No subject
Sat Mar 20 08:49:14 EST 2010
I guessed an antenna height of 300 ft when I did the plots. Take the
difference between 300 and the "real" antenna height and add/subtract
from 2073 and you'll have your figure.
<div class="im"><br>
<br>
Typical antennas gains are<br>
1. dipole - probably 1dB in some direction, depending on distance from
support mast<br>
2. 2 x dipole - 3dB<br>
3. 4 x dipole - 6dB<br>
4. double extended Zepp (each dipole half = 5/8) 3dB<br>
5. 3 halfwaves in phase = 3dB<br>
<br>
An error of 1-2dB in your "guess" will be mostly insignificant on the
radius of the resulting coverage circle.<br>
<br>
Cheers ... Ray <br>
<br>
<br>
       --==[ SPLAT! v1.2.1 Site Analysis Report For: Nardi ]==--<br>
<br>
---------------------------------------------------------------------------<br>
<br>
Site location: 28.5447 South / 206.7138 West (-28� 32' 40" S / 206� 42'
49" W)<br>
Ground elevation: 2608.27 feet AMSL<br>
Antenna height: 300.00 feet AGL / 2908.27 feet AMSL<br>
Antenna height above average terrain: 2073.38 feet<br>
<br>
Average terrain at  0 degrees azimuth: 689.75 feet AMSL<br>
Average terrain at 45 degrees azimuth: 756.54 feet AMSL<br>
Average terrain at 90 degrees azimuth: 1060.91 feet AMSL<br>
Average terrain at 135 degrees azimuth: 1151.16 feet AMSL<br>
Average terrain at 180 degrees azimuth: 686.42 feet AMSL<br>
Average terrain at 225 degrees azimuth: 585.24 feet AMSL<br>
Average terrain at 270 degrees azimuth: 919.58 feet AMSL<br>
Average terrain at 315 degrees azimuth: 829.48 feet AMSL<br>
<br>
---------------------------------------------------------------------------<br>
<br>
<br>
<br>
<br>
</div>
<div>
<div class="h5">On 09/08/10 18:28, Steve Sharp wrote:
<blockquote type="cite">
<div>G'day Ray - project is on the move again - the GM300 has
been repaired and aligned and I have taken a look at the digi_ned link
you sent regarding PHG and I'm sure we can add it as soon as the tech
tells me the HAAT and gain of the antenna.<br>
</div>
<div>At this stage I have to program up the Foxdigi witht he site
info and post it away to the installer who will get it up on Nardi next
time he is workign at the site.</div>
<div>Â </div>
<div>Hopefully this'll kick interest along and we'll get some
others up in the months to follow.....</div>
<div>Â </div>
<div>73 de Steve VK2POO<br>
</div>
<div class="gmail_quote">On 23 July 2010 13:36, Ray Wells <span
dir="ltr"><<a moz-do-not-send="true"
href="mailto:vk2tv at exemail.com.au" target="_blank">vk2tv at exemail.com.au</a>></span>
wrote:<br>
<blockquote
style="border-left: 1px solid rgb(204, 204, 204); margin: 0px 0px 0px 0.8ex; padding-left: 1ex;"
class="gmail_quote">
<div bgcolor="#ffffff" text="#000000">Hi Steve,<br>
<br>
PHG is (P)ower, (H)eight, (G)ain and is sent in a beacon as in this
UIDigi example from VK2RMC-1. Software that handles PHG will display a
coverage circle around the digi site based of the information
transmitted by the digi.<br>
<br>
Beacon1Text           =      !3056.77SS15243.92E#PHG5513/ Kempsey, NSW<br>
<br>
Beacon2Text           =      !3056.77SS15243.92E#PHG5513/ Kempsey, NSW<br>
<br>
Beacon3Text           =      :146.875- *111111z3048.00S/15255.00Er
R50k<br>
<br>
<br>
The 5513 says<br>
5Â Â Â Â 25W<br>
5 Â Â Â antenna 320 feet above average terrain<br>
1Â Â Â 1dB antenna gain<br>
3Â Â Â pattern offset towards 135 degrees.<br>
<br>
Take a look here for further explanation<br>
<br>
<a moz-do-not-send="true"
href="http://digined.pe1mew.nl/?How_to:Calculate_PHG_information"
target="_blank">http://digined.pe1mew.nl/?How_to:Calculate_PHG_information</a><br>
<br>
The extra S after Latitude causes a green star with the letter S to be
displayed as the digi icon.<br>
<br>
Beacons 1 and 2 are identical except for the path. Beacon 1 has no path
set so it is not transmitted beyond the local digi. Beacons 2 and 3
have a path of WIDE2-2 so that the beacon will be digied over two hops.<br>
<br>
Beacon 3 is reporting the frequency and offset (146.875-), time,
location and range of the local voice repeater. The series of 1's
indicates that time is not set<br>
<br>
Howzat?<br>
<br>
Ray vk2tv
<div>
<div><br>
<br>
On 23/07/10 12:53, Steve Sharp wrote:
<blockquote type="cite">
<div>G'day Ray - Ok, I said I was new, so what is PHG apart
from a TLA?</div>
<div>Â </div>
<div>Steve<br>
<br>
</div>
<div class="gmail_quote">On 23 July 2010 12:45, Ray Wells <span
dir="ltr"><<a moz-do-not-send="true"
href="mailto:vk2tv at exemail.com.au" target="_blank">vk2tv at exemail.com.au</a>></span>
wrote:<br>
<blockquote
style="border-left: 1px solid rgb(204, 204, 204); margin: 0px 0px 0px 0.8ex; padding-left: 1ex;"
class="gmail_quote">
<div bgcolor="#ffffff" text="#000000">Steve,<br>
<br>
Wow! Nardi is a great site and will provide good coverage of northern
vk2.<br>
<br>
Just a suggestion, can you include PHG in your beacon for PHG circle
display?<br>
<br>
Well done.<br>
<br>
Regards, Ray
<div>
<div><br>
<br>
<br>
On 23/07/10 12:12, Steve Sharp wrote: </div>
</div>
<blockquote type="cite">
<div>
<div>
<div>I'm building up a digi for the Summerland club who
are going to place it on Mt Nardi. <a moz-do-not-send="true"
href="http://tinyurl.com/Mt-Nardi" target="_blank">http://tinyurl.com/Mt-Nardi</a></div>
<div>Â </div>
<div>Now I'm the first to put my hand up and say I'll
have a go - but sadly my skill set is a little light so I thought it
best to get some feedback from people who have more experience in this
field and hopefully get it right the first time;-)</div>
<div>Â </div>
<div>I'm using a foxdigi and seem to be getting the
desired effect and it is repeating (most) of the packets it receives
from VK4RGC-3.</div>
<div>Â </div>
<div>IÂ have configured it thus, but not sure that I have
the optimum settings yet....(obviously MYCALL and the BTEXT location
will be changed for it's installation site)</div>
<div>Â </div>
<div>ECHO ON<br>
TXDELAY 64<br>
GPS $GPGGA<br>
TRace OFF<br>
MONitor ALL<br>
DIGIpeater ON<br>
BEACON On EVERY 30<br>
UNPROTO WIDE1-1 V WIDE2-2<br>
MYCALL VK2POO-3<br>
MYALIAS WIDE2-1<br>
BTEXT !2814.23s/15330.09e#/FoxDigi Testing for SARC</div>
<div>Â </div>
<div>Any tweaks?</div>
<div>Â </div>
<div>73 Steve VK2POO<br>
  </div>
</div>
</div>
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