If you’re an amateur radio operator dabbling with APRS (Automatic Packet Reporting System), you’ve probably heard of software like Xastir or APRSISCE. But there’s another powerful, under-the-radar option out there: YAAC, short for Yet Another APRS Client.

Developed by Andrew Pavlin, KA2DDO, YAAC is a cross-platform APRS client written in Java. It’s free, open-source, and remarkably feature-rich. Whether you’re trying to track APRS packets from the Internet or your TNC, set up an I-Gate, or experiment with plugins and telemetry — YAAC can handle it all.

Why YAAC?

YAAC isn’t just another APRS visualizer. It’s a full-fledged APRS client that runs on Windows, Linux, macOS, Raspberry Pi, and even FreeBSD. The UI is simple but functional, and there’s extensive documentation to help you get started. What really sets YAAC apart is its modular design and extensibility. You can write plugins or use existing ones to integrate features like:

• Weather overlays
• Aircraft tracking via ADS-B
• Callsign database lookup
• Secure authentication over APRS
• AREDN mesh object mapping
• Repeater finder
• Integration with TAK networks (yes, you can bridge data to ATAK/iTAK!)

Key Features

• Multiple map views using OpenStreetMap, with offline support
• Operates as a standalone client, digipeater, or Internet gateway
• Connects via TNCs (Kenwood, TinyTrak, Mobilinkd, etc.) or soundmodems (DireWolf, UZ7HO)
• Full support for APRS-IS, including secure SSL-based login (experimental)
• GPS and weather station integration
• Can be automated, extended, and used headless for lightweight setups

Runs Anywhere – Even on Raspberry Pi

YAAC is a solid option for low-power or portable use. It works well on Raspberry Pi models 2, 3, and 4, and has specific guidance for installation on Pi OS. If you’re setting up a field APRS tracker or a compact I-Gate node, this is worth a look.

Installation is as simple as downloading the .zip, unzipping it, and launching with:

java -jar YAAC.jar

Just make sure you’re running Java 8 or later with GUI (not headless-only).

Plugin Ecosystem

YAAC includes a surprisingly rich plugin environment. Some of the coolest plugins I found:

• takplugin: allows YAAC to interface with ATAK/iTAK – useful for tactical teams or SAR
• soundsplugin: enables event-triggered speech alerts
• telemetryalarmplugin: monitor APRS telemetry and trigger warnings
• dynamicobjectsplugin: create moving APRS objects based on GPX tracks

You can install them directly from the app under Help → Install Plugins.

What’s the Catch?

YAAC is written in Java, and while it works well, the interface is a bit old-school compared to modern UI expectations. It also doesn’t run on Android (yet), since it relies on AWT and Swing for its graphics. But if you’re comfortable with a traditional desktop-style interface, you’ll find it reliable and flexible.

It might take some initial setup — especially for configuring TNCs or APRS-IS connections — but once it’s running, it’s rock solid.

Final Thoughts

YAAC is one of those hidden gems in the ham radio software world. It’s open, active, and made with care by someone who clearly understands the needs of operators. Whether you’re just listening to APRS traffic or building a more complex setup (digipeater, I-Gate, or telemetry station), YAAC is up to the task.

Give it a try. Unzip it, configure your port, and get on the air.
And if you’re a developer, jump in and write a plugin — the community could use more contributors.

Download YAAC here

The post Exploring YAAC: A Powerful Open-Source APRS Tool for Hams appeared on Hamradio.my - Amateur Radio, Tech Insights and Product Reviews by 9M2PJU.

And Why It’s More Than Just Playing with Walkie-Talkies

If you’ve ever seen someone with a handheld radio and thought, “Oh, just another walkie-talkie user,” you’re not alone. But there’s a whole world behind that antenna — and it’s called amateur radio, or more affectionately, ham radio.

And no, it’s not just for old guys tinkering in their basements. It’s for anyone who loves learning, experimenting, helping their community, and yes, talking to people around the world using nothing but radio waves and know-how.

Let’s clear the air.

So What Is Amateur Radio?

Amateur radio is a licensed, non-commercial radio service that allows people to communicate across town, across countries, or even with astronauts on the International Space Station — all without the internet or cell networks.

It’s defined by international and national laws as a service for:

“Self-training, intercommunication, and technical investigations carried out by duly authorized persons interested in radio technique solely with a personal aim and without pecuniary interest.” – ITU Radio Regulations

In short, it’s about learning, experimenting, helping, and connecting — not making money.

Why Do People Confuse It with Walkie-Talkies?

Because on the surface, it looks the same.

Someone holding a handheld radio? Must be a walkie-talkie, right?

Not always. Here’s where the confusion happens:

Feature	Amateur Radio	Walkie-Talkie Users (e.g. FRS, PMR446)
License required?	Yes (with exam)	No
Power limits	Up to 1000W (in some bands)	Low (usually <2W)
Frequencies	Dedicated amateur bands	Shared public frequencies
Purpose	Education, emergency, experimentation	Casual use
Can you build your gear?	Yes	No
International communication?	Yes	No
Part of emergency services?	Often, yes	No

Walkie-talkies are great tools — simple and effective — but they’re like toy trains compared to real locomotives when it comes to what ham radio can do.

Why Is It Called “Amateur” Radio?

This is where it gets interesting. People hear the word “amateur” and think unskilled or just a beginner.

That’s wrong.

The word amateur comes from the Latin amātor, which means “lover” — as in, someone who does something purely for the love of it. It comes from amāre, meaning to love.

So when we say “amateur radio,” we’re not talking about skill level. We’re talking about intent. It means:

You’re in it because you love it — not because you’re getting paid.

And many hams are far from unskilled — they’re engineers, inventors, emergency responders, scientists, astronauts. Some of the world’s most impressive communication innovations came from amateurs.

What Makes a Ham Radio Operator?

A real amateur radio operator:

• Passes a license exam (that covers electronics, laws, and best practices)
• Operates on regulated frequencies
• Often builds or modifies equipment
• Can communicate over long distances, sometimes around the globe
• Participates in emergency communications, disaster response, or public service events
• Uses advanced modes like digital, Morse code, satellites, or even bouncing signals off the moon

It’s not just about chatting — it’s about science, community, and curiosity.

Why It Still Matters Today

In an age of smartphones, the internet, and satellite, everything — why bother?

Because when infrastructure fails (like during natural disasters), amateur radio still works.

Because it teaches real-world electronics and physics.

Because it brings people together, from villages to space stations.

And because it’s just plain fun.

Final Thoughts

Amateur radio isn’t about being “less than professional.” It’s about loving the craft, giving back to the community, and exploring the airwaves with curiosity and purpose.

Apakah Itu Radio Amatur?

Dan Kenapa Ia Bukan Sekadar “Pengguna Walkie-Talkie”

Pernah tengok seseorang pegang walkie talkie dan anda mesti terfikir, “Oh, mesti dia guna walkie-talkie je tu…”?

Ramai orang keliru antara radio amatur dan walkie-talkie. Tapi hakikatnya, dunia radio amatur ini jauh lebih luas, lebih teknikal, dan lebih bermakna — bukan sekadar sembang atau alat mainan.

Definisi Radio Amatur

Radio amatur, atau lebih dikenali sebagai ham radio, ialah satu perkhidmatan komunikasi berlesen dan tidak komersial yang membolehkan individu berkomunikasi melalui gelombang radio atas tujuan:

• Pembelajaran dan latihan kendiri
• Eksperimen teknikal
• Komunikasi semasa kecemasan

Mengikut takrif rasmi oleh ITU (Badan Telekomunikasi Dunia):

“Perkhidmatan komunikasi yang dikendalikan oleh individu yang diberi kebenaran, untuk tujuan peribadi tanpa keuntungan, dengan minat dalam teknik radio.”

Jadi, radio amatur bukan sekadar hobi — ia melibatkan ilmu, etika, dan kemahiran sebenar dalam dunia komunikasi.

Kenapa Orang Selalu Keliru dengan Walkie-Talkie?

Sebab dari luar, nampak lebih kurang sama: orang pegang radio dan bercakap. Tapi sebenarnya ada beza.

Ciri	Radio Amatur	Walkie-Talkie Biasa (PMR446, FRS)
Lesen diperlukan?	Ya	Tidak
Had kuasa pancaran	Tinggi (hingga 1000W di sesetengah band)	Rendah (0.5 – 2W)
Frekuensi	Jalur khas untuk radio amatur	Jalur awam, kongsi ramai
Tujuan	Pendidikan, eksperimen, kecemasan	Sembang ringkas, rekreasi
Bina peralatan sendiri?	Ya	Tidak
Komunikasi antarabangsa	Ya	Tidak

Walkie-talkie sesuai untuk kegunaan kasual — di pusat beli-belah, konvoi kereta, event. Tapi radio amatur ialah komunikasi sebenar, dengan rangkaian global dan peranan dalam bencana.

Kenapa Dipanggil “Amatur”?

Ramai sangka “amatur” bermaksud “tak mahir”.

Tapi sebenarnya perkataan “amatur” berasal dari bahasa Latin “amātor”, yang bermaksud “pencinta” — orang yang buat sesuatu kerana minat dan kecintaan, bukan sebab duit.

Jadi “radio amatur” bermaksud:

“Komunikasi radio yang dilakukan oleh individu yang cintakan bidang ini, tanpa keuntungan.”

Ramai operator amatur adalah jurutera, saintis, juruteknik, dan juga sukarelawan yang menyumbang dalam bencana. Malah, angkasawan di ISS pun guna frekuensi radio amatur untuk bercakap dengan pelajar sekolah.

Apa Yang Menjadikan Seorang “Ham”?

Seorang operator radio amatur yang sah:

• Lulus ujian lesen (teori elektronik, peraturan, dan amali)
• Bereksperimen pada frekuensi dengan betul dan beretika
• Perhubungan seluruh dunia, menggunakan HF, VHF, satelit, atau isyarat pantulan bulan dan lain-lain
• Menyumbang dalam komunikasi semasa kecemasan dan bencana
• Penggunaan mod digital, Morse code, atau teknik-teknik lain

Bukan sekadar “sembang” — ini adalah ilmu, sains, dan perkhidmatan kepada masyarakat.

Masih Relevan pada Hari Ini?

Sangat relevan. Dalam dunia penuh berteknologi, radio amatur:

• Tetap berfungsi walaupun tiada internet atau talian
• Jadi penyelamat semasa bencana alam atau kecemasan
• Mengajar kita tentang ilmu elektronik, antena, dan komunikasi sebenar
• Merapatkan hubungan dengan komuniti global — tanpa sebarang kos langganan

Kesimpulan

Radio amatur bukan perkara main-main. Ia adalah satu dunia yang penuh dengan ilmu, cabaran, dan kepuasan. Ianya untuk mereka yang minat, ingin membantu orang lain, dan pembelajaran sepanjang hayat.

The post What is Amateur Radio? Apakah Itu Radio Amatur? appeared on Hamradio.my - Amateur Radio, Tech Insights and Product Reviews by 9M2PJU.

Software-defined radio (SDR) enthusiasts and amateur radio operators seeking an affordable yet powerful solution will find the Radioberry an exciting project to explore. Designed as a Raspberry Pi HAT, the Radioberry transforms a Raspberry Pi into a fully functional SDR transceiver, making it an excellent choice for radio experimentation and communication.

What is Radioberry?

The Radioberry is an open-source SDR transceiver designed to cover the 0-30 MHz frequency range. It leverages an Analog Devices AD9866 chipset, originally intended as a broadband modem mixed signal front-end, repurposed for Direct Down Conversion (DDC) and Direct Up Conversion (DUC) functionality. This design enables high-performance SDR capabilities with a 12-bit resolution, making it ideal for amateur radio and other radio-related applications.

At the core of the Radioberry is an Intel Cyclone 10LP FPGA, which supports 10CL16 and 10CL25 models. The FPGA firmware is dynamically loaded via the Raspberry Pi, providing a streamlined and flexible setup without the need for external programming hardware. The power supply for the Radioberry is conveniently drawn from the Raspberry Pi, simplifying the overall design and integration.

Why Choose Radioberry?

Radioberry stands out as a compelling choice for SDR enthusiasts due to its:

• Compact form factor: Seamlessly integrates with Raspberry Pi.
• Open-source philosophy: Both hardware and software are freely available.
• Cost-effective design: A budget-friendly alternative to commercial SDR solutions.
• Flexibility: Supports various modes and can be customized to meet specific needs.

Radioberry 2.x – Enhanced Performance & Features

The Radioberry 2.x builds on the original design, offering improved performance and additional features. Enthusiasts can find comprehensive details, including schematics, installation guides, and firmware updates, in the resources below.

Resources for Builders

For those interested in building their own Radioberry SDR transceiver, here are some valuable resources:

• Discussion & Community Support: Google Groups discussion forum
• Source Code & Firmware: Radioberry GitHub Repository
• Technical Documentation: Radioberry WIKI with additional information
• Installation & Setup Guide: Radioberry Releases for easy installation
• Hardware Design: Radioberry Schematic
• Real-World Applications: Radioberry transceiver insights by Gopan VU2XTO
• User Demonstrations: Recording of Radioberry 2 in action by Jacinto CU2ED

A Project for Radio Enthusiasts

The Radioberry is more than just a radio project—it’s a testament to the power of open-source collaboration and the ingenuity of the amateur radio community. This project is not for sale but rather an open-source initiative to empower builders and experimenters worldwide.

For those looking to dive into SDR development, experiment with amateur radio, or explore FPGA-based radio solutions, the Radioberry is a fantastic place to start.

Visit https://www.pa3gsb.nl/

The post Radioberry: A Raspberry Pi-Based SDR Transceiver appeared on Hamradio.my - Amateur Radio, Tech Insights and Product Reviews by 9M2PJU.