[OZAPRS] Are 4 x iGates in Sydney too many? (Jason Ball)

Jason Ball jason at ball.net
Fri May 23 12:26:12 EST 2014

I'll put up the antenna and plot the coverage first, we can go from there.
 If there is a hole, it can be filled, if not I'll leave well enough alone.


On Fri, May 23, 2014 at 12:20 PM, Joshua Mesilane <josh at zindello.com.au>wrote:

> This is exactly the point I was trying to make earlier.
> When it comes to enhancing the network, more IGates that can hear each
> other is NOT the resolution to black-spots. The resolution is to place
> strategically (or as strategically as you can make it) digipeaters around
> the network instead of IGate which will just re-broadcast the traffic that
> the other IGates are shoving on the APRS-IS network.
> Additional IGates should ONLY be added if there is a specific area where
> the PATH of transmissions is running out before it can reach an IGate (Eg,
> a Digipeater in the middle of nowhere that can't reach an existing IGate,
> would benefit from having an IGate within it's listening range), or if a
> packet needs to traverse more than 2 digipeaters before hitting an IGate
> then an additional IGate would benefit.
> RX Only IGates cause more problems than they solve also, as the user won't
> know that they're being heard as they'll get no response on their radio,
> and any messages that use that IGate to get on to the APRS-IS network will
> try and return via that RX Only IGate and never make it onto the RF network.
> Just throwing up an IGate "Because you can't be heard in an area" will
> cause more problems than good. Stick up a Digipeater. If you need a radio
> I'm happy to donate some FM-900s I have spare at home (How many do you
> want, I have a pile of them) programmed for 145.175 if you need them.
> ---
> 0416039082
> josh at zindello.com.au
> http://www.zindello.com.au/
> On Fri, May 23, 2014 at 12:13 PM, Ian Mills <vk2him at gmail.com> wrote:
>> It seems my original point has been mis-understood.
>> There is no question that the demise of 2US has left a number of large
>> black
>> holes - the way to fix that is to add more Digipeaters or put one in a
>> high
>> location similar to 2US.
>> My point is iGATE related only, not RF .. we have at least 4 x iGates in
>> Sydney - if you take a look at the packets they send to the internet you
>> may
>> be surprised that they all seem to be sending the same beacons to the
>> server
>> with slight TX propagation delays as the packets bounce around.
>> I'm asking because I have run the Illawarra iGate for the last 6 years and
>> I've noticed lately I may as well not bother since any
>> Wollongong/Illawarra
>> packets are sent to the server by my iGate first, but since 2AMW-1
>> rebroadcasts them every iGate in Sydney/Newcastle hears 2AMW-1 and resends
>> to the internet which makes the majority of the iGates redundant and does
>> nothing but add extra traffic to the servers.
>> The Sydney area used to have some control to ensure duplicate iGates and
>> Digipeaters were avoided - it seems to have turned into a free-for-all
>> more
>> is better approach?
>> Thanks
>> Ian vk2him
>> ----------------------------------------------------------------------
>> Message: 1
>> Date: Fri, 23 May 2014 11:53:03 +1000
>> From: Jason Ball <jason at ball.net>
>> To: Joshua Mesilane <josh at zindello.com.au>
>> Cc: Australian APRS Users <ozaprs at aprs.net.au>
>> Subject: Re: [OZAPRS] Are 4 x iGates in Sydney too many?
>> Message-ID:
>>         <CAOGCNM5pQcxuDKkX1+qVaEcBsZ=dzjUL2J+=
>> KFExwAPFw5+s+A at mail.gmail.com>
>> Content-Type: text/plain; charset="utf-8"
>> 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/
>> >
>> *************************************
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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
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