Author Archives: Daniel

M17 Analog Hotspot Gateway, a surprising Amazon find ?!

Posted on January 16, 2025 by Daniel

Sometimes you stumble on weird things on Amazon, in my case an M17 Analog gateway for about €40 from Amazon Germany shop. Curious on this device, and simply also somewhat surprised to find a M17 gateway on Amazon I ordered … Continue reading →

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Tuning the bandpass filters on an Icom commercial mobile radio..

Posted on January 13, 2025 by Daniel

.. is actually pretty cool. Is it magic? 🙂

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Calibrating a Radio Duplexer Using a Vector Network Analyzer (VNA)

Posted on January 12, 2025 by Daniel

This guide outlines the process of calibrating a radio duplexer to ensure optimal performance by minimizing insertion loss, maximizing isolation, and achieving proper frequency separation. Continue reading →

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MD-380 Volume Control Modification for OpenRTX/M17

Posted on January 11, 2025 by Daniel

Today I performed the MD-380 Volume Control Modification for OpenRTX/M17 on one of my MD-380 radios. This was to try to get the audio level improved for M17, after updating the radio with OpenRTX. https://github.com/OpenRTX/OpenRTX/issues/266 I did the mod as … Continue reading →

Posted in Digital Modes (VHF/UHF), M17, TYT MD380, VHF/UHF Transceivers | Comments Off on MD-380 Volume Control Modification for OpenRTX/M17

Happy happy. With my new Vector Network Analyser: the LibreVNA

Posted on January 11, 2025 by Daniel

After having used the amazing VNWA3SE Automatic 2 Port VNA from DG8SAQ for several years now, I needed an upgrade to be able to better calibrate my antenna duplexer. After reasearching quite a bit I found the LibreVNA, a 100khz-6Ghz … Continue reading →

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My new M17 Module17

Posted on January 4, 2025 by Daniel

Happy me! Today both my Module17 arrived from China and the OLED Display module from Amazon. Coincidentally both on the same day. So in parallel to 3D printing the case, I build , flashed and tested the Module17 and a … Continue reading →

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Modifying the RT3S / MD-UV380 for M17

Posted on January 2, 2025 by Daniel

The OpenRTX M17 user-guide is pretty clear on how to do this mod, but these are my pictures of the modification I did earlier today:

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A 100kw power amp :-)

Posted on December 31, 2024 by Daniel

Yesterday I visited the German Armed Forces Technology Museum in Koblenz; the Wehrtechnische Studiensammlung (WTS) This is an amazing place to visit, which I can highly recommend to anyone who has a passion for (millitary) technology. To my surprise they … Continue reading →

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Yaesu FTM-400D Repair

Posted on December 28, 2024 by Daniel

I’ve been eyeing the Yaesu FTM-400D for quite some time. A friend of mine had one installed in his car, and I was impressed by its true dual-band functionality, the sleek display, and its 9k6 data connection. Since these models … Continue reading →

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M17 Experimenting

Posted on December 25, 2024 by Daniel

I finally had time to get M17 working and do some first experiments. Please have a look at my dedicated page on how this is working out!

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