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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>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-size:11.0pt;font-family:Wingdings;color:#1F497D'>J</span><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>. 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-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>dave<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>N5FMA<o:p></o:p></span></p><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> 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 class=MsoNormal style='margin-bottom:12.0pt'>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 class=MsoNormal style='margin-bottom:12.0pt'><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 class=MsoNormal style='margin-bottom:12.0pt'><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 class=MsoNormal style='margin-bottom:12.0pt'><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 class=MsoNormal style='margin-bottom:12.0pt'><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 class=MsoNormal style='margin-bottom:12.0pt'><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></body></html>