Emerson Knives: The American Tactical Knife Brand Built for Extreme Use
Emerson Knives is one of the most recognized names in American tactical knives. Founded by…
Android Memory Extension: Should You Turn It Off or Set a GB Value?
Many Android phones now include a feature called Memory Extension, RAM Expansion, Virtual RAM, RAM…
deskHPSDR: SDR Frontend for OpenHPSDR Transceivers
Software-defined radio has given amateur radio operators a level of control, visibility, and flexibility that…
BHI: Cleaner Receive Audio for Amateur Radio Operators
In amateur radio, not every problem is solved with more power or a bigger antenna.…
Heil Sound: Why Ham Radio Operators Trust This Legendary Audio Brand
In amateur radio, your signal matters, but your audio matters too. A strong signal with…
LDG Tuners: The Box That Makes HF Life Easier
If you spend enough time around amateur radio operators, especially those working HF, you will…
Best Radio Test Equipment for Amateur Radio
Good radio test equipment helps you understand what is happening in your station. Without test…
Oscilloscope Usages for Amateur Radio
An oscilloscope is one of the most useful test instruments an amateur radio operator can…
How to Read a Smith Chart for Amateur Radio
Yes. I’d tighten it. The original is accurate overall, but a bit long and repeats…
Amateur Radio Units Explained: dB, dBm, Watts, SWR, SNR, SINAD, dBi and More
Amateur radio is full of numbers: watts, volts, ohms, decibels, megahertz, microvolts, SWR, SNR, SINAD,…
Measuring Radio Noise and Interference in Amateur Radio: Field Strength Meter, Gauss Meter, and Better Tools
Noise is one of the biggest enemies of amateur radio. A station can have a…
The W5GI Mystery Antenna: A Practical Multiband HF Wire Antenna
The W5GI Mystery Antenna is one of those amateur radio antennas that attracts attention because…
9M2PJU Amateur Radio EmComm Dashboard: A Practical Tool for Emergency Communications
When emergency communications work becomes active, the biggest challenge is rarely just getting on the…
The Best NEC2 Antenna Simulator for Linux
If you do antenna modeling on Linux, xnec2c is the tool to know. It is…
Why Amateur Radio Buyers Ask If Gear Comes From a Non-Smoking Shack
Learn why ham radio buyers ask whether used transceivers, microphones, and accessories come from a…
RF Current, Grounding, and Interference: Guide for Amateur Radio Operators
Amateur radio is a hobby built on invisible energy. We launch signals into the air,…
Amateur Radio in Malaysia: A Practical Hobby, A Technical Skill, And A Public Service
Amateur radio is often misunderstood from the outside. To some people, it looks like an…
WARC Bands: Origin, History and the Gentlemen’s Code
In amateur radio, not all HF bands are equal. Some are wide, crowded, and heavily…
The Dunning-Kruger Curve: What Amateur Radio Reveals About Overconfidence, Toxic Authority, and the Cost of Never Learning
There is a peculiar moment that most licensed amateur radio operators can recall with either…
Mencari Arah Kiblat dari Semenanjung Malaysia Menggunakan Kompas Bearing Oleh 9M2PJU
Mengetahui arah kiblat yang tepat adalah tanggungjawab setiap Muslim sebelum mendirikan solat. Di zaman serba…
Malaysian Coordinate Systems: Kertau, Datum, Map Projections, GDM2000, and GDM2020
Introduction If you have ever tried to overlay an old Malaysian topographic map onto a…
Amateur Radio and the Spirit Behind It
Amateur radio is often misunderstood by modern society, especially in countries where technology is seen…
The Anatomy of a Lid: History, Psychology, and Evolution of Amateur Radio’s Ultimate Insult
In the close-knit world of amateur radio, reputation is currency. Across the bands, operators are…
Why “Model First, Then Measure” Beats Guesswork in Amateur Radio Antenna Design
Have you ever built an antenna, and it didn't work as well as you thought?…
The Ultimate Handheld Walkie-Talkie Guide for Amateur Radio Beginners
Whether you call it a Handy Talkie (HT) or a walkie-talkie, a handheld transceiver is…
Learning CW for the Beginner Amateur Radio Operator: Hear the Music, Not the Math
Learning Morse code, or CW, feels like learning a new language. And it is. The…
Why a Lie Repeated Often Can Become “Truth”: A Psychological Breakdown
Ever heard the saying, “A lie told a thousand times becomes the truth”? It is…
HamLink – A Modern All-in-One Mobile Toolkit for Amateur Radio Operators
HamLink - Ham Radio Toolkit is a mobile application designed for licensed amateur radio operators…
Top 5 Best Watch Battery Brands
A watch is only as reliable as its power source. Whether it is a high-end…
DNS Propagation: How the Internet Learns Where Your Website Lives
The modern internet depends on the Domain Name System, better known as DNS. Every website…
RadioMail 1.5: Off-Grid Email for Amateur Radio
RadioMail 1.5 is an iOS email app that sends and receives messages over amateur radio…
How to Read Latitude and Longitude on a Topographic Map
Topographic maps from JUPEM show coordinates like 101°59'0"E and 3°10'0"N along the border. Those are…
9M2PJU Map & Compass: The Navigation Tool Amateur Radio Operators Need
Navigation and position reporting form the backbone of effective amateur radio operations. Whether you're coordinating…
Navigating Offline: Why Guru Maps is the Ultimate Tactical Tool for Amateur Radio Field Operations
For amateur radio operators (hams), the core of the hobby lies in making connections across…
BSD License vs GPL License: What Peoples Need to Know
Open source software relies on licensing frameworks that define usage rights and obligations. The two…
LightAPRS Gateway 1.0: A Standalone APRS Digipeater and iGate in a Small Box
The LightAPRS Gateway 1.0 is a purpose-built Linux-based APRS gateway board that combines an SA818V…
VARAtrack: A Compact APRS-over-VARA Tracker Built on a Windows Stick PC
For decades, the Byonics TinyTrack has been the go-to hardware for simple APRS tracking. Connect…
VARA Modem for APRS: What It Is and Why It Matters
VARA is a Windows-based soundcard software modem developed by EA5HVK in Spain. It comes in…
Off-Grid Navigation for Hams: Magic Earth App for Field and EmComm Operations
Amateur radio field operations demand absolute reliability from every piece of equipment in an operator's…
9M2PJU Amateur Radio Bearing Finder: A Practical Tool for Ham Radio Operators
Every amateur radio operator has been in this situation: you hear a station calling CQ…
Akita MeshTAK: An ATAK Plugin for Off-Grid Mesh Communication
When conventional networks go down, or are simply not an option, teams operating in the…
9M2PJU Lat Long to Kertau RSO Malaya Converter
If you work with mapping, emergency communications, forestry, or land surveying in Peninsular Malaysia, you…
Radio Messenger Is What Ham Radio Chat Should Have Been All Along
Amateur radio operators have been sending digital messages since the 1980s. Decades of packet radio,…
The Tactical Deployment of OsmAnd in Search and Rescue Operations
When a missing person incident escalates into a wilderness Search and Rescue (SAR) operation, standard…
Best Firewall & Router OS for Raspberry Pi, HTPC, and Mini PC
Whether you're a home lab enthusiast, a privacy-conscious user, or a small business owner, turning…
Graywolf: A Modern APRS Station That Actually Keeps Up With the Hardware It Runs On
If you've spent any time in the amateur radio packet world, you know the landscape.…
APRSdroid NA7Q Edition: The Most Feature-Rich APRS Client for Android
For years, APRSdroid has been one of the most widely used APRS applications available for…
The Iconic aprs.fi App Finally Lands on Android!
For a solid decade, a running joke in the amateur radio community went something like…
Navigating the Unseen: The Science, History, and Mastery of the Magnetic Compass
For thousands of years, traveling across vast oceans or featureless deserts was a gamble against…
The ClusterDuck Protocol (CDP): Architectural Analysis of an Open-Source, Ad-Hoc LoRa Mesh Network
The resilience of communications infrastructure is frequently tested by extreme weather events and natural disasters.…
The Copper-Wire Internet: How Ham Radio Conquered Real-Time Data and Global Spotting Before the Internet Wielded Its Might
Today, tracking a rare DX station or viewing the live movement of a portable radio…
The Swiss Army Multi-Tool: From Military Origin to 50 Practical Everyday Uses
The Victorinox Swiss Army Knife (SAK) is one of the most recognized design icons in…
Can an Apple AirTag Actually Save You If You Get Lost in a Forest With No Cell Service?
The Technical Answer: No. Here Is Why. There is a growing misconception that a RM129…
OSMand: The Complete Guide to Offline Navigation with OpenStreetMap
OSMand is a mobile navigation application built on OpenStreetMap data. The name stands for OpenStreetMap…
APRStac: A Modern APRS Suite in a Single Binary
APRStac is an APRS web client, digipeater, I-Gate, BBS, fileshare host, email gateway, and multi-protocol…
When Amateur Radio Meets Search and Rescue: LoRa APRS in the Search for Missing Hiker Jaslinda
https://www.youtube.com/watch?v=d2TUYJ63BOM When people hear the words amateur radio, many still picture hobbyists talking over the…
SARTrack: From Ham Radio Hobby to Life-Saving Search and Rescue Command System
https://www.youtube.com/watch?v=_ABUuiv8prU If you have ever wondered how modern search and rescue teams coordinate dozens of…
Linux and FreeBSD Operating Systems: Characteristics and Use Cases
1. Definitions and Project Structure 1.1 What Is Linux Linux refers to a kernel created…
Top Amateur Radio Open Source Projects in 2026
Open source software runs a huge part of modern amateur radio. From FT8 contacts to…
Can You Use a Malaysian PMR Walkie Talkie Overseas?
Short answer: You can bring it, but you can’t always use it.Your PMR446 walkie talkie…
Best Amateur Radio Logging Apps for Android and iOS in 2026
If you operate portable, do IOTA, POTA, SOTA, or just want to log QSOs without…
Why Your Phone Battery Health Drops And The Real Difference Between Li-ion, Li-Po, and LiFePO4
Brand new phone. Battery health: 100%. One year later, it shows 92%. After two years,…
The M5Stack Cardputer-Adv and Amateur Radio: 15 Real Possibilities Worth Exploring
Every ham knows the feeling: you see a new gadget and immediately think, "How can…
Understanding ARRL’s Clean Signal Initiative: What It Means for Every HF Operator
If you have spent any time on the HF bands, you have probably noticed the…
Why Do Japan’s APRS-IS Servers Run on FreeBSD? A Deep Dive Into status.aprs2.net
Introduction: What Is APRS-IS and Why Does The OS Matter? If you open https://status.aprs2.net/ right…
How FreeBSD and Ham Radio Still Shape the Future of Wireless Communication
A deep dive into Diane Bruce VA3DB’s “Amateur Radio and FreeBSD” from FreeBSD Journal July/August…
What’s Buzzing on the Bands? 4 Massive Ham Radio Trends Hitting 2026
If you have spun the VFO dial lately or checked out the latest field activations,…
Malaysia’s License-Free Walkie Talkie Frequencies: The 2025 MCMC Update You Need to Know
If you use walkie talkies for convoys, hiking, events, or work sites in Malaysia, the…
Tracking HamRadio.my Projects Uptime with uptime.hamradio.my
If you use any tools or services by 9M2PJU, there’s one link you should bookmark: https://uptime.hamradio.my/status/9m2pju…
APRS.world: The Browser-Based APRS Map That’s Changing How Hams See the World
If you are in amateur radio, you know APRS. Automatic Packet Reporting System lets us…
Why CW and Morse Code Still Thrive in Amateur Radio in 2026: Data, Physics and Practice
Introduction In an era of FT8, satellites, and 5G, the oldest digital mode still accounts…
The Net Control Station’s Secret Weapon: How NetControl.app Is Changing the Way Hams Run Nets
If you've ever sat behind the mic as net control, you know the drill. You…
The TIDRADIO TD-H9 in Black: A Deep Dive into the Most Feature-Packed Handheld Radio Under $70
When it comes to handheld radios, the market is flooded with options that promise the…
Beyond the VPN: The Deep Engineering of Tailscale vs. Twingate
The traditional VPN is a centralized bottleneck. If your server is in New York and…
What is NextDNS?
For anyone serious about privacy, speed, and security, the "Modern DNS" debate usually boils down…
Transforming Your Old Raspberry Pi into a Smart Home Hub with DietPi
Do you have an old Raspberry Pi gathering dust? Instead of letting it go to…
9M2PJU Amateur Radio Contesting Clock
Precision Timing and Propagation Intelligence for Modern Ham Radio Operators When every second counts in…
9M2PJU PRO SIGNAL
Professional Terrain-Aware RF Coverage for Amateur Radio Operators Understanding how far your signal truly reaches…
9M2PJU APRS Web Messenger
Real-Time APRS Messaging, Reimagined for the Modern Operator APRS has long been a powerful communication…
9M2PJU-6 APRS Malaysia Callsign Bot
Instant Callsign Intelligence Over APRS Finding accurate callsign information during on-air operations shouldn’t require a…
APRSMY APRS Net
Amateur radio has always been about more than just voice—it’s an evolving ecosystem of data…
9M2PJU NCS Dashboard
A High-Performance Digital Control Center for Amateur Radio Nets Running an amateur radio net—whether weekly,…
Never Miss a Signal: Synchronize Your Schedule with MY-HamCal
In the fast-paced world of amateur radio, timing is everything. Whether it’s a weekend contest,…
Strengthening the Connection: Discover the New MY-Callbook
For amateur radio operators, the callsign is more than just an ID—it’s a gateway to…
Navigating the Noise: Wisdom for Dealing with the “Willfully Ignorant”
We’ve all been there. You’re engaging in a discussion, perhaps about technical standards, community ethics,…
The Art of Not Engaging: Why You Should Stop Arguing with Irrational People
There is a blunt but brilliant Malay saying that goes: "Jangan buang masa berdebat dengan…
Why Mumble is the Best Kept Secret for Amateur Radio and Privacy-Conscious Civilians
In an era dominated by Discord, Zoom, and WhatsApp, it’s easy to overlook the tools…
QTH.app – Finally a proper APRS client for macOS?
I recently came across a new software for Mac users called QTH.app. If you use…
The Silent Sentinel: Why APRS is the Ultimate Digital Lifeline When the Grid Fails
Imagine a scenario: A hurricane has made landfall, or a massive wildfire has severed fiber…
The Invisible Web: Understanding the Amateur Radio DX Cluster
If you are a DXer (a hunter of long-distance contacts), the "Cluster" is likely your…
Happy New Year 2026
Wishing everyone a safe, prosperous, and happy new year! May 2026 bring you clear frequencies…
ANDRAX-NG v1001: Turning Your Smartphone into a Cyber Weapon
For years, the dream of the "mobile hacker" has been plagued by half-baked tools and…
Unleash the Shark: Why Bruce is the Ultimate Budget “Flipper Zero” Killer
In the world of portable offensive security, the Flipper Zero has been the undisputed king.…
Meet Tunnelto: The High-Performance Open-Source Tunnel Written in Rust
Every developer has been there. You’re building a webhooks integration, testing a mobile app against…
Turning Silicon into Radio: The Magic of Transmitting LoRa Without a Radio Chip
In the world of IoT, if you want to send data over a long distance,…
The Ultimate “DIY APRS TNC”: A Deep Dive into the ESP32APRS Audio Project
For years, if you wanted to set up a serious APRS (Automatic Packet Reporting System)…
Bridging the Analog-Digital Divide: A Deep Dive into ‘APRS pro’ for iOS
For decades, the Amateur Radio world has been somewhat bifurcated. On one side, you have…
How to Properly Change Coolant on Your Honda RS150R (The “Active Bleed” Method)
Is your RS150R running hotter than usual? Or maybe it's just time for that 24,000…
Why “Don” 10? The History of the Army’s Toughest Cable
If you have ever served in the Signals, you have likely encountered D10 Cable. Often…
