[OZAPRS] new modem

[Glen English VK1XX]

David, I have replied to you off list.

My guess is the new mode is somewhere between 15 and 20dB better than 
300 baud HF packet.

cheers




On 3/02/2018 8:27 PM, David Giddy wrote:
> Glenn,
>
> OK, thanks. Happy to wait. I'm pleased you are helping move APRS into 
> the 21st century - I think the approach you are taking has lots of 
> interesting possibilities down the track.
>
> Glenn VK3YY and I were discussing this week as we hiked to The Viking 
> the potential for such an approach to enable a light weight back-pack 
> portable HF tracker which would be of great use to us SOTA activators 
> when we get out into the mountains where VHF coverage is very limited.
>
> As you noted, the encoder has very limited computing requirement and 
> building a small 30m transmitter as a plug on to a RPi Zero putting 
> out a couple of watts seems quite achievable. Couple that with heavily 
> loaded 30m tape measure whip antenna would hopefully work. EIRP will 
> be very low, but with a reasonable spread of gateways, may actually 
> prove usable. I've been quite impressed with the ability of 30m 300 
> baud to be heard from deep within mountain valleys (see may spots over 
> the last few days when Glenn and I were in the Alpine National Park).
>
> 73
>
> David
> VK3IL
>
> On Sat, Feb 3, 2018 at 7:56 PM, Glen English VK1XX 
> <glenlist at pacificmedia.com.au <mailto:glenlist at pacificmedia.com.au>> 
> wrote:
>
>     Hi David
>
>     No integration with dire wolf right now. But close.
>
>     I will have a gateway set up here next week on two bands, 80 and 30.
>
>     it will be in the same freq segments as the 300 baud packet
>
>     I have ordered some more ODroids to deploy onto a couple of
>     amateur's properties with HF radios  for gateways, will be on some
>     time this month I expect.
>
>     In the meantime I will let the system mature just a little more
>     before adding you into the beta program
>     73
>     g
>
>
>
>
>
>     On 3/02/2018 4:25 PM, David Giddy wrote:
>
>         Hi Glenn,
>
>         I'd be interested to give it a try on my RPi3 in the car. Does
>         it currently integrate with Direwolf, or is it stand alone (I
>         haven't followed all the development emails) ?
>         Are you going to run a gateway to test it against? If so, what
>         frequency?
>
>         73
>
>         David
>         VK3IL
>
>         On Fri, Feb 2, 2018 at 8:57 PM, Glen English VK1XX
>         <glenlist at pacificmedia.com.au
>         <mailto:glenlist at pacificmedia.com.au>
>         <mailto:glenlist at pacificmedia.com.au
>         <mailto:glenlist at pacificmedia.com.au>>> wrote:
>
>             new modem....
>
>             I have a built package now for the modem, that does all the
>             prerequistite installs, fiddles to the groups, permissions,
>             rtprio, packages etc, full install , confs and test
>         programs in
>             makefile....
>
>             Who else wants a go with it ? I will accept a couple more.
>
>             linux Debian or derivative , Alsa  required. some ability with
>             Linux required obviously.
>
>             PC x86  (32 bit)  or ARMv7(32) ARMv8 (64) platforms
>
>             might work on AMD64 . works on ARM64 so.....
>
>
>
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>
>
>
>         -- 
>
>         73
>
>         David
>         VK3IL
>
>
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>
> -- 
>
> 73
>
> David
> VK3IL
>
>
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