimum
> needed, and feed one from a solar panel/battery combo, if there's no power
> at the relay point.
>

Thanks for the reply. Was wondering if you could clarify this for me.
Does this require that the relay point have two radios configured as
relays or is it one radio configured as a relay with two antennas?
(each pointed to a separate location).



Show quoteHide quote
> >I guess what I am not clear on is whether it as simple as using 900Mhz
> >antennas instead of the 2.4 Ghz ones.
> <snip>
>
> 900MHz antennas will not work.
Author
8 Feb 2005 1:27 AM
kinghammer_head99
Mark McIntyre <markmcintyre@spamcop.net> wrote in message news:<vb5801tv4pbnlffnneps1t4e4vsgt7k4rl@4ax.com>...
> On 4 Feb 2005 07:36:48 -0800, in alt.internet.wireless , j**@webhart.net
> (kinghammer_head99) wrote:
>
> >Hi,
> >
> >I want to be able to connect two locations (approx 4 miles) that do
> >not have clear line of site.
>
> Just a small point of pedantry: its line of /sight/. As in you can see from
> one place to the other. The phrase line of site has zero meaning.

Thanks