I got this receiver in trade. It was listed as a model FA-3000x, but I noticed today that the dial glass says FA-3000. I can't find any info on the web about a model FA-3000 non-x. There are a couple letters missing in the "Award Series" printed on the glass, so it may be that the x is just worn off. Does anyone know if they made such a beast, and what the differences are?