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<DIV><FONT face=Calibri>Lynn,</FONT></DIV>
<DIV><FONT face=Calibri>Repeating is repeating either simples or
duel.</FONT></DIV>
<DIV><FONT face=Calibri>The FCC, stated clearly states this.</FONT></DIV>
<DIV style="FONT: 10pt Tahoma">
<DIV><FONT size=3 face=Calibri>The only unit's that are repeaters and in mobile
mode are as example mini repeaters in police cars, like the state police used
when they enter a facility and in remote areas.</FONT></DIV>
<DIV>Theses<FONT size=3 face=Calibri> units were made by Midland and some other
companies. But they were registered.</FONT></DIV>
<DIV><FONT size=3 face=Calibri>John W3ATE-8</FONT></DIV><FONT size=3
face=Calibri></FONT></DIV>
<DIV style="FONT: 10pt Tahoma">
<DIV><BR></DIV>
<DIV style="BACKGROUND: #f5f5f5">
<DIV style="font-color: black"><B>From:</B> <A title=dnchls@gmail.com
href="mailto:dnchls@gmail.com">David Nichols</A> </DIV>
<DIV><B>Sent:</B> Monday, September 19, 2011 10:32 PM</DIV>
<DIV><B>To:</B> <A title=aprssig@tapr.org href="mailto:aprssig@tapr.org">'TAPR
APRS Mailing List'</A> </DIV>
<DIV><B>Subject:</B> Re: [aprssig] Mobile Digipeating</DIV></DIV></DIV>
<DIV><BR></DIV>
<DIV class=WordSection1>
<P class=MsoNormal><SPAN
style="FONT-FAMILY: 'Calibri','sans-serif'; COLOR: #1f497d; FONT-SIZE: 11pt">All
of this brings up another issue. From the little I’ve been able to gather about
mobile digipeating, and I agree with the statement below ( I believe temporary
re-locatable is a better term), it is for temporary emergency use. If this is
correct, what constitutes “emergency”. Could I justify using it as described for
practice purposes? I practice, on the average, twice a week, for 1-2 hours. I
would hate for my next posting to you folks to be from Leavenworth after my
first digipeating session </SPAN><SPAN
style="FONT-FAMILY: Wingdings; COLOR: #1f497d; FONT-SIZE: 11pt">J</SPAN><SPAN
style="FONT-FAMILY: 'Calibri','sans-serif'; COLOR: #1f497d; FONT-SIZE: 11pt">.
Or for that matter, would I be getting nasty-grams from the APRS community?
Otherwise, I think this might fit my needs. I could also use it on actual
searches, especially if I drive a ways from Incident Base to the subject’s place
last seen, which has been the case several times.<o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-FAMILY: 'Calibri','sans-serif'; COLOR: #1f497d; FONT-SIZE: 11pt"><o:p> </o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-FAMILY: 'Calibri','sans-serif'; COLOR: #1f497d; FONT-SIZE: 11pt">dave<o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-FAMILY: 'Calibri','sans-serif'; COLOR: #1f497d; FONT-SIZE: 11pt">N5FMA<o:p></o:p></SPAN></P>
<DIV
style="BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: #b5c4df 1pt solid; BORDER-RIGHT: medium none; PADDING-TOP: 3pt">
<P class=MsoNormal><B><SPAN
style="FONT-FAMILY: 'Tahoma','sans-serif'; FONT-SIZE: 10pt">From:</SPAN></B><SPAN
style="FONT-FAMILY: 'Tahoma','sans-serif'; FONT-SIZE: 10pt">
aprssig-bounces@tapr.org [mailto:aprssig-bounces@tapr.org] <B>On Behalf Of
</B>Jim Alles<BR><B>Sent:</B> Saturday, September 17, 2011 9:52 AM<BR><B>To:</B>
TAPR APRS Mailing List<BR><B>Subject:</B> Re: [aprssig] Mobile
Digipeating<o:p></o:p></SPAN></P></DIV>
<P class=MsoNormal><o:p> </o:p></P>
<DIV>
<P class=MsoNormal>Besides, we really aren't talking about mobile
digipeating. That is not recommended for APRS, either.
<o:p></o:p></P></DIV>
<DIV>
<P class=MsoNormal> <o:p></o:p></P></DIV>
<DIV>
<P class=MsoNormal>I would call it a re-locatable digipeater, others might use
the term portable. It is temporary, fixed use.<o:p></o:p></P></DIV>
<DIV>
<P class=MsoNormal>Peace,<o:p></o:p></P></DIV>
<DIV>
<P class=MsoNormal> <o:p></o:p></P></DIV>
<DIV>
<P class=MsoNormal>Jim A. KB3TBX<o:p></o:p></P></DIV>
<DIV>
<P class=MsoNormal>On Sat, Sep 17, 2011 at 8:53 AM, Lynn W. Deffenbaugh (Mr)
<<A href="mailto:ldeffenb@homeside.to">ldeffenb@homeside.to</A>>
wrote:<o:p></o:p></P>
<P class=MsoNormal>A digipeater is not a dual-frequency repeater, but a receive
and re-transmit on a single frequency. There is no pre-registration
required in the United States that I'm aware of.<BR><BR>Lynn (D) - KJ4ERJ -
Author of APRSISCE for Windows Mobile and Win32 <o:p></o:p></P>
<DIV>
<DIV>
<P class=MsoNormal><BR><BR>On 9/17/2011 8:32 AM, Dr. John wrote:<o:p></o:p></P>
<P style="MARGIN-BOTTOM: 12pt" class=MsoNormal>Mobile repeaters in the amateur
environment is not authorized. As repeaters need to be registered at a fixed
position<BR><BR>Dr. John Gregory
/W3ATE-8<BR><BR>--------------------------------------------------<BR>From: "Tom
Russo" <<A href="mailto:russo@bogodyn.org"
target=_blank>russo@bogodyn.org</A>><BR>Sent: Saturday, September 17, 2011
1:02 AM<BR>To: "TAPR APRS Mailing List" <<A href="mailto:aprssig@tapr.org"
target=_blank>aprssig@tapr.org</A>><BR>Subject: Re: [aprssig] Mobile
Digipeating<o:p></o:p></P>
<P class=MsoNormal>On Fri, Sep 16, 2011 at 10:34:30PM -0600, we recorded a
bogon-computron collision of the <<A href="mailto:dnchls@gmail.com"
target=_blank>dnchls@gmail.com</A>> flavor, containing:<o:p></o:p></P>
<P class=MsoNormal>I am in search and rescue and use APRS so others can keep
track of me.<o:p></o:p></P>
<P style="MARGIN-BOTTOM: 12pt" class=MsoNormal><BR>You're in good
company.<o:p></o:p></P>
<P class=MsoNormal>I<BR>live in New Mexico where we have many digipeaters on
mountain tops, but we<BR>still have many dead zones.<o:p></o:p></P>
<P style="MARGIN-BOTTOM: 12pt" class=MsoNormal><BR>I've been watching your
tracks. I'm not sure the dead zones are as dead as<BR>all that.
Still, there are some notable places where there are searches and<BR>that
have spots where you can't be heard.<o:p></o:p></P>
<P class=MsoNormal>I have a YAESU VX-8DR ht that I carry with me<BR>both when
practicing and on actual searches. I am considering buying a<BR>Kenwood
TM-D710A. I would like to use the 710 in my mobile as a digipeater<BR>to either
get back to search base on a search or to a mountain digi when I'm<BR>practicing
so my family can know where I'm at on APRS.fi. I would typically<BR>be within a
couple of miles from my truck when I transmitted an APRS signal<BR>from my ht.
How much power does the 710 transmit when in digipeater mode?<o:p></o:p></P>
<P style="MARGIN-BOTTOM: 12pt" class=MsoNormal><BR>It transmits with the same
power that you have set for its own APRS<BR>transmissions.<o:p></o:p></P>
<P class=MsoNormal>Would this be a situation where using a mobile would be
useful? Presently,<BR>it just doesn't seem I have the punch I need when using
the ht.<o:p></o:p></P>
<P style="MARGIN-BOTTOM: 12pt" class=MsoNormal><BR>It would help if your truck
is generally within range of your handheld, the<BR>truck is in a good place
where it is getting digipeated, and you don't have<BR>terrain in between you and
the truck that prevents the truck from hearing you.<BR><BR>In this case you
could use your truck's callsign as the first hop in your<BR>digi path, and
WIDE2-2 next in the path. That'd let your truck beacon you<BR>with more
ooomph.<BR><BR>The downside of this is that if you wind up in a spot where your
truck's<BR>radio can't hear you, you won't get anywhere even if a WIDE can hear
you,<BR>because they won't premptively digipeat before your truck.<BR><BR>It's
unfortunate that Yaesu chose not to implement "Proportional Pathing" in
the<BR>VX-8*R series radios. The VX-8R lets you set 8 paths, but rather
than<BR>cycling through them, it simply concatenates them for every
transmission. I'm<BR>unfamiliar with the VX-8DR, maybe it does have proportional
pathing. With<BR>proportional pathing, you can set multiple digi paths,
but rather than using<BR>them all at once, it cycles through them for each
transmission. Then you<BR>could have "TRUCK,WIDE2-2" for every third
transmission,<BR>"WIDE1-1,WIDE2-2" for every third transmission, and "WIDE2-2"
for every third.<BR>That would take care of making sure that at least SOME of
your packets get<BR>to a wide digi --- either directly, or through your truck,
or through a fill-in.<o:p></o:p></P>
<P class=MsoNormal>Unfortunately, the people I know both in SAR and amateur
radio have never<BR>played with mobile digipeaters and are pretty clueless on
the matter.<o:p></o:p></P>
<P class=MsoNormal><BR>Clueless? I don't think that's a fair
statement.<BR><BR>To date, most SAR activities in the state have managed without
pressing need<BR>for mobile digis. NM SAR Support's comms trailer does
have a TNC programmed<BR>to digi WIDE1-1, so if your path is WIDE1-1, WIDE2-2
(which is OK in NM for<BR>low-powered stations and ONLY low-powered stations...
there was a big<BR>discussion on that subject recently, and you should check the
archives<BR>about it, I won't open that can of worms again), then the comms
trailer in<BR>base will serve as a fill-in digi if needed. We also have a
portable digi we<BR>can place in the search area when necessary. It is
rarely necessary, but it<BR>does get deployed now and then.<BR><BR>You should
also set your D710 to do TEMPn-N digipeating, but I'm sure<BR>Bob B. will pipe
in here quickly about that one. Right now, very few people<BR>in the SAR
community have their radios set up for it, so counting on the<BR>availability of
TEMPn-N on searches is not a safe bet just yet. But if you<BR>set your own
truck to do TEMPn-N, then when you know you aren't reaching<BR>a wide with your
handheld on a search, and you know you can hear your truck,<BR>you can tinker
with your path to use TEMPn-N for a while to be sure of getting<BR>out.
You'd use "TEMP1-1,WIDE2-2" in that case, and as long as your truck<BR>can
hear you you're good.<BR><BR>One thing you should NOT do is set your truck to
digipeat WIDEn-N as if it<BR>were permanent infrastructure. Some folks in
NMSAR did do that for a while<BR>and it was a terrible mistake --- it meant that
ALL traffic heard by the<BR>incident comms trailer was getting digipeated if it
had any wide hops left.<BR>That meant the APRS radio in the trailer was
transmitting all the time, and<BR>desensing lots of nearby voice radios every
few seconds.<BR><BR>-- <BR>Tom Russo KM5VY SAR502
DM64ux <A href="http://www.swcp.com/~russo/"
target=_blank>http://www.swcp.com/~russo/</A><BR>Tijeras, NM QRPL#1592
K2#398 SOC#236 <A href="http://kevan.org/brain.cgi?DDTNM"
target=_blank>http://kevan.org/brain.cgi?DDTNM</A><BR>"One man alone can be
pretty dumb sometimes, but for real bona fide<BR>stupidity, there ain't nothin'
can beat teamwork." - Edward
Abbey<BR><BR><BR>_______________________________________________<BR>aprssig
mailing list<BR><A href="mailto:aprssig@tapr.org"
target=_blank>aprssig@tapr.org</A><BR><A
href="https://www.tapr.org/cgi-bin/mailman/listinfo/aprssig"
target=_blank>https://www.tapr.org/cgi-bin/mailman/listinfo/aprssig</A>
<o:p></o:p></P>
<P style="MARGIN-BOTTOM: 12pt"
class=MsoNormal><BR><BR>_______________________________________________<BR>aprssig
mailing list<BR><A href="mailto:aprssig@tapr.org"
target=_blank>aprssig@tapr.org</A><BR><A
href="https://www.tapr.org/cgi-bin/mailman/listinfo/aprssig"
target=_blank>https://www.tapr.org/cgi-bin/mailman/listinfo/aprssig</A><o:p></o:p></P>
<P
class=MsoNormal><BR><BR>_______________________________________________<BR>aprssig
mailing list<BR><A href="mailto:aprssig@tapr.org"
target=_blank>aprssig@tapr.org</A><BR><A
href="https://www.tapr.org/cgi-bin/mailman/listinfo/aprssig"
target=_blank>https://www.tapr.org/cgi-bin/mailman/listinfo/aprssig</A><o:p></o:p></P></DIV></DIV></DIV>
<P class=MsoNormal><o:p> </o:p></P></DIV>
<P>
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