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Version 0.7 of Open Tuner, released on April 27, 2023, marked a significant milestone by introducing proof-of-concept dual tuner functionality for the BATC Minitiouner. This C# client, inspired by Heather Lomond's _Longmynd_ project, aims to leverage both tuners and demodulators within the NIM module, a capability crucial for advanced Digital Amateur Television (DATV) operations on QO-100 and terrestrial links. My own experience with DATV often involves juggling multiple receive paths, so a unified client like this simplifies the workflow considerably. Further enhancing its utility, version 0.9 (February 11, 2024) integrated support for the Raspberry Pico, utilizing Colin (G4EML)'s _PicoTuner_ firmware. This offers a more accessible and cost-effective alternative to the traditional FTDI module, streamlining dual tuner setups with a single USB cable. The project's evolution reflects a practical approach to overcoming hardware availability challenges. The software is developed using Visual Studio 2019/2022 and .NET Framework 4.7.2, requiring specific Nuget packages like VLC/Websocket and an ffmpeg folder for full operation. It's an active, community-driven effort, with the source code openly available on GitHub for contributions and bug reporting, embodying the collaborative spirit of amateur radio development.

This guide details how to set up an OpenWebRX software defined radio (SDR) receiver using an RTL-SDR V4 dongle on a Raspberry Pi or similar small computer. The resulting SDR receiver is accessible via a web interface, featuring a live waterfall display and demodulation for AM, FM, SSB, and CW. It can be configured for public sharing or private network use. The RTL-SDR V4 dongle offers direct sampling improvements for HF, a tuning range of approximately 500 kHz to 1.7 GHz (covering HF, VHF, UHF, and microwave amateur allocations), improved front-end filtering, and a built-in software-switchable bias tee. The guide covers two installation methods for OpenWebRX: using an official Raspberry Pi image or a Docker installation. It also provides recommendations for Raspberry Pi models (3/3B+, 4, Zero 2 W), antenna and placement tips, and troubleshooting common issues. OpenWebRX is an open-source, browser-based SDR software package.