[aprssig] Interesting Findings - 300 Baud AX.25 on VHF-FM APRS

Bill wa7nwp at gmail.com
Sun Apr 3 12:23:32 EDT 2016

I don't think we'd go wrong with either DireWolf or Uz7ho.  There seems to be a bit of feature competition between the two and that's great for we users.  

Here's a nice comparison:


The added APRS and touch tone features in DireWolf are intriguing.  Sometimes I think it's too much, then I think how cool they are.


> On Apr 3, 2016, at 1:43 AM, John Wiseman <john.wiseman at cantab.net> wrote:
> Unfortunately DireWolf doesn't implement the UZ7HO FEC mode.
> I did start trying to implement his FEC mode in C so it could run on a PI or
> one of the modern cheap but powerful embedded devices (eg the Nucleo
> F446RE), but didn't get very far. I haven't given up, but other projects are
> getting in the way!
> 73,
> John G8BPQ
> -----Original Message-----
> From: aprssig [mailto:aprssig-bounces at tapr.org] On Behalf Of Bill via
> aprssig
> Sent: 03 April 2016 06:12
> To: Stephen H. Smith; aprssig at tapr.org
> Subject: Re: [aprssig] Interesting Findings - 300 Baud AX.25 on VHF-FM APRS
> Use a RPI with DireWolf software and a 5$ USB sound fob.  No waterfall but
> otherwise equivalent.   I've heard uz7ho runs on Linux under WINE but that
> would probably require an Intel CPU.
> With these options available now, it's interesting to consider just which
> alternate modes we should try.   
> Bill, WA7NWP
>>> On Apr 2, 2016, at 6:27 PM, Stephen H. Smith <wa8lmf2 at aol.com> wrote:
>>> On 4/2/2016 6:15 PM, Bill Vodall wrote:
>>> On Sat, Apr 2, 2016 at 2:22 PM, Stephen H. Smith via aprssig
>>> <aprssig at tapr.org> wrote:
>>>> What I could really use is a tiny single board computer ala Raspberry Pi
>>>> that can run normal Intel x86 OSes and software. There are tools that
> can
>>>> remove a lot of the fluff from Windows 2000 or XP so that the barebones
> OS
>>>> kernel and an application can fit into less than 400 MB of flash.   With
>>>> such a setup, it would be trivial to use the UZ7HO Soundmodem advanced
> modes
>>>> in a dedicated tracker.
>>> Won't one of the $70 win tablets work for this?
>> That's what I am using now.  The cheap tablets are wonderful building
> blocks that let you use off-the-shelf standard Windows apps, but I was
> thinking of something even smaller and lower power.
>> As I said, something akin to a Ras Pi.     For tracker, digipeater, igate
> applications, etc the device doesn't need a display once it's setup.
> Without a display, the power consumption and physical size could easily be
> cut in half.
>> _________________________________________________
>> Stephen H. Smith    wa8lmf (at) aol.com
>> Skype:        WA8LMF
>> EchoLink:  Node #  14400  [Think bottom of the 2-meter band]
>> Home Page:          http://wa8lmf.net
>> _______ Windows 10 Outrages! _______
>>  <http://WA8LMF.net/Windows10_Info>
>> Live Off-The-Air APRS Activity Maps
>>  <http://wa8lmf.net/map>
>> Long-Range APRS on 30 Meters HF
>>  <http://wa8lmf.net/aprs/HF_APRS_Notes.htm>
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