What rods are you using? What amps? 6011 works better on AC than 6010, 7018AC works better than 7018. Have you tried playing with your amps? Maybe you could post a picture of your welds for us to look at. I never used a buzzbox but if you can switch the polarity it would help.
hi, if the welder you have is AC only then your not welding in electrode negative (straight) and your not welding in electrode positive (reverse) either. you are bouncing back and forth between the two. hence AC. there are electrodes designed for AC welding. Good luck.