Thanks Nino and Marcus for the answer I also get some peaks but no sound just like you on n210 with WBX. I set the gain to 30 and using VHF Armature antenna for 100Mhz. still no sound. the same antenna works with any radio receiver. I have spent plenty of time to get something out of n210 with no success. can you help me on this or show me a working FM example or can you give me the right setting parameters for UHD Source & WBFM receiver blocks on GRC.I have downloaded some UHD examples from internet but not working. By the way, I have put the constant block after WBFM receiver not before as Marcus suggested. Ahmad
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