TH-D72A/E - N3UJJ
TH-D72A/E - N3UJJ TH-D72A/E - N3UJJ
2 HOW YOU ENJOY APRS WITH TH-D72A/E (WRITTEN BY BOB BRUNINGA, WB4APR)APRS-ISIn 1997, K4HG and the Mac/WinAPRS Sproul brothers tied APRS to the Internet and the APRS-ISsystem as shown above was born. While this was a huge success that enabled instantaneous globalAPRS texting connectivity beyond our wildest dreams, it also further enhanced the map viewexperience of casual APRS viewers. Looking at an APRS map was colorful but it did not obviouslyconvey the human contact and connectivity inherent in the system. Also, it was impossible tocommunicate with all of the one-way trackers equipment and the value of two-way amateur radiocommunications was further being lost in favor of simple two-dimensional icons on maps. Furtherthese simple icons omitted the other 8 dimensions of color attributes that gave additional at-a-glancereal time information to viewers.See http://aprs.org/symbols.htmlAPRS Handheld and Mobile RadiosTo counteract this trend, we stopped using “Position” and went back to the original “Packet”nomenclature for APRS. Then in 1998, Kenwood gave a landmark boost to APRS in the field and tothis digital communications capability by introducing the fully integrated TH-D7A/E. Thus TH-D7A/Eput APRS in the palm of the hand of ham radio operators worldwide. Not only did it take GPS inputs,but it fully implemented the APRS messaging, bulletins and texting capabilities. Over the next 11years, this predecessor to the TH-D72A/E was the most popular Kenwood HT ever as APRS broughtnew life to packet radio. In parallel, Kenwood also introduced the fully integrated TM-D700A/Emobile APRS radio in 2000. These APRS front-panel-display radios now brought the full APRS localsituational awareness to the mobile operator as shown below. With these displays, the APRSinformation content delivery system was in place without any need for mobile PC’s or laptops.Further, the attached GPS provided the map display and the radio display provided all the otherinformation content.6 CONTENTS TH-D72A/EFrom The N3UJJ.COM Document Library
2 HOW YOU ENJOY APRS WITH TH-D72A/E (WRITTEN BY BOB BRUNINGA, WB4APR)TextingBut still most non APRS ham radio operators just did not find any advantages beyond the maps. Myfrustration with the growing lack of live human content in APRS continued to fester to the breakingpoint at a 2006 ARRL Special Meeting at Dayton on the lack of youth in ham radio. The gatheredfathers of ARRL lamented: “Ham radio was missing the youth. They were “too busy texting on theircell phones” and ham radio had nothing similar to offer”. I was incensed. Ham radio had hadwireless hand-held texting and email for nearly a decade in the form of the handheld Kenwood APRSTH-D7A/E and yet even the amateur radio leadership was not aware and had never tried it. This wasfrustrating. The reason was because while the hams were shunning real-time APRS digital textcommunications, the kids of the world were just getting going with texting and then Twitter on everyconceivable handheld device. Yet the entrenched amateur radio old timers could not see any valueto APRS texting and emailing on a keypad.As mentioned in the above illustration, there are more than 26 different text systems available.I counted over 26 different texting systems in ham radio as suggested in the image above.Fortunately, today just about every smartphone and handheld has an application for APRS messagecompatibility. Our goal in APRS is to seamlessly integrate these disjointed systems so that amessage-to-callsign from any device gets delivered to the callsign owner on any device that iscurrently turned on. Many of these systems are already connected by APRS and the APRS-Internetsystem (APRS-IS).Refer to: http://aprs.org/aprs-messaging.htmlTH-D72A/E CONTENTS 7From The N3UJJ.COM Document Library
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2 HOW YOU ENJOY APRS WI<strong>TH</strong> <strong>TH</strong>-<strong>D72A</strong>/E (WRITTEN BY BOB BRUNINGA, WB4APR)APRS-ISIn 1997, K4HG and the Mac/WinAPRS Sproul brothers tied APRS to the Internet and the APRS-ISsystem as shown above was born. While this was a huge success that enabled instantaneous globalAPRS texting connectivity beyond our wildest dreams, it also further enhanced the map viewexperience of casual APRS viewers. Looking at an APRS map was colorful but it did not obviouslyconvey the human contact and connectivity inherent in the system. Also, it was impossible tocommunicate with all of the one-way trackers equipment and the value of two-way amateur radiocommunications was further being lost in favor of simple two-dimensional icons on maps. Furtherthese simple icons omitted the other 8 dimensions of color attributes that gave additional at-a-glancereal time information to viewers.See http://aprs.org/symbols.htmlAPRS Handheld and Mobile RadiosTo counteract this trend, we stopped using “Position” and went back to the original “Packet”nomenclature for APRS. Then in 1998, Kenwood gave a landmark boost to APRS in the field and tothis digital communications capability by introducing the fully integrated <strong>TH</strong>-D7A/E. Thus <strong>TH</strong>-D7A/Eput APRS in the palm of the hand of ham radio operators worldwide. Not only did it take GPS inputs,but it fully implemented the APRS messaging, bulletins and texting capabilities. Over the next 11years, this predecessor to the <strong>TH</strong>-<strong>D72A</strong>/E was the most popular Kenwood HT ever as APRS broughtnew life to packet radio. In parallel, Kenwood also introduced the fully integrated TM-D700A/Emobile APRS radio in 2000. These APRS front-panel-display radios now brought the full APRS localsituational awareness to the mobile operator as shown below. With these displays, the APRSinformation content delivery system was in place without any need for mobile PC’s or laptops.Further, the attached GPS provided the map display and the radio display provided all the otherinformation content.6 CONTENTS <strong>TH</strong>-<strong>D72A</strong>/EFrom The <strong>N3UJJ</strong>.COM Document Library
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