ON4RSX

Technical

Builds, schematics and theory

6 articles
Technical

Measuring your HF station - part 1/4 The SWR meter - What it measures, what it doesn’t tell you

SWR is probably one of the most closely watched figures in any amateur radio station. But what does an SWR meter actually measure, and more importantly, what does it not tell you?

👤 ON7VZ 📅 1 october 2026
Antennas HF Measurements & instrumentation Transceivers
Technical

Logsync- utility software WJSTX - MSHV

Logsync — a small utility that keeps your WSJT-X and MSHV logbooks in sync, so the "worked before" highlighting is consistent in both programs.

👤 ON7VZ 📅 24 june 2026
Software Digital modes
Technical

POTA Antennas - A practical field guide

Description des principales antennes utilisables pour des activités POTA

👤 ON8ON - ON7VZ 📅 4 june 2026
Antennas HF IOTA / SOTA / POTA
Technical

Working via satellite in 2026

A look back at the technical conditions necessary for satellite traffic.

👤 ON6QO 📅 3 june 2026
ISS Satellites
Technical

The origins of amateur radio satellites - From Sputnik to the Keplerian elements

From Sputnik 1 (1957) to OSCAR 1 (1961) and the Soviet RS satellites: history of the amateur radio satellite pioneers, Kepler's and Newton's laws applied to orbits, practical verification of T²/SMA³, and the Keplerian elements (TLE) used by every tracking software.

👤 ON6QO 📅 22 may 2026
ISS Satellites
Technical

How to solder

Reprint of a special issue published in Raspberry magazine, MagPI, and translated from the original article published in MakerSpaces.

👤 ON7VZ 📅 11 may 2026
Construction & fabrication Troubleshooting & repair Measurements & instrumentation Soldering & SMD