The hardware being explored here is just a tiny example of what can be utilized. Matching up a Proscan Android 7" Tablet, to a UHF/VHF/HF RTL-SDR Tuner Receiver to receive FM Radio is a snap, but that's just the tip of the iceberg. It's not just local Broadcast stations, the set-up potentially can tune in ANYTHING in the UHF & VHF part of the radio spectrum. Adding a tuned antenna other than the one that comes stock, tuned for Broadcast FM, you'll have a capable portable receiver for a huge part of the radio spectrum. Being that it's done on a portable Android Tablet demonstrates practicality & portability in spades.
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One of best places to learn more about SDR's is RTL.SDR.com a continually updated clearinghouse of everything SDR. From there you can unleash your inner geek learning about cutting edge SDR circuits, test new apps and software plug-ins that unleash more features and new applications.