{"id":1142,"date":"2025-12-20T18:26:54","date_gmt":"2025-12-21T02:26:54","guid":{"rendered":"https:\/\/www.danplanet.com\/blog\/?p=1142"},"modified":"2026-01-01T08:47:14","modified_gmt":"2026-01-01T16:47:14","slug":"creating-a-d700ga-conversion-kit","status":"publish","type":"post","link":"https:\/\/www.danplanet.com\/blog\/2025\/12\/20\/creating-a-d700ga-conversion-kit\/","title":{"rendered":"Creating a D700GA conversion kit"},"content":{"rendered":"

I have a couple of Kenwood TM-D700 radios that I like. They are really solid, and for the most part, very good for their integrated APRS capabilities. In the old days when you had to connect a GPS to the radio to get it to beacon, I actually preferred the D700 because the GPS connected to the radio itself, instead of the head like the D710. I always thought that was a really unfortunate design point of the later radio – having to route another cable to the head. When the D710GA came out, that became moot of course, as building the GPS into the head unit itself made it mostly a non-issue.<\/p>\n

There are a couple other drawbacks to the D700, like lack of smart beaconing and some annoying rules that require you to run APRS on the left side of the radio in order to tune anything on the right side. But aside from that, they’re nice. I have made a couple of attempts to modernize my D700s in the last, like by hiding a bluetooth serial module in the radio itself<\/a>. That’s neat and handy, but only useful for a few circumstances.<\/p>\n

Recently I had an idea to also integrate a GPS module into the plastic nose as well. I did cram one in there, but it’s becoming a mess (with the bluetooth module as well) and the size of GPS antenna I was able to get in there left me with really sub-par performance. That, and a lot of people mount the radio body in a trunk or under a seat, which makes a receiver in the radio itself less than ideal.<\/p>\n

After doing all that work and being underwhelmed, I thought: what if I were to integrate a GPS module in the head unit and plumb it back through to the radio? Putting the GPS receiver in the head was a very nice benefit of the D710GA, since most people have the head up front, usually in view of multiple windows, etc. Doing something similar for the D700 would be nice.<\/p>\n

\"\"<\/a><\/p>\n

So, I present to you…the D700G<\/span>A conversion kit<\/a>. This is a replacement back cover for the control head that houses a GPS receiver and an interface board. The interface board squashes the four usual pins of the control head interface into an 8P8C modular plug (like the D710 uses), along with GPS data lines. Then, another board on the other end of a standard ethernet cable splits the two back out into the RJ11 head cable and 2.5mm GPS data cable. The replacement back cover hides a jumper to the 4P4C original head connector on the left and presents the 8P8C on the right, fully contained within.<\/p>\n

\"\"<\/a><\/p>\n

The result is a D700A radio that behaves like a D710GA – you just turn it on, it has GPS and can beacon. The new cover makes the head significantly thicker, but it’s actually similar to the thickness of a D710.<\/p>\n

\"\"<\/a><\/p>\n

The GPS has a much larger antenna than the one in the D710GA and can maintain a much better fix in suboptimal conditions. It also receives GLONASS and GALILEO in addition to GPS for better performance. Instead of replicating the weird slot mount of the original head, I just integrated 1\/4-20 hardware into the back cover for easy interfacing with many other mounting solutions.<\/p>\n

\"\"And like the D710, this now allows the use of any off-the-shelf straight-through ethernet cable as a head separation path – much easier to source than the RJ11-to-RJ9 cable that the naked D700 requires.<\/p>\n","protected":false},"excerpt":{"rendered":"

I have a couple of Kenwood TM-D700 radios that I like. They are really solid, and for the most part, very good for their integrated APRS capabilities. In the old days when you had to connect a GPS to the … Continue reading →<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[57,243,249,62],"class_list":["post-1142","post","type-post","status-publish","format-standard","hentry","category-radio","tag-aprs","tag-d700","tag-gps","tag-kenwood"],"yoast_head":"\nCreating a D700GA conversion kit - Right Angles<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.danplanet.com\/blog\/2025\/12\/20\/creating-a-d700ga-conversion-kit\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Creating a D700GA conversion kit - Right Angles\" \/>\n<meta property=\"og:description\" content=\"I have a couple of Kenwood TM-D700 radios that I like. 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