[OZAPRS] Proposed digi for Mt Nardi

Wed Aug 11 18:19:32 EST 2010

Yeah.... Isn't -1 used for fill in digi's?

Cheers, Dick.
VK7DIK.

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-------Original Message-------

From: Gordon Taylor
Date: 8/11/2010 5:46:43 PM
To: 'Australian APRS Users'
Subject: Re: [OZAPRS] Proposed digi for Mt Nardi

Steve,
                I would use -3 as thats what most up here use

Regards,
Gordo VK4VP

From: ozaprs-bounces at aprs.net.au [mailto:ozaprs-bounces at aprs.net.au] On
Behalf Of Steve Sharp
Sent: Wednesday, 11 August 2010 17:17
To: Australian APRS Users
Subject: Re: [OZAPRS] Proposed digi for Mt Nardi

That's what I thought - but when I looked up the aprs.net.au site
http://aprs.net.au/general/standard-ssids it gives -1 "Digipeater, or Home
Station running a Fill-In Digi" and -3 as "Digipeater".

Not quite enough info for me to differentiate;-)

Steve 2poo (not really Shakespeare is it?;-)
On 11 August 2010 16:41, Ray Wells <vk2tv at exemail.com.au> wrote:
Steve,

SSID -1 is generally used for digi's

Ray vk2tv 

On 11/08/10 12:20, Steve Sharp wrote: 
G'day Ray - all looking good, one final question should the SSID be VK2RPL-1
or -3?

I'm leaning towards -1, but am happy to be corrected before it is written in
and sent on it's way;-)

Steve VK2POO
On 10 August 2010 13:59, Ray Wells <vk2tv at exemail.com.au> wrote:
Steve,

83m is 272 ft, close enough to the 300 I guessed.

800m is a tad higher than what SPLAT! (and Google earth) thinks it is but
still close enough, especially given the step sizes available for HAAT and
Power.

HAAT - Height Above Average Terrain

Pick 0dB gain and the nearest height and you won't be too far off. It's only
a guide.

Ray vk2tv 

On 10/08/10 09:27, Steve Sharp wrote: 
The tech got back to me with the following:

"Antenna Gain is going to be 3db to start with but then unity when we get
around to putting the 2m repeater up there ,  HAAT not 
sure what it means but antenna hight is 83m above ground or 883m above sea
level"

Sound about right?

Steve VK2POO
On 10 August 2010 07:48, Ray Wells <vk2tv at exemail.com.au> wrote:
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> 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> 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

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