[OZAPRS] Are 4 x iGates in Sydney too many?

Fri May 23 12:04:40 EST 2014

Once I've set it up we can audit the coverage and enable digi peating if
people want.   I was only planning on a receiver setup at this stage as I
don't have a spare radio to dedicate to this.

Cheers
J.

On Fri, May 23, 2014 at 11:56 AM, Joshua Mesilane <josh at zindello.com.au>wrote:

> You're assuming the only purpose of APRS is to get into the APRS-IS
> network. What about messaging, or the other people that might be *just* out
> of hearing range of the other station. Depending on how the IGate are
> configured they may re-broadcast the packet that you're putting onto the
> APRS-IS network anyway, so a digi really adds no additional RF traffic,
> while enhancing the other features of APRS.
>
> If you're running the IGate in receive only, you also run the risk of
> breaking messaging.
>
>
> ---
> VK3XJM
> 0416039082
> josh at zindello.com.au
> http://www.zindello.com.au/
>
>
> On Fri, May 23, 2014 at 11:53 AM, Jason Ball <jason at ball.net> wrote:
>
>> Why run a digi and consume more of the bandwidth when an igate would
>> suffice ?
>>
>>
>>
>>
>> On Fri, May 23, 2014 at 11:46 AM, Joshua Mesilane <josh at zindello.com.au>wrote:
>>
>>> Rather than putting up another IGate, wouldn't it make more sense to run
>>> a fill-in digi. Are you within hearing range of another IGate, if you are
>>> you'd probably be better off running a Digi
>>>
>>>
>>> ---
>>> VK3XJM
>>> 0416039082
>>> josh at zindello.com.au
>>> http://www.zindello.com.au/
>>>
>>>
>>> On Fri, May 23, 2014 at 11:44 AM, Jason Ball <jason at ball.net> wrote:
>>>
>>>> There are a lot of holes left around Sydney with the loss of vk2us,
>>>> lots of black spots as it's a reasonably hilly place.    I'm planning on
>>>> recommissioning my igate once I put up another dual band antenna for it as
>>>> I find I can catch quiet a few stations that are missed by the other gates
>>>> aa I have a little more elevation to work with.
>>>>
>>>> Its been a while since I've checked but the 2m frequency wasn't all
>>>> _that_ congested.   There is some activity that may result in a new CBD
>>>> based digipeater, but I won't go in to details until this has progressed
>>>> beyond the hopeful planning stage.
>>>>
>>>> I don't see the amount of aprs traffic in sydney posing any particular
>>>> problem for the servers, its not _that_ busy. (or at least... it wasn't...)
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>> On Fri, May 23, 2014 at 11:36 AM, <vk2ycj at bravo.net.au> wrote:
>>>>
>>>>> Dave,
>>>>>
>>>>> Can you explain something to me ?
>>>>>
>>>>> I assume that in a heavily populated area there can be one or two
>>>>> iGates
>>>>> for Internet connectivity and as many digipeaters as you can muster -
>>>>> to
>>>>> help get better and better coverage to the whole area and the
>>>>> blackspots.
>>>>>
>>>>> If all of this is done on 145.175 MHz then things can get congested
>>>>> pretty
>>>>> quickly with heavy traffic - and packets will be lost.
>>>>>
>>>>> Are there any working examples where people have put in dual frequency
>>>>> digipeaters - where the primary frequency is 145.175 MHz and an extra
>>>>> 70cm
>>>>> frequency is used as the dedicated link to the nearest iGate ?
>>>>>
>>>>> Would such a system help with congestion and reduce the loss of
>>>>> packets ?
>>>>>
>>>>> My APRS kit came from the Oxley Region Amateur Radio Club and is a
>>>>> little
>>>>> beauty.  It uses a UV-5R handheld radio as the RF device which works
>>>>> pretty well with a decent antenna on the roof of the car - but at only
>>>>> 2
>>>>> watts output it just cannot compete with other stations running 30-50
>>>>> watts so in busy times my signal doesn't get through and gets squashed.
>>>>>
>>>>> Assuming the nearest digipeater hears my signal is there any guarantee
>>>>> that the data gets through from that digipeater to the iGate ?  So do
>>>>> digipeaters and iGates have a special relationship to get the data
>>>>> through
>>>>> at any cost ?
>>>>>
>>>>> And another question relating to Newcastle.   Our main digipeater is
>>>>> up on
>>>>> the Sugarloaf Range and the nearest iGate is on a large building in
>>>>> Hunter
>>>>> Street West - in the Newcastle CBD.  If I'm driving around Newcastle
>>>>> City
>>>>> do my APRS packets have to go via the Sugarloaf digipeater and then to
>>>>> the
>>>>> igate - or if I am close to the iGate will it accept my packets ?
>>>>>
>>>>>
>>>>> Very interesting stuff, thanks, Jamie VK2YCJ
>>>>>
>>>>>
>>>>>
>>>>> > Unfortuately there is no longer a digi in a good coverage area.
>>>>> ARNSW are
>>>>> > consideringthe possibility  puting one a Dural, but not until the
>>>>>  current
>>>>> > tower is replaced , which may be 12 - 18 months.
>>>>> >
>>>>> > It would be good to get one back on  the top of a CBD / North Sydney
>>>>> /
>>>>> > Chatswood  building for coverage.
>>>>> >
>>>>> > Dave vk2jdh
>>>>> > Date: Thu, 22 May 2014 21:47:13 +1000
>>>>> > From: vk2him at gmail.com
>>>>> > To: ozaprs at aprs.net.au
>>>>> > Subject: [OZAPRS] Are 4 x iGates in Sydney too many?
>>>>> >
>>>>> >
>>>>> >
>>>>> > I've noticed we now have at least 4 x iGates
>>>>> >  in Sydney, I would have thought that's too many and may be adding
>>>>> extra
>>>>> >  loads on the sever as they all gate the same traffic?
>>>>> >
>>>>> > Ian vk2him
>>>>> >
>>>>> >
>>>>> >
>>>>> >
>>>>> > _______________________________________________
>>>>> > OZAPRS mailing list
>>>>> > 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
>>>>> >
>>>>>
>>>>>
>>>>> _______________________________________________
>>>>> OZAPRS mailing list
>>>>> OZAPRS at aprs.net.au
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>>>>>
>>>>
>>>>
>>>>
>>>> --
>>>> --
>>>> Teach your kids Science, or somebody else will :/
>>>>
>>>> jason at ball.net
>>>> vk2vjb at google.com <vk2flnx at google.com>
>>>> callsign: vk2vjb
>>>>
>>>>
>>>> _______________________________________________
>>>> OZAPRS mailing list
>>>> OZAPRS at aprs.net.au
>>>> http://lists.aprs.net.au/mailman/listinfo/ozaprs
>>>>
>>>>
>>>
>>
>>
>> --
>> --
>> Teach your kids Science, or somebody else will :/
>>
>> jason at ball.net
>> vk2vjb at google.com <vk2flnx at google.com>
>> callsign: vk2vjb
>>
>>
>

-- 
--
Teach your kids Science, or somebody else will :/

jason at ball.net
vk2vjb at google.com <vk2flnx at google.com>
callsign: vk2vjb
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