File:Antenna Tuning Unit, 250 KW AM station, 6 tower array.jpg
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![File:Antenna Tuning Unit, 250 KW AM station, 6 tower array.jpg](https://upload.wikimedia.org/wikipedia/commons/thumb/9/9f/Antenna_Tuning_Unit%2C_250_KW_AM_station%2C_6_tower_array.jpg/800px-Antenna_Tuning_Unit%2C_250_KW_AM_station%2C_6_tower_array.jpg?20141021111703)
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Structured data
Captions
Captions
Antenna tuning unit for an AM radio station
Summary
[edit]DescriptionAntenna Tuning Unit, 250 KW AM station, 6 tower array.jpg |
English: The antenna tuner for a 6 tower, 250 kilowatt AM radio station. It is located in a shed called a "helix house" near the antenna towers. The transmitter that produces the radio frequency current to feed the antennas is located further away from the antennas, and the current is fed to the antenna tuner through coaxial cable. From the tuner the electricity is conducted to the antenna towers. The purpose of the antenna tuner is to match the impedance of the feedline to the impedance of the antennas so the power can be fed efficiently to the antennas, and second to feed the power to the antennas with the proper phase so the antenna has the proper radiation pattern to cover the audience areas. |
Date | |
Source | I took this picture while working at the radio station shown. Person shown is myself |
Author | JNRSTANLEY |
Licensing
[edit]I, the copyright holder of this work, hereby publish it under the following licenses:
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Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled GNU Free Documentation License.http://www.gnu.org/copyleft/fdl.htmlGFDLGNU Free Documentation Licensetruetrue |
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File history
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 11:17, 21 October 2014 | ![]() | 1,984 × 1,488 (695 KB) | JNRSTANLEY (talk | contribs) | Uploading a self-made file using File Upload Wizard |
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Metadata
This file contains additional information such as Exif metadata which may have been added by the digital camera, scanner, or software program used to create or digitize it. If the file has been modified from its original state, some details such as the timestamp may not fully reflect those of the original file. The timestamp is only as accurate as the clock in the camera, and it may be completely wrong.
Image title | OLYMPUS DIGITAL CAMERA |
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Camera manufacturer | OLYMPUS OPTICAL CO.,LTD |
Camera model | C300Z,D550Z |
Exposure time | 1/30 sec (0.033333333333333) |
F-number | f/2.9 |
ISO speed rating | 100 |
Date and time of data generation | 21:38, 22 January 2006 |
Lens focal length | 6 mm |
Orientation | Normal |
Horizontal resolution | 72 dpi |
Vertical resolution | 72 dpi |
Software used | v574u-76 |
File change date and time | 21:38, 22 January 2006 |
Y and C positioning | Co-sited |
Exposure Program | Normal program |
Exif version | 2.1 |
Date and time of digitizing | 21:38, 22 January 2006 |
Meaning of each component |
|
Image compression mode | 1 |
APEX exposure bias | 0 |
Maximum land aperture | 3.1 APEX (f/2.93) |
Metering mode | Pattern |
Light source | Unknown |
Flash | Flash fired |
Supported Flashpix version | 1 |
Color space | sRGB |
File source | Digital still camera |
Scene type | A directly photographed image |
Structured data
Items portrayed in this file
depicts
20 October 2014
0.03333333333333333333 second
2.9
6 millimetre
100
image/jpeg
ff7db60c1a9b7bfd9e1f41ee7013f870e5abbe6a
711,598 byte
1,488 pixel
1,984 pixel
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