Icom IC-7300: A Digital Mode Powerhouse for the Modern HF Operator
For amateur radio operators focused on digital modes, the Icom IC-7300 has earned its reputation as one of the most practical and efficient HF transceivers ever produced. From…
HF
HF
(tr)uSDX: A Modern, Ultra-Portable HF QRP Transceiver
The (tr)uSDX is one of the most compelling examples of how open-source design, modern microcontrollers, and classic QRP philosophy can converge into a highly capable HF transceiver. Designed…
IC-7300, FT-991A, FTdx10
At-a-Glance Comparison Feature / Capability Icom IC-7300 Yaesu FT-991A Yaesu FTDX-10 Bands HF + 6 m HF + 6 m + 2 m + 70 cm HF +…
Icom IC‑7300: A Modern Classic in HF Radio
The Icom IC-7300 stands as a defining radio in the amateur radio world—a benchmark rig that blends cutting-edge technology with accessible operation. Since its introduction in 2015, it…
Harmonic Relationship Table
How to read this table and Fundamental (MHz) 2nd Harmonic (MHz) 2nd Overlaps 3rd Harmonic (MHz) 3rd Overlaps 4th Harmonic (MHz) 4th Overlaps 160 m 1.800–2.000 3.600–4.000 80…
Understanding Harmonics on the HF Amateur Radio Bands
Harmonics are an unavoidable byproduct of RF generation. Every HF transmitter—no matter how modern or well-filtered—produces harmonic energy at integer multiples of its fundamental frequency. On the HF…
How to Connect Your Xiegu Radio to Your Computer Using a USB CAT Interface
If you’re looking to connect your Xiegu transceiver to a computer for logging, digital modes, or CAT control, a USB CAT interface makes the process quick and straightforward.…
Diagnostic guide for mis-matched baluns (what to test and what it means)
Step 1 — Identify the symptom category A) “SWR is high everywhere” Likely causes: Action: B) “SWR is reasonable, but RF in the shack / hot mic /…
Ferrite core selection charts
A. Which mix to use (HF-focused) Mix Best general region Typical “why” Practical guidance Mix 31 ~1–30 MHz Excellent for choking common-mode on HF; good broadband behavior Best…
How to Choose the Right Balun: 4:1 vs 9:1 vs 49:1 Explained
Baluns and ununs are often treated as interchangeable “black boxes,” but selecting the correct impedance transformation ratio is critical for efficiency, bandwidth, and feedline behavior. Choosing incorrectly can…