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Two iconoscope tubes. The type 1849 (top) was the common tube used in studio television cameras. The camera's lens focused the image through the tube's transparent "window" (right) and onto the dark rectangular "target" surface visible inside. The type 1847 (bottom) was a smaller version.
Only one tube was used in the camera, instead of a tube for each color, as was standard for color cameras used in television broadcasting. It is used mostly in low-end consumer cameras, such as the HVC-2200 and HVC-2400 models, though Sony also used it in some moderate cost professional cameras in the 1970s and 1980s, such as the DXC-1600 series.
Later thermionic vacuum tubes, mostly miniature style, some with top cap connections for higher voltages. A vacuum tube, electron tube, [1] [2] [3] [thermionic] valve (British usage), or tube (North America) [4] is a device that controls electric current flow in a high vacuum between electrodes to which an electric potential difference has been applied.
DuMont had developed an improved version of the cathode-ray tube which was both cheaper to produce and longer-lasting than the typical German tubes in use– the imported tubes had a life of 25 to 30 hours. DuMont's invention of the first long-lasting cathode-ray tube made television commercially viable.
3 – Tube used in TV broadcasting equipment; 4 – Tube for radiocommunication equipment with unbalanced modulation; 5 – Modulator or pulse tube; The second digit after the "/" is sequentially assigned. Examples: Q01 – Power tetrode up to 125 MHz, 0.1 kW (=100 W) Q3.5 – Power tetrode up to 220 MHz, 3.5 kW
In 2012, Samsung SDI and several other major companies were fined by the European Commission for price fixing of TV cathode-ray tubes. [75] The same occurred in 2015 in the US and in Canada in 2018. [76] [77] Worldwide sales of CRT computer monitors peaked in 2000, at 90 million units, while those of CRT TVs peaked in 2005 at 130 million units ...
This was to be done by using cathode-ray tubes (CRTs) at both the transmitting and receiving ends. The photoelectric screen in the proposed transmitting device was a mosaic of isolated rubidium cubes. [9] [10] This was the first iteration of the electronic television which is still in use today. When Swinton gave his speech others had already ...
400 kW klystron used for spacecraft communication at the Canberra Deep Space Communications Complex. This is a spare in storage. 5 kW klystron tube used as power amplifier in UHF television transmitter, 1952. When installed, the tube projects through holes in the center of the cavity resonators, with the sides of the cavities making contact ...