[OZAPRS] Proposed digi for Mt Nardi
Steve Sharp
sharpst at gmail.com
Wed Aug 11 17:17:15 EST 2010
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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>>>>>
>>>>>
>>>>>
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>>>>>
>>>>
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