Уровень 0 · материалов: 4
В кластер входят документы, посвященные техническим методам и оборудованию для приема радиосигналов различных частот, и не входят документы о пеленгации и обнаружении передатчиков.
Общие признаки: прием радиосигналов, аппаратное обеспечение для радио, короткие, средние, очень низкие частоты, технические руководства для радиолюбителей
Группа выше: Радиолюбительство и радиоприём
Смысл: The text serves as a practical guide for using shortwave radio as a backup method for receiving independent news during times of digital censorship, detailing the necessary hardware and antenna setups required to overcome modern urban interference.
A technical guide on using shortwave receivers and specialized antennas to access alternative news sources during internet censorship.
Смысл: The text is a technical project diary demonstrating that Medium Wave radio reception is still possible in modern cities using a carefully constructed direct amplification receiver with low-noise components.
A hobbyist builds a high-quality analog MW radio receiver using low-noise op-amps and salvaged vintage parts to prove that AM radio is still receivable in urban Moscow.
Смысл: The text provides two methods (one hardware-based and one software-based) to enable the reception of Shortwave (HF) frequencies on a standard RTL-SDR dongle without the need for an external converter.
A technical guide on how to modify an RTL-SDR dongle via hardware soldering or software patching to enable shortwave radio reception.
Смысл: The main idea is to demonstrate that capturing VLF/ELF radio signals is accessible to hobbyists using basic electronics, a laptop, and specific software, while explaining the fundamental physics of the antenna and the challenges of noise interference.
A DIY guide on building a simple VLF/ELF radio receiver using a loop antenna, a transistor amplifier, and a laptop with signal analysis software.