His first assignment was to develop an electron multiplier to go with the Image Orthicon. The station's two studios shared two DuMont TA-142 Image Orthicon monochrome camera chains. KQTV had one very large General Electric black & white image orthicon TV Camera. Up to 1962, television studios used 3-tube image orthicon cameras for programmes in colour. The image orthicon (sometimes abbreviated IO), was common in American broadcasting from 1946 until 1968.