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<DIV><SPAN class=968063703-02042009><FONT face=Arial color=#0000ff>Yes, the 9600
baud APRS network would work just fine. It has been done in the Seattle
Area for several years as an experiment on 440.800 MHz, 223.600 and on 145.550
and it has worked very successfully! Bob King K7OFT is the one who
pioneered the 9600 baud experimentation in our area and would be a good person
to contact in helping you set up a similar 9600 baud network in your area.
Bob uses special paths on this network in order to minimize the ping-pong effect
since all those signals are retransmitted on the main network of 144.390 at 1200
baud via the internet.</FONT></SPAN></DIV>
<DIV><SPAN class=968063703-02042009><FONT face=Arial
color=#0000ff></FONT></SPAN> </DIV>
<DIV><SPAN class=968063703-02042009><FONT face=Arial color=#0000ff>Recently we
also have a second 9600 baud network in our area spearheaded by N7FSP on 440.875
and 144.350 since Scott did not agree with the special
paths.</FONT></SPAN></DIV>
<DIV><SPAN class=968063703-02042009><FONT face=Arial
color=#0000ff></FONT></SPAN> </DIV>
<DIV><SPAN class=968063703-02042009><FONT face=Arial color=#0000ff>So, yes 9600
baud APRS works well but it requires people to get together and set up a network
to make it all work well and as we all know, it is next to impossible to get
everyone to work together to accomplish a common goal .......
<P><FONT size=2>Herb, KB7UVC<BR>NW APRS Group, West Sound Coordinator<BR>Our WEB
Site: <A href="http://www.nwaprs.info/"
target=_blank>http://www.nwaprs.info</A> </FONT></P></FONT></SPAN></DIV>
<DIV><SPAN class=968063703-02042009><FONT size=2></FONT> </DIV></SPAN>
<BLOCKQUOTE
style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #0000ff 2px solid">
<DIV class=OutlookMessageHeader dir=ltr align=left><FONT face=Tahoma
size=2>-----Original Message-----<BR><B>From:</B> aprssig-bounces@tapr.org
[mailto:aprssig-bounces@tapr.org]<B>On Behalf Of </B>Wayne
Sanderson<BR><B>Sent:</B> Wednesday, April 01, 2009 7:43 PM<BR><B>To:</B>
aprssig@tapr.org<BR><B>Subject:</B> [aprssig] 9600 APRS<BR><BR></FONT></DIV>My
increasing involvement in Emergency Management in NJ has gotten me back into
APRS with a vengeance, and my Kenwood rigs are running hot. Running slow 1200
baud with random packet intervals and packet collisions seems kind of static.
The newer rigs will run 9600 APRS, but there is no 9600 network for
them.<BR><BR>We have better features built into the Kenwood radios than we
actually get to use because the network at 144.39 is still 1200, hence very
little 9600 ops- mostly satellite spotting. Since we allow these features to
languish unused or at least under used, no other radio manufacturers seem to
feel the need to incorporate them in their product lines. Now we have lost the
TH-D7s. ( I don't really believe that decision was made because of toxic
chemicals in the PCBs... Do you?)<BR><BR>How about something a bit different?
Suppose, as an experiment, here in Central NJ where there is a pretty dense
signal cluster, we were to set up a 440 UHF 9600 APRS digi at as high a point
as we can get, running as much power as we can manage. <BR><BR>Instead of
having a conventional digi, have a computer hooked to 2 radios/TNCs, one
running at 1200 on 144.39, the other at 9600 on 440 UHF. Have the computer
APRS application record all the received packets over a three minute period of
monitoring 144.39 1200 operations, compile them into one long data stream and
at the end of that 3rd minute transmit that three minute take from 144.39 1200
onto the 440 UHF band 9600 channel in one long burst. In the intervening
minutes between that digi-burst and the next, 9600 UHF APRS units can transmit
position packets, which will not be digipeated immediately but will be scooped
up by the computer and incorporated into the next data burst, and can be cross
banded to 144.39 at 1200 as well.<BR><BR>If I am correct, this will cut packet
collisions way down, and on the UHF 9600 channel the air will be clear,
allowing for greater distance RX and TX in between digi-bursts, at least until
a large number of people start running APRS at 9600 on UHF and we eventually
get QRM. And even if a large number of people eventually do run 9600 on UHF,
the capacity of the channel is as much as eight times that of 144.39 because
of the speed increase. That gives us room for more content, larger packets,
longer messages, in short- More room to play with.<BR><BR>I am not a
programmer, and so I can't make this happen by myself. All I have is some
money for equipment and the desire to see this happen. One of the talented
APRS programmers out there would have to get interested in this. Any
takers?<BR><BR><BR></BLOCKQUOTE></BODY></HTML>