A clamp for securing a printed circuit board on a cathode ray tube, in which the clamp has a split ring with overlapping jaws and teeth on each end of the jaws, wherein the jaws and teeth are adapted to engage and hold the clamp on the cathode ray tube, and wherein the clamp has an stand-off which is adapted for removably securing a printed circuit board on but spaced apart from the cathode ray tube. The split ring may be connected to but independent from the standoff so that movement of the clamp will not affect the position of the stand-off.