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2. Predicta - Wikipedia

   en.wikipedia.org/wiki/Predicta

   Philco Predicta from the collection of The Children's Museum of Indianapolis Predicta model 4654 with “barber pole” stand from the collection of the Museum of the Moving Image, New York The Philco Predicta is a black and white television chassis style, which was made in several cabinet models with 17” or 21” screens by the American ...

3. Parabolic antenna - Wikipedia

   en.wikipedia.org/wiki/Parabolic_antenna

   A disadvantage of this type is that the feed and its supports block some of the beam, which limits the aperture efficiency to only 55–60%. [6] Off-axis or offset feed – The reflector is an asymmetrical segment of a paraboloid, so the focus, and the feed antenna, are located to one side of the dish. The purpose of this design is to move the ...

4. Television receive-only - Wikipedia

   en.wikipedia.org/wiki/Television_receive-only

   Television receive-only (TVRO) is a term used chiefly in North America, South America to refer to the reception of satellite television from FSS-type satellites, generally on C-band analog; free-to-air and unconnected to a commercial DBS provider.

5. Utility pole - Wikipedia

   en.wikipedia.org/wiki/Utility_pole

   A utility pole, commonly referred to as a transmission pole, telephone pole, telecommunication pole, power pole, hydro pole, telegraph pole, or telegraph post, is a column or post used to support overhead power lines and various other public utilities, such as electrical cable, fiber optic cable, and related equipment such as transformers and ...

6. Cathode-ray tube - Wikipedia

   en.wikipedia.org/wiki/Cathode-ray_tube

   The size of CRTs increased over time, from 20 inches in 1938, [52] to 21 inches in 1955, [53] [54] 25 inches by 1974, 30 inches by 1980, 35 inches by 1985, [55] and 43 inches by 1989. [56] The world largest was the Sony KX45ED1 at 45 inches but only 1 know working model exists [ 57 ] [ 58 ] However, experimental 31 inch CRTs were made as far ...

7. Stage lighting instrument - Wikipedia

   en.wikipedia.org/wiki/Stage_lighting_instrument

   The number associated with a PAR light (e.g.: Par 64, Par 36, Par 16) indicates the diameter of the lamp in eighths of an inch. [9] Four different beam angles can be obtained on the PAR-64. The beam angle is determined by the lamp. Lamps come in "very narrow" (6° x 12°), "narrow" (7° x 14°), "medium" (12° x 28°), and "wide" (24° x 48°).