[OZAPRS] HF APRS site

[Tony Hunt]

Hi Paul,

Ideally 30m is what you want to cover. Most HF APRS activity is on 30m . 
Some of us have played about on 40 and 20m with mixed results. Although some 
have done ok using DSP TNCs for receiving.
I tend to feel that you can put a lot of effort in setting up for 40 or 20m 
and get little usage through it.

As you said noise thresholds are critical. I would have thought that the 
WaterTower would have started to have issues on HF with this considering all 
the gear up there now. My house used to be good for HF APRS but Ive been 
invaded by next door neighbours and suburban development to the point that 
30m isnt real quiet any longer. I used to run a HF Gate here but Ive found 
now that other operators are doing a better job than me probably due to 
lower noise floors in rural areas.

As far as Gating it goes. Ideally Gating it direct onto the Internet is far 
more desirable. You could use a Raspberry Pi or something to get it into the 
Internet feed with APRX or similar.

Thats my take on that

Tony  Hunt  VK5AH

----- Original Message ----- 

> Date: Thu, 20 Feb 2014 14:33:56 +1030
> From: Paul Mullins <pmullins at adam.com.au>
> To: ozaprs at aprs.net.au
> Subject: [OZAPRS] HF APRS site
> Message-ID: <53057EAC.2060406 at adam.com.au>
> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>
> Hello all,
> it has been a while for me to post anything useful but, currently we
> have a fill-in digi-peater in South Australia in Elizabeth, this is
> hosted by E.A.R.C ( Elizabeth Amateur Radio Club) of which I built and
> installed many years ago, this one is on VHF, I have been asked if I
> have thought about building a HF setup, this radio and modem wise is
> easy I have spares.
>
> Now with keeping it simple, we have been donated a surplus of old
> codans, of which I have electronic manuals and about 3 -4 MFJ-1270B
> modems left over, every buy and sell I buy them!
>
> I was thinking of setting up in the water tower at the clubs local site
> elevation is great, I have not done a site inspection for noise but that
> will happen.
> I am thinking of setting up on one or two of these bands 40 m (7036 LSB)
> or 20 m (14109 LSB).
>
> Now with the site if working is it a known correct way to treat the
> packets to fed them back onto the VHF network or send if back to the
> 'internet' via other means, this is the 'bit' I am asking for the dumb
> question, I want to set this up correctly and not upset anybody.
>
> The reason why 40m and 20m is that people with out advanced licensing
> can in fact get the packets in, currently I am one of these people with
> a standard license.
>
> I look forward to any ideas or comments.
>
> Cheers and 73s'
>
> Paul
>
> VK5VCO