The term 'OLD TV PART' can be broken down into four crossword solutions: DIAL (4 letters), Triode (6 letters), KNOB (4 letters), and Picturetube (11 letters). A DIAL is a device used to adjust the frequency of a radio or television, typically found on the front of the device. A triode is an electronic device consisting of three electrodes, used in amplifying signals. A KNOB is a circular handle used to control the settings of a device, such as the volume or brightness of a television. Finally, a picturetube is a vacuum tube used to display images on a television screen.