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<DIV><FONT size=2 face=Arial>I have just done the path loss calculations
assuming</FONT></DIV>
<DIV><FONT size=2 face=Arial></FONT> </DIV>
<DIV><FONT size=2 face=Arial>- 17 dbm transmission power (50 mw)</FONT></DIV>
<DIV><FONT size=2 face=Arial>- 20 db gain transmission antenna</FONT></DIV>
<DIV><FONT size=2 face=Arial>- 20 db gain receiving antenna</FONT></DIV>
<DIV><FONT size=2 face=Arial>- 3 db loss in cables</FONT></DIV>
<DIV><FONT size=2 face=Arial>- 2400 Mhz frequency</FONT></DIV>
<DIV><FONT size=2 face=Arial>- 127 km distance</FONT></DIV>
<DIV><FONT size=2 face=Arial></FONT> </DIV>
<DIV><FONT size=2 face=Arial>I calculate a received signal after antenna
gain of about -88 dbm which is a bit low for my liking.</FONT></DIV>
<DIV><FONT size=2 face=Arial></FONT> </DIV>
<DIV><FONT size=2 face=Arial>We probably would need to look into higher gain
antennas.</FONT></DIV>
<DIV><FONT size=2 face=Arial></FONT> </DIV>
<DIV><FONT size=2 face=Arial>Mind you I have assumed that each of our antennas
has 20db gain. I don't know what the gain figure would be for a 90cm offset
dish at 2400 mhz? Higher maybe? </FONT></DIV>
<DIV><FONT size=2 face=Arial></FONT> </DIV>
<DIV><FONT size=2 face=Arial>It is possible that your 2.4m dish has a higher
gain figure than 20db which would help give some margin.</FONT></DIV>
<DIV><FONT size=2 face=Arial></FONT> </DIV>
<DIV><FONT size=2 face=Arial>cheers Peter</FONT></DIV>
<DIV><FONT size=2 face=Arial> </FONT></DIV>
<DIV><FONT size=2 face=Arial></FONT> </DIV>
<DIV><FONT size=2 face=Arial></FONT> </DIV>
<DIV><FONT size=2 face=Arial></FONT> </DIV>
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<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="FONT: 10pt arial; BACKGROUND: #e4e4e4; font-color: black"><B>From:</B>
<A title=vk3pb@optusnet.com.au href="mailto:vk3pb@optusnet.com.au">Peter
Berrett</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A title=wireless@smithsgully.net
href="mailto:wireless@smithsgully.net">David Nuttall</A> ; <A
title=melbwireless@wireless.org.au
href="mailto:melbwireless@wireless.org.au">MW Wireless</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Saturday, December 31, 2011 12:35
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: [MLB-WIRELESS] World Wifi
record</DIV>
<DIV><BR></DIV>
<DIV><FONT size=2 face=Arial>Dear Dave</FONT></DIV>
<DIV><FONT size=2 face=Arial></FONT> </DIV>
<DIV><FONT size=2 face=Arial>I have a 90cm offset dish that I could tack my
cantenna onto and I live right by Mt Dandenong.</FONT></DIV>
<DIV><FONT size=2 face=Arial></FONT> </DIV>
<DIV><FONT size=2 face=Arial>I am off work until 10th January. Want to try for
the record? You would head out to Ballarat and I'd park myself up at
Skyhigh.</FONT></DIV>
<DIV><FONT size=2 face=Arial></FONT> </DIV>
<DIV><FONT size=2 face=Arial>The only issue is what dongle or router should I
use at my end? </FONT></DIV>
<DIV><FONT size=2 face=Arial></FONT> </DIV>
<DIV><FONT size=2 face=Arial>cheers Peter</FONT></DIV>
<DIV> </DIV>
<DIV> </DIV>
<DIV><FONT size=2 face=Arial></FONT> </DIV>
<DIV><FONT size=2 face=Arial></FONT> </DIV>
<DIV><FONT size=2 face=Arial></FONT> </DIV>
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<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="FONT: 10pt arial; BACKGROUND: #e4e4e4; font-color: black"><B>From:</B>
<A title=wireless@smithsgully.net
href="mailto:wireless@smithsgully.net">David Nuttall</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A
title=melbwireless@wireless.org.au
href="mailto:melbwireless@wireless.org.au">MW Wireless</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Wednesday, December 28, 2011 1:18
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: [MLB-WIRELESS] World Wifi
record</DIV>
<DIV><BR></DIV>Hi Peter,<BR><BR>How about we start out with the Australian
WiFi record? I believe the W.A. guys established a fairly long link
out to Rottnest Island some time back. However, I know of no longer
link than Peter Buncle's hop from Kallista to the original Highton location
at around 100 Km's.<BR><BR>A Picnic/BBQ trip to Mt Buninyong would give us a
path of 127 Km back to node GHO at Mt Dandenong.<BR><BR>I donated a 2.4 m
domestic sat dish and Rob B built up a 2.4 GHz feed and tripod for the
dish. They are still sitting in my shed ready for such a
project.<BR><BR>Regards<BR><BR>Dave<BR><BR><BR><BR>On 27/12/2011 10:30 PM,
Peter Berrett wrote:
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<DIV> </DIV>
<DIV><FONT size=2 face=Arial>Hi all</FONT></DIV>
<DIV> </DIV>
<DIV><FONT size=2 face=Arial>Would anyone out there be interested in
attempting the world unamplified 2.4 ghz wifi record?</FONT></DIV>
<DIV> </DIV>
<DIV><FONT size=2 face=Arial>The record I think is held by some
Venezuelans (some Italians hold the 5.7 Ghz record).</FONT></DIV>
<DIV><FONT size=2 face=Arial></FONT> </DIV>
<DIV><FONT size=2 face=Arial>The strategy would be as follows</FONT></DIV>
<DIV> </DIV>
<DIV><FONT size=2 face=Arial>1. Use an established MW node such as
GHO North as one end of the link.</FONT></DIV>
<DIV> </DIV>
<DIV><FONT size=2 face=Arial>2. Go about 400 km+ in the direction
the node antenna is pointing and erect a node and directional
antenna, perhaps solar powered, with a small computer and high gain
antenna pointing at the MW node. Perhaps our friends at the Adelaide
wireless group could set up a node in their group pointing at
us? </FONT></DIV>
<DIV> </DIV>
<DIV><FONT size=2 face=Arial>3. Monitor 2.4 ghz beacons and when there is
some tropospheric ducting try the link. Or better still just automate
things so that when the station is heard it automatically tries to
transfer a video from one end of the link to the other.</FONT></DIV>
<DIV> </DIV>
<DIV><FONT size=2 face=Arial>Successful transfer of video = world
record</FONT></DIV>
<DIV> </DIV>
<DIV><FONT size=2 face=Arial>cheers </FONT></DIV>
<DIV> </DIV>
<DIV><FONT size=2 face=Arial>Peter VK3PB</FONT></DIV>
<DIV> </DIV>
<DIV> </DIV>
<DIV> </DIV>
<DIV> </DIV>
<DIV> </DIV>
<DIV><FONT size=2 face=Arial></FONT> </DIV><BR>
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