so ive been running an RTL-SDR v3 for about a year now, mostly just poking around on airband and occasionally looking at ACARS and ADS-B and whatever else catches my eye. its been a great little dongle for the price but im starting to feel the limitations, mostly on the lower HF stuff where the direct sampling mod only gets you so far.

ive been going back and forth between picking up an SDRplay RSPdx or just jumping straight to a HackRF One. the price gap isnt huge if you consider what youre getting but theyre pretty different animals from what i can tell. the SDRplay seems more like a serious receiver and the HackRF is more of a do-everything swiss army knife thing but not quite as sensitive on receive. is that a fair read on it? im not planning to transmit anything with it, i just want better dynamic range and actual coverage down to like 1khz or whatever the RSPdx specs say.

also running SDR# right now on windows and wondering if ill have driver headaches switching to either of these. ive heard the SDRplay API is pretty solid but the HackRF on windows can be a bit of a pain depending on the software. anyone gone through this comparison recently?

your read is pretty much right. if you just want to receive and you want it to actually work well out of the box, the RSPdx is going to frustrate you way less. the HackRF is cool but its a 8-bit ADC and you really do feel that in crowded band conditions. the SDRplay units use a proper 14-bit frontend and the difference in dynamic range is noticeable, especially anywhere near broadcast AM or any strong local signals.

i had a HackRF for about 8 months before i got an RSP2 and honestly the HackRF just collected dust after that except when i needed the TX side for something. for pure monitoring the SDRplay wins without question in my opinion. SDRuno is the native software and its gotten a lot better, kind of cluttered interface but once you learn where everything is its fine. you can also use it with HDSDR or CubicSDR if you prefer those.

yeah the windows driver thing with HackRF is real, you basically have to use Zadig to swap in the WinUSB driver and then some software plays nice and some doesnt. its not terrible once you do it once but if you reinstall windows or plug it into another machine you gotta remember all that again. SDRplay honestly just works, their driver installer is pretty painless.

one thing nobody mentioned — if youre doing HF seriously you might also want to think about what antenna youre feeding it. even the best SDR front end gets hurt by a bad noise floor at the antenna side. i was chasing my tail with front end comparisons for weeks before i realized half my problem was RF coming in on the USB cable. ferrite on the USB helped more than i expected actually.