As an afterthought, Nevo had issues with NC50 antennas for awhile, when it first came out and did offer swap outs of those antennas on the NC50 for free. This goes back 1-2 years but I guess it is possible that the unit you have might be an older in-stock distribution product and maybe the antenna is bad? That will certainly kill your RF performance.

If you cannot get a replacement antenna you might try some of the external antenna solutions on the market which allow the NC50 antenna jack to be extended via a shielded wire and use other third party extended antenas.

Dave
RemoteQuest.com