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My next receiver will be an SDR. Eliminating all but one conversion stage (since the SDR goes straight from RF to I/Q baseband) and doing all the filtering and demodulation with perfect mathematical accuracy in software not only gives you tremendous dynamic range and filtering capability, but it makes the recovered audio almost supernaturally clean-sounding. Listening to a good SDR into a high-fidelity sound system for the first time is like discovering that pillows had been strapped to your speakers, and gravel had been stuck to your voice coil, for all these years -- and finally removing them. The SDRs I have seen have been mickey mouse affairs that used sound cards for demod. But when a good standalone unit is offered at a reasonable price I will give it a try. |
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