A buzz box is a high frequency generater that is used to jump the gap usually used on tig units to help strike the arc. they are also frequently used on better arc welders to help strike the arc as well.
The reasone they buzz is they create extreamly high frequence AC that can jump several inches between torch and weld object. These units are WAY easier to use than NON-buzz box units. As the NON-buzz box unit require you to stike the arc and have the possiblity of sticking(or welding) the electrode to the work piece.
my 2cents
thanks
Michael T.
"If you don't stand for something, chances are, you'll fall for anything!"