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Old August 22nd 07, 03:20 AM posted to rec.radio.amateur.antenna
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Default "Extension" antenna ?in?sanity check, please?


"Dave Platt" wrote in message
...
In article ,
Rick wrote:

Since you have so much signal at the router, you might get away with it,
even
though there will be a lot of loss in the coax. Incidentally it is
probably
RG-59.


One on-line coax-loss calculator indicates about 144 dB of loss in
RG-59, at 2.4 GHz over an 800-foot span.

Added to the antenna losses at both ends, and I have real doubts as to
whether a usable signal will result. It *might* work if the 802.11
radios were plugged directly into the coax, with no antennas involved,
but that does not sound feasible.

If you loss on the cable is correct it will not work even if the computer is
wired directly to the router. If I remember correctly a router puts out
about a plus 20 db signal and the rx requires about -86db. Ive done this
between two building where a big low loss 75 ohm hardline was already in
place. just barely getting enough signal at 500 yds.

Jimmie


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