I guess I would be interested to know if you are getting the cracking sound on any other frequencies such as Fairfax County Police (I don’t know if you can pick that up in Leesburg) which is why I suggested trying the scanner out in other locations. If you are only getting this noise with the Loudoun County law enforcement talk groups then I would suspect it may be a simulcasting issue. A while back there was a Loudoun County Sheriff live feed on Radio Reference and I noticed that the feed also had a “cracking sound”. I spent a lot of time last night reading the Uniden X36 Phase II TDMA Voice Decoding Performance Thread which is under the Uniden Scanner forum and the quality of the Voice Decoding is a hot topic so you may want to check that out and post questions there. That said if Uniden will exchange the scanner then sure, why not however do not be disappointed if you find the new scanner has the same issue (I really hope it does not). Good luck.