[OZAPRS] RE: [zlaprs] Liaison with VK.

[Richard Hoskin]

Hi Noel,

Your email wasn't ignored.... Just discussed via 600ohms, rather than on
the list. The discussion has been along the lines of Yes it would be
good to set up a 30mtr APRS Net with the ZLs even if they do just happen
to win the world cup :)

It appears that we are going to use the International APRS 30mtr
Frequency.
It is proposed that VK have 4 30mtr IGates located at Melbourne,
Mildura, Perth and Brisbane. We will continue to use the path of
GATE,WIDE for HF as this is the accepted international standard to Gate
from HF to VHF. I don't believe we will be setting up any ECHO stations.

The biggest issue at present is the frequency synchronization of all
Base stations on the network to a single reference frequency. HF Packet
is very intolerant of drifts of more that about 30Hz. In a mobile
situation this can be difficult to achieve.

Once the 30mtrs network is set up we will look at a 40mtr network for
'local' coverage.

If we work together on these networks it will assist and benefit all of
us.

See http://vk6.aprs.net.au/hf.htm for some current details.
Chris Hill VK6KCH is the main driver behind the VK HF Network.

I think the OZAPRS list is underutilized.

Cheers
Richard
VK3JFK


-----Original Message-----
From: zlaprs-owner at mail.nzart.org.nz
[mailto:zlaprs-owner at mail.nzart.org.nz] On Behalf Of Noel Rowe
Sent: Thursday, 16 October 2003 11:33 AM
To: zlaprs at mail.nzart.org.nz
Subject: [zlaprs] Liaison with VK.

Fellow ZL's,

As I said I would, I posted to the VK APRS group a message suggesting a
joint approach to setting up an HF APRS network.  The replies number
zero.
I was totally ignored.

To prove that I never offended them by mentioning their expected loss of
the
world rugby cup, I post herewith the message that I sent:-

Hi to those on this group,

Over here in ZL we are at present debating the merits of setting up some
receiving stations so that mobile APRS users can use HF transmitters.
Of
course the question of what band(s) to use gets tossed about.

There is a good opportunity here to coordinate the establishment of
several
VK and ZL receiving stations so that propagation at any given time will
be
of less importance.  Then there would be no need to worry that the
mobile in
say the ZL Nth Island would not be heard locally, if it was being heard
in
say Melbourne or Perth, as long as it was being fed into an i-gate -
somewhere!

Our ZL network is setup at least in my area (ZL1, ignore my callsign!)
so
that any ZL call heard anywhere there is an i-gate will be fed out to
VHF on
a local frequency, so where the HF signal is received is not an issue.

And we are talking here strictly of HF to be digi'd to VHF, absolutely
not
VHF out to HF.

I myself am an advocate of using 30 metres, an under utilised band here
as
our band plan prohibits us using it on SSB for voice, but data is OK.
However I am willing to listen to arguements for or against.  But I dont
think that 40 metres is a good choice - in my opinion it is better to
site
receiving stations to make use of propagation rather than say change
bands
while mobile to suit the propagation at the time, trying to reach a
fixed
location.

By utilising our i-gate servers, in conjunction with HF and VHF, ET
doesnt
need to phone home by the most direct path!

Cheers all,
Noel, ZL3GR.


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