If you are north of Laurens Rd. you should be able to receive WBTV from Charlotte with a good UHF antenna and amplifier. I got a very strong signal with an attic antenna when I lived off Butler Rd. near Mauldin. Full 10 bars. 3.3 is the new Circle channel that features country music programming. But if trees or hills block the reception path to the northeast it may be problematic.It's a role of the dice. Channel 3 is out of Charlotte. I used to get it on rare occasion near Furman, but haven't been able to get it for almost two months even with an outdoor antenna. Granted, none of the predictors say I should be able to get it. Put your indoor antenna at/near a window facing in the general direction of Charlotte. Good luck.
A good UHF antenna is the Clearstream 4MAX sold at Best Buy. You may need to add an amplifier. Also a good indoor antenna is the Antop 800SBS with an indoor stand and built in amplifier.
WBTV-3 is the strongest Charlotte signal, although WJZY FOX-46 is still working on upgrading their repack signal to full power. When this happens it should be similar coverage area to WBTV, according to the coverage maps.