Modern, cross-platform amateur radio logging.

⚠️ Alpha software — SDRLoggerPlus is under active development. Features may change and bugs are expected.

SDRLoggerPlus is a desktop amateur radio logger for Windows, macOS, and Linux. It pairs a fast .NET backend with a React UI of drag-and-drop, dockable panels so you can lay out exactly the station dashboard you want — logbook, DX cluster, maps, award progress, rig and rotator control, and more, all updating in real time.

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Logging

• Dockable, drag-and-drop panel layout (FlexLayout) with saved workspaces
• Quick log entry with live callsign lookup, plus a full searchable logbook/history
• ADIF import and export, and an ADIF file monitor that auto-imports new QSOs from external programs
• QRZ.com profile lookups and callsign images

DX spotting & alerts

• Real-time DX cluster (telnet) with new-DXCC / new-band / worked spot status
• Reverse Beacon Network (RBN) with band-opening alerts and voice announcements
• spothole.app spot source feeding the same dedup pipeline
• DXpeditions and DX news panels
• Hot List with text-to-speech alerts; ITU out-of-band warnings

Maps & visualization

• Interactive 2D map and a 3D globe with great-circle beam headings to the focused DX
• Panadapter and meter panels driven by TCI (Thetis / SunSDR) spectrum and audio

Awards & statistics

• Award tracking for DXCC, WAS, WAZ, WPX, WAC, 5BWAS, 5BDXCC, VUCC, POTA, and IOTA
• Per-band / per-mode detail with filtering

Radio & station control

• CAT control via Hamlib (bundled)
• TCI radio control (Lyra / Thetis / SunSDR) with panadapter and meters
• Lyra Combo Link — two-way link with the Lyra SDR console over TCI: band / mode / frequency sync, spot push with click-to-tune, and CW logging with call + RST

Digital & online services

• WSJT-X / JTDX auto-logging (two independent UDP sources)
• LoTW upload (via TQSL), Club Log realtime, HRDLog, and PSK Reporter

Satellite & propagation

• CSN S.A.T. controller integration and satellite tracking
• Propagation, solar, aurora, and space-weather panels

Station weather

• Severe-weather alerts from NWS, plus Ambient Weather and Ecowitt personal weather stations

Contesting & productivity

• Contest logging panel
• AI talk points (OpenAI or Anthropic) for conversational prompts
• Scheduled automatic backups; settings export / import

• .NET SDK 10 (pinned in global.json)
• Node.js (LTS) for the web and desktop projects
• Hamlib is bundled with desktop builds for rig control

SDRLoggerPlus ships as a desktop app (Windows NSIS installer, macOS DMG, Linux AppImage). Download the latest build from the Releases page, or run it from source (below) or build a package with npm run package:<platform>.

Run the three pieces in separate terminals for instant hot reload:

# Backend API
cd src/SDRLoggerPlus.Server && dotnet run

# Frontend (Vite hot reload)
cd src/SDRLoggerPlus.Web && npm install && npm run dev

# Desktop shell
cd src/SDRLoggerPlus.Desktop && npm install && npm run dev:vite

Vite serves the UI at http://localhost:5173 and proxies /api and /hubs to the backend. See CLAUDE.md for the full development, packaging, and testing guide.

# Backend unit tests
dotnet test src/SDRLoggerPlus.Server.Tests --filter "Category=Unit"

# Frontend tests
cd src/SDRLoggerPlus.Web && npm test

User data lives in your OS application-data folder under SDRLoggerPlus (%APPDATA%\SDRLoggerPlus on Windows, ~/Library/Application Support/SDRLoggerPlus on macOS, ~/.config/SDRLoggerPlus on Linux). On first run, an existing QSOThief installation is automatically copied over (copy, not move — the original is left as a safety net).

• Lead developer: Rick Langford (N8SDR) — creator of SDRLogger+.
• Contributor: Brent Crier (N9BC) — cross-platform .NET / React / Electron edition.

It builds on the work of two earlier projects:

• Log4YM by Brian Keating (EI6LF) — the original codebase, released into the public domain (Unlicense). This edition began as a fork of Log4YM v1.6.2.
• SDRLogger+ by Rick Langford (N8SDR) — the project this logger continues; origin of the awards rules, weather alert tiers, CSN S.A.T. handling, Hot List, and scheduled-backup designs.

MIT License — © 2026 Rick Langford (N8SDR) and contributors. See LICENSE. Bundled Hamlib and libusb are LGPL-2.1; see THIRD-PARTY-NOTICES.txt.