What Is GMRS, and Why It Still Matters The General Mobile Radio Service (GMRS) is one of the most practical two-way radio services available in the United States. It occupies UHF spectrum around 462–467 MHz and is designed for short-…
Turning the Highest License into Meaningful Operating Passing the Amateur Extra exam feels like a summit moment. The studying is over, the callsign database updates, and suddenly you have full privileges across the amateur bands under the rules of the…
Why I Did It, What Changed, and Whether It’s Worth It For a long time, my General class amateur radio license did exactly what I needed it to do. I had meaningful HF access, solid VHF/UHF privileges, and the ability…
Radioddity GM-30 Plus and Using RT Systems Programming Software on Windows 11 This guide is written specifically for RT Systems programming software on Windows 11 and the Radioddity GM-30 Plus. The objective is to capture and preserve the factory configuration…
This workflow is written to work for most handhelds (ham or GMRS) whether you use manufacturer CPS or CHIRP. The goal is simple: create a “known-good” factory backup you can always restore. What you need Part 1 — Prep and…
Programming a handheld radio (HT) is one of the first tasks most operators undertake after purchase. Whether the radio is destined for amateur radio, GMRS, or public-safety monitoring, custom programming transforms a generic device into a purpose-built communications tool. However,…
A Feature-Level Comparison for Serious GMRS Users Radioddity has built a strong reputation in the GMRS handheld market by offering radios that go beyond basic “bubble-pack” functionality. Two models that frequently get compared are the Radioddity GM-30 Plus and the…
This script: Save as harmonics.py and run with python3 harmonics.py. Usage examples Below is an enhanced version that will Flag when a harmonic falls inside another ham band Add LPF design suggestions (e.g., recommended cutoff for each band) Export results…
Transmitters ideally generate a single radio-frequency carrier. In reality, non-linear devices (amplifiers, mixers, oscillators) generate harmonics — unwanted frequencies that occur at integer multiples of the fundamental operating frequency. Managing harmonic emissions is essential in amateur radio to: This article…
The GM-30 Pro’s zone and memory system allows you to run GMRS like a professional radio service. Below is a clean, scalable starter layout that mirrors how commercial and public-safety radios are organized. Zone 1 — GMRS Simplex (Local) Purpose:…