Category: Ham Radio
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Arduino KISS TNC
Mobilinkd (http://www.mobilinkd.com) is the producer of very compact and capable bluetooth enabled KISS mode TNCs that are used with APRS applications on Android, iOS, Windows, and Linux, and Mac OS. Their original prototype was built using the Arduino platform. On their website, they provide breadboard descriptions of various TNC designs including an Arduino based KISS…
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YAdmHS – Yet another digital mode hot spot …
I got to thinking about how I could make a thinner MMDVM based multi-mode hotspot with a Nextion display. I decided to try mounting the boards next to each other instead of plugging the MMDVM board into the Pi ZeroW board. I also wanted the case to have rounded corners. Here is what I came…
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APRS on Raspberry Pi
About a decade ago I bought a TNC-X from Coastal Chipworks. I used it for a fill in digi for Laguna Niguel for a while. I bought the X-Track and X-Digi add-on boards for the TNC-X as well. Unfortunately, when I tried to add a larger 5V regulator to power an external GPS, my dyslexia…
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Kenwood TM-742 Backlight Repair – with LEDs!
Kenwood TM-x42 tri-band mobile radios have six 6.3 volt incandescent bulbs arranged in three pairs of two bulbs each to light up the display. Eventually the bulbs burn out and since they’re wired in series, they go out in pairs. I recently replaced the backlight bulbs in a friends TM-642 with white LEDs. I used…
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Fun with OpenRepeater / SvxLink
In the Summer of 2017, I built an EchoLink “link node” using a Raspberry Pi 2 Single Board Computer, 900MHz quad-core ARM cortex A7, 1GB RAM, 10/100 Ethernet. The software is called “SvxLink” named after the call sign of the author, Tobias, SM0SVX. Information about the svxLink application can be found on Github at: http://www.svxlink.org…
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Fun with Digital Voice Dongles and Multi-Mode MMDVM Hotspots
Quite a long time ago, Robin, AA4RC gave me a DV Dongle that he had recently developed. It was amazing! It enabled something that wasn’t possible before. With the DV Dongle connected to my Mac, I could monitor the activity on remote D-STAR gateways and talk to folks on the world-wide the D-STAR system without…