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I just want to listen to MW and SW. But i have heard of that you need a upconverter. Do you really need that or is it just for perfection? I am going to listen from 1000 kHz to around 20-30 MHz. I am talking about the version 3.0
With a our RTL-SDR Blog V3, you don't need an upconverter as you can use direct sampling mode. But an upconverter could get you better RX performance especially if you have strong interfering signals.