[OZAPRS] HF APRS

[David and Justine Olsen]

Robert

I agree a 20m HF gate in NZ would be good and would somewhat fill the  
hole, though again I've run predictions for remote areas of VK to ZL  
and find sigs of S5 or less, compared to higher signal strengths  
predicted for 40m within VK using VK gates. The answer is for sure  
more gates on as many frequencies as possible, so maybe we need to  
help our fellow amateurs get involved more in HF APRS.

Jack's successes yesterday and the number of stations I've copied  
over the last few days and nights makes me feel positive about 40m  
APRS here in VK. It seems weak signals, phase distortion and whatever  
aside, 40m HF APRS for position reporting for remote travelers in VK,  
who don't have access to 30m is a reliable option as long as you  
don't want minute by minute reporting. This is exactly what I had  
hoped for.

I would love to see a 20m gate in NZ to give another option, and I  
would love to see a number of igates on 40m, in addition to those on  
30m and 20m already.

Many thanks to those who have helped with the testing. I am happy to  
leave my igate running on 40m 24/7 now until I leave to go touring  
the deserts. I hope to have Tx ability today so I can beacon on 40m.

David
VK4MDX



I think it is logical that we use each others gates

On 30 Mar 2009, at 07:21, Robert Thirkettle wrote:

> Hi David if we have a ZL 20M HF Gateway that hole is filled in. In  
> ZL we
> have a propagation issue if 40M is unworkable that is what we have at
> present then no ZL HF solution will work that's why we then only  
> have a
> via VK option.
>
> I used mobile 40M APRS in 2001 for a trip around the lower south  
> Island
> it worked well for paths over 200Km but that time was much closer  
> to the
> top of the sun spot cycle than now yesterday Gareth was struggling to
> make a 600Km path work.
>
> If VK and ZL want to make use of each others HF gateways then we  
> need to
> use a frequency that works 7MHz only works at dawn and dusk 10MHz also
> only works for 1 or 2 more hours than 7MHz but 14MHz will work for  
> most
> of the daylight hours as well as giving a east coast VK to west  
> coast VK
> path.
>
> I also do agree that a mix of 40M 30M and 20M gate ways will give the
> greatest coverage.
>
> I am working tonight to get my gateway up and going again.
>
> Regards Rob Thirkettle ZL3RX
> Dept  Physics & Astronomy
> University of Canterbury
> Private Bag 4800,
> Christchurch 8020,
> New Zealand
> Tel: +64 3 364 2510
> Fax: +64 3 364 2469
> mailto:rob.thirkettle at canterbury.ac.nz
>
>
> -----Original Message-----
> From: ozaprs-bounces at aprs.net.au [mailto:ozaprs- 
> bounces at aprs.net.au] On
> Behalf Of David and Justine Olsen
> Sent: Sunday, 29 March 2009 12:27 p.m.
> To: Australian APRS Users
> Subject: [OZAPRS] Frequencies for Peoppel Corner and Central Australia
>
> Ray is correct. My push or 40m (not just for me) is because standard
> calls can't use 30m. 30m is ideal for the desert trips, but
> unfortunately I and other standard calls can't use it.
>
> What I am suggesting is that my observations and predictions show 20m
> though better for data, does not provide coverage. The skip (dead)
> zone covers most of Australia at most times of day from Central
> Australia.
>
> Therefore what I am advocating is more igates on 40m because it
> provides a logical second choice to 30m, 20m being my third choice
> for the reasons metioned above.
>
> More igates on more frequencies though is the ideal in my view.
>
> David
> VK4MDX
>
>
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