Homebrew SDR mcHF transceiver

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Bocina rusa uvb-76 sintonizada en ! Russian buzzer tuned in 40 mt!

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Homebrew HF upconverter + rtl-sdr + Longwire 10m bandscan.

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Самодельный конвертер // Homebrew RTL SDR Upconverter for JLCPCB , радиосвязь, радиолюбители

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Homebrew RTL-SDR upconverter: physical construction

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Homebrew SDR mcHF transceiver