[OZAPRS] Proposed digi for Mt Nardi
Ray Wells
vk2tv at exemail.com.au
Tue Aug 10 07:48:35 EST 2010
Hi Steve,
From SPLAT!, the pgrogram that produced the plots, HAAT is 2073.38 ft.
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.
Typical antennas gains are
1. dipole - probably 1dB in some direction, depending on distance from
support mast
2. 2 x dipole - 3dB
3. 4 x dipole - 6dB
4. double extended Zepp (each dipole half = 5/8) 3dB
5. 3 halfwaves in phase = 3dB
An error of 1-2dB in your "guess" will be mostly insignificant on the
radius of the resulting coverage circle.
Cheers ... Ray
--==[ SPLAT! v1.2.1 Site Analysis Report For: Nardi ]==--
---------------------------------------------------------------------------
Site location: 28.5447 South / 206.7138 West (-28? 32' 40" S / 206? 42'
49" W)
Ground elevation: 2608.27 feet AMSL
Antenna height: 300.00 feet AGL / 2908.27 feet AMSL
Antenna height above average terrain: 2073.38 feet
Average terrain at 0 degrees azimuth: 689.75 feet AMSL
Average terrain at 45 degrees azimuth: 756.54 feet AMSL
Average terrain at 90 degrees azimuth: 1060.91 feet AMSL
Average terrain at 135 degrees azimuth: 1151.16 feet AMSL
Average terrain at 180 degrees azimuth: 686.42 feet AMSL
Average terrain at 225 degrees azimuth: 585.24 feet AMSL
Average terrain at 270 degrees azimuth: 919.58 feet AMSL
Average terrain at 315 degrees azimuth: 829.48 feet AMSL
---------------------------------------------------------------------------
On 09/08/10 18:28, Steve Sharp wrote:
> 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.
> 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.
> Hopefully this'll kick interest along and we'll get some others up in
> the months to follow.....
> 73 de Steve VK2POO
> On 23 July 2010 13:36, Ray Wells <vk2tv at exemail.com.au
> <mailto:vk2tv at exemail.com.au>> wrote:
>
> Hi Steve,
>
> 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.
>
> Beacon1Text = !3056.77SS15243.92E#PHG5513/
> Kempsey, NSW
>
> Beacon2Text = !3056.77SS15243.92E#PHG5513/
> Kempsey, NSW
>
> Beacon3Text = :146.875-
> *111111z3048.00S/15255.00Er R50k
>
>
> The 5513 says
> 5 25W
> 5 antenna 320 feet above average terrain
> 1 1dB antenna gain
> 3 pattern offset towards 135 degrees.
>
> Take a look here for further explanation
>
> http://digined.pe1mew.nl/?How_to:Calculate_PHG_information
>
> The extra S after Latitude causes a green star with the letter S
> to be displayed as the digi icon.
>
> 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.
>
> 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
>
> Howzat?
>
> Ray vk2tv
>
>
> On 23/07/10 12:53, Steve Sharp wrote:
>> G'day Ray - Ok, I said I was new, so what is PHG apart from a TLA?
>> Steve
>>
>> On 23 July 2010 12:45, Ray Wells <vk2tv at exemail.com.au
>> <mailto:vk2tv at exemail.com.au>> wrote:
>>
>> Steve,
>>
>> Wow! Nardi is a great site and will provide good coverage of
>> northern vk2.
>>
>> Just a suggestion, can you include PHG in your beacon for PHG
>> circle display?
>>
>> Well done.
>>
>> Regards, Ray
>>
>>
>>
>> On 23/07/10 12:12, Steve Sharp wrote:
>>> I'm building up a digi for the Summerland club who are going
>>> to place it on Mt Nardi. http://tinyurl.com/Mt-Nardi
>>> 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;-)
>>> 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.
>>> I 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)
>>> ECHO ON
>>> TXDELAY 64
>>> GPS $GPGGA
>>> TRace OFF
>>> MONitor ALL
>>> DIGIpeater ON
>>> BEACON On EVERY 30
>>> UNPROTO WIDE1-1 V WIDE2-2
>>> MYCALL VK2POO-3
>>> MYALIAS WIDE2-1
>>> BTEXT !2814.23s/15330.09e#/FoxDigi Testing for SARC
>>> Any tweaks?
>>> 73 Steve VK2POO
>>>
>>>
>>> _______________________________________________
>>> OZAPRS mailing list
>>> OZAPRS at aprs.net.au <mailto:OZAPRS at aprs.net.au>
>>> http://lists.aprs.net.au/mailman/listinfo/ozaprs
>>
>>
>> _______________________________________________
>> OZAPRS mailing list
>> OZAPRS at aprs.net.au <mailto:OZAPRS at aprs.net.au>
>> http://lists.aprs.net.au/mailman/listinfo/ozaprs
>>
>>
>>
>> _______________________________________________
>> OZAPRS mailing list
>> OZAPRS at aprs.net.au <mailto:OZAPRS at aprs.net.au>
>> http://lists.aprs.net.au/mailman/listinfo/ozaprs
>>
>
>
> _______________________________________________
> OZAPRS mailing list
> OZAPRS at aprs.net.au <mailto:OZAPRS at aprs.net.au>
> http://lists.aprs.net.au/mailman/listinfo/ozaprs
>
>
>
> _______________________________________________
> OZAPRS mailing list
> OZAPRS at aprs.net.au
> http://lists.aprs.net.au/mailman/listinfo/ozaprs
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.aprs.net.au/pipermail/ozaprs/attachments/20100810/5912805d/attachment.htm
More information about the OZAPRS
mailing list