Technical Articles

Digital Modes | News | Technical Articles

WSPR, Weak Signal Propagation Reporter
ByJim Edmondson (N5JGE) 1-January-20232-July-2026

WSPR – Weak Signal Propagation Reporter Jim Edmondson, N5JGE WSPR stands for Weak Signal Propagation Reporter. It is one of the modes available in the popular WSJT-X software used by many hams for FT8 digital communication. If you have setup your radio and computer to run FT8, you are ready to try WSPR. WSPR was…

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Digital Modes | Technical Articles | Winlink

VarAC for HF / FM Digital Chat
ByJim Edmondson (N5JGE) 1-November-20222-July-2026

Jim Edmondson, N5JGE, 2022-11 This article will start with some perspective on the history of digital (or data) modes and then discuss the recent development of a new digital mode based on the Vara software modems in more detail. Digital modes have been used by hams in many different forms for a very long time….

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