Vintage 1990's Magnavox Projector Screen TV (3) CRT Mini Picture Tubes for Model 180BRB22 Red,Green,Blue.Vintage 1990's Magnavox Projector Screen TV (3) CRT Mini Picture Tubes for Model 180BRB22 Red, Green, Blue All tubes are in there original factory box and they were never used. New Old Stock Big Screen Picture Tubes. Material: Glass and metal. Tubes Measure: 11" Long and the picture tube has a 6" Screen. Part numbers of off the tubes: (1) 330285-3(Green tube) (2) 330285-2(Red Tube) (3) 330285-1(Blue Tube) Vintage Magnavox 3 Crt picture tubes red, green and blue / Hitachi Part# 180BRB22 -red-green-blue picture tubes. Magnavox Part Numbers From Factory Boxes: 483515127003, 483515127004, 483515127005 Pictures Tubes work in Models: RJ8510AK2, RK8548AKO2, RK8510AQK and may work in other models. Vintage item / New old stock item. 3 small CRT tubes that are in there original factory boxes with instructions. Do not no if these tubes will ever be used in a big screen TV because they are outdated Unless someone out there in this big world still needs these 3 little tubes for there big screen Tv or they can be a great collectable Item. ABOUT: In the beginning, video projectors and projection TVs employed CRT technology, which you can think of as very small TV picture tubes. Three tubes (red, green, blue) supplied both the needed light and image detail. Each tube projected onto a screen independently. In order to display a full range of colors, the tubes had to be converged. This meant that the color mixing actually took place right on the screen and not inside the projector. The problem with tubes was not only the need for convergence to preserve the integrity of the projected image if one tube fades or fails, but also that all three tubes had to be replaced so that they all projected color at the same intensity. The tubes also ran very hot and needed to be cooled by a special gel or liquid. To top it off, both CRT projectors and projection TVs consumed a lot of power. Functional CRT-based projectors are now very rare. Tubes have since been replaced with lamps, combined with special mirrors or color wheels that separate the light into red, green, and blue, and a separate aimaging chipa that provides the image detail. Depending on the type of imaging chip used (LCD, LCOS, or DLP), the light coming from the lamp, mirrors, or color wheel, has to pass through or reflect off of the imaging chip, which produces the picture you see on the screen. LCD HISTORY: The first digital-projection technology was LCD (liquid crystal display). It was conceived by Gene Dolgoff in 1968, but LCD technology was not sufficiently developed to be practical in a projector at the time; that would have to wait until the mid-1980s. The basic idea is relatively simple. White light from a lamp is split into red, green, and blue components using dichroic mirrors, which reflect certain wavelengths and pass other wavelengths. These three mirrors convert the white light into the red, green, and blue primary colors from which all colors can be derived ITEM ID65 ITEM TYPE Vintage COLOR Clear, Gray, Red Have any questions please ask ?Box or package may not be in the best condition. Have Question Just Ask? Listing and template services provided by inkFrog