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FX 4C HF SDR Transceiver 10W Amateur Radio SSB CW AM FM TX 3.5M 29MHz RX 500KHz 50MHz Build In Sound Card For Ham|Radio| - AliExpress
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An introduction to HF Software Defined Radio: SDR for Amateur Radio Operators: Barron ZL3DW, Andrew: 9781500119935: Amazon.com: Books
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