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Longwave Loggings / Re: SDR Receivers Useful For MW/LW
« on: July 15, 2019, 1836 UTC »This will certainly be nice for prototyping, as I might even get away with some bodge wires and standard probing techniques.
Right.
Of course, the receiver won't work above 1 Mhz, (undersampling really isn't an option with this part) But I decided to take the high frequency hit due to the relative abundance of good SDRs for hf and vhf frequencies, and the relative paucity of ones that work down to DC.
Yes, but as you say there are plenty of other good options for the MF and HF ranges.
Heres hoping that a DC coupled 1 MHz receiver will be a hit with the www.vlf.it guys, NDB dxers, and all the rest of us down here in the mud
Once you get something working, I would be interested to know if the performance you get is better than an HF receiver, or perhaps an SDR, with a mixer ("transverter") in front of it. That would be my benchmark to compare to, if I were doing this.
Unless you are committed to the "intellectual challenge" of designing and making your own, which is a perfectly worthy endeavour, you may want to save yourself some work and get the evaluation board for the AD7760: https://www.analog.com/en/design-center/evaluation-hardware-and-software/evaluation-boards-kits/eval-ad7760.html#eb-relatedhardware
If you are committed, you can also get their evaluation board gerber files at the link above, which you will likely find helpful.
