[aprssig] Airborne Digis

[Stephen H. Smith]

Bob Poortinga wrote:
> Stephen H. Smith <wa8lmf2 at aol.com> writes:
>
>   
>> Remember, the home digis are primarily using "dumb" non-APRS-aware classic
>> clunker hand-me-down TNCs (like PK-232s and TNC2 clones like MFJ-127x) that
>> blindly respond to the fixed alias WIDE1-1 and *DON'T DO *dupe checking.
>>  (Dupe checking is an APRS-specific feature only present in KPC3s and the
>> new-generation APRS-centric TNCs like Tracker2s, TT4s, TNC-X, etc. or in
>> TNCs under  control of KISS-mode APRS software like UIview.)
>>     
>
> You may be forgetting that the UIDIGI firmware for TNC2/MFH-127x TNCs
> does indeed perform dupe-checking.
> <http://www.qsl.net/n8deu/uidigi_eprom_settings.htm#DuplicateSuppression>.
>
> I'm running a fill-in digi using an MFJ-1270B with UIDIGI at this moment.
>
> Anyone with direct access to APRS-IS data, care to tell us how many
> APNUxx digis are currently on-line?
>
> 73 de
>   

There are a lot of UI-DIGI TNCs doing duty as big-gun mountain-top true 
WIDEn-Ns.   I would be surprised if there were very many doing home 
fill-in duty. 

The home fill-ins seem mostly to be hand-me-down hamfest specials that 
can't be modified with APRS-centric firmware like PK-232s, PacComs, 
etc.     [Part of the logic of my inventing the WIDE1-1 fill-in 
expedient (and the WIDE1-1,WIDE2-1 path construct rather than just 
WIDE2-2) several years ago was being able to recycle non-APRS-aware   
non-update-able   clunkers for first-hop home duty, by just setting 
MYALIAS to "WIDE1-1 .]


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