[OZAPRS] RGI/RBM/Griffith digis

Glen English VK1XX glenlist at pacificmedia.com.au
Thu Nov 2 12:39:02 AEDT 2017


9600 mobile with no decent FEC , and heaps of LONG delay (>20uS)
multipath ????

it would go like a bucket of sh1t.. so purely for fixed stations.

of course can keep on adding channels to the dire wolf box...

-glen
On 2/11/2017 11:46 AM, Matthew Cook wrote:
> I'm thinking as a higher speed secondary service that users and fixed
> stations can listen too.
>
> I've got no idea how well UHF 9600 baud would work in a mobile
> environment with picket fencing or flutter...   
>
> Just using left over bits in the shack from the good-ol packet days..
> and a rPi of course.
>
> 73
>
> Matthew
> VK5ZM
>
> On 2 November 2017 at 10:33, Glen English VK1XX
> <glenlist at pacificmedia.com.au <mailto:glenlist at pacificmedia.com.au>>
> wrote:
>
>     and UHF would be easier, run 100W or something. so u are thinking as a
>     distribution backbne, rather than users listening to it ?
>
>
>     On 2/11/2017 10:56 AM, Matthew Cook wrote:
>     > If you've got the ability why not go 9600 baud on 70cm for a APRS-IS
>     > -> RF gateway.  There is a channel already in the band plan for such
>     > activities, nothing says it has to be 1200 baud.  There are
>     plenty of
>     > radios out there now that can do 9600 baud, direwolf would eat
>     it for
>     > breakfast.
>     >
>     > That has been something in the back of my mind to get installed here
>     > in Adelaide for a trial at some point.
>     >
>     > 73
>     >
>     > Matthew
>     > VK5ZM
>     >
>     > On 2 November 2017 at 09:12, 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:
>     >
>     >     Josh, I think the RF message forwarding could be done. That
>     would
>     >     provide a reasonable utility for the region.
>     >
>     >     Yeah will seek to add another transceiver channel up there,
>     which is
>     >     actually non trivial but on the list. Maybe 7575, UHF or 6m
>     dunno.
>     >
>     >     Make the most of the super site.
>     >
>     >     g
>     >
>     >
>     >     On 1/11/2017 5:42 PM, Josh wrote:
>     >     > I can't see a good reason to put an igate there, unless
>     you were
>     >     > thinking of dropping the digipeater function altogether.
>     >     > There's multiple igates with reliable and fast internet
>     links within
>     >     > RGI's footprint, so leave it to them rather than wasting your
>     >     limited
>     >     > bandwidth.
>     >     >
>     >     > But if you have the link available, setting up APRS-IS->RF
>     message
>     >     > forwarding could be a great service addition considering the
>     >     range and
>     >     > general area that RGI covers.
>     >     > Bandwidth requirements would be extremely low too.
>     >     >
>     >     > - Josh VK2HFF
>     >     >
>     >     > On 1/11/2017 4:43 PM, Glen English VK1XX wrote:
>     >     >
>     >     >> The Ginini  IP access, at least in the short term is a low
>     >     bandwidth ~
>     >     >> half duplex 50 kbps UHF IP bridge. good for SSH, remote
>     control of
>     >     >> things. How many bytes (UDP payload) is the IGATE "upload"
>     >     >>
>     >     >> ?
>     >     >>
>     >     >> given the APRS UI "pollution" of 5175 , we'll probably
>     put a second
>     >     >> channel on the direwolf and run different freq for connected
>     >     mode stuff
>     >     >> for WICEN...
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