Start here · Essential guide
Ham Radio Digital Mode Identification by Sound and Waterfall
Learn to identify ham radio digital modes by ear and by waterfall: how FT8, PSK31, RTTY, WSPR and others look and sound, plus timing clues and decoder tools.
Bands, Modes & Software
Digital Modes
7 guides, starting with Ham Radio Digital Mode Identification by Sound and Waterfall.
Ham Radio Digital Mode Frequencies by Band
A guide to common ham radio digital mode frequencies for FT8, FT4, WSPR, PSK31 and more, with notes on dial versus audio frequency, software, and regional band plans.
Mesh Network Ham Radio: Building a Local Data Network
Compare AREDN and Meshtastic for ham radio mesh networking: how self-healing networks work, licensing questions, hardware, getting started, and what they can do.
Packet Radio for Hams
Packet radio sends data between computers over ham frequencies. Learn how AX.25, TNCs and Direwolf work, what you need to start, and where packet is still used.
What Is DMR in Ham Radio? Digital Voice Explained
DMR is a digital voice standard used on VHF and UHF. Learn how time slots, DMR IDs, color codes and talkgroups work, and whether DMR radios can talk to analog.
What Is IRLP in Ham Radio? Linking Repeaters Over the Internet
IRLP, the Internet Radio Linking Project, links amateur repeaters over the internet. Learn what an IRLP node is, how DTMF connections work, and how it compares.
WSPR Ham Radio: Weak Signal Propagation Reporting
WSPR (pronounced whisper) lets low-power beacons map HF propagation worldwide. Learn how it works, what you need, how to set up WSJT-X and read the reports.
Related topics
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