The Ikegami HL-33, the RCA TKP45 and the Thomson Microcam were portable two piece color cameras introduced in the early 1970s. For field work a separate VTR was still required to record the camera's video output. Typically this was either a portable 1" reel to reel VTR, or a portable 3/4" U-matic VCR. Typically, the two camera units would be carried by the camera operator, while a tape operator would carry the portable recorder. With the introduction of the RCA TK76 in 1976, camera operators were finally able to carry on their shoulders a one piece camera containing all the electronics to output a broadcast quality composite video signal. A separate videotape recording unit was still required.