File:2008-07-28 Mast radiator.jpg
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editDescription2008-07-28 Mast radiator.jpg |
English: A mast radiator antenna for an AM radio station transmitter in Chapel Hill, North Carolina. The radio frequency current from the transmitter is applied directly to the steel lattice tower, which acts as a monopole antenna element. The tower is supported at its base by a massive porcelain insulator, which insulates it from the ground. The high voltage on the tower can deliver a dangerous shock to anyone that touches it, so it is surrounded by a fence to keep people out. The white shed is called a helix house and contains an antenna tuner matching network to match the impedance of the antenna to the transmitter to allow power to be transferred efficiently to the antenna. The mast is supported by guy wires (faint), which have strain insulators in them to prevent the high voltage on the tower from being conducted to ground. |
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Date | |||
Source | Own work | ||
Author | Ildar Sagdejev (Specious) | ||
Permission (Reusing this file) |
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Camera location | 35° 56′ 16.32″ N, 79° 01′ 36.78″ W | View this and other nearby images on: OpenStreetMap | 35.937867; -79.026882 |
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editI, the copyright holder of this work, hereby publish it under the following licenses:
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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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 05:35, 8 October 2008 | 2,553 × 3,830 (2.63 MB) | Specious (talk | contribs) | {{Information |Description={{en|A mast radiator in Chapel Hill, North Carolina.}} |Source=Own work |Author=Ildar Sagdejev (Specious) |Date=2008-07-28 |Permission={{User:Specious/Ref}} |
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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.
Camera manufacturer | Canon |
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Camera model | Canon EOS DIGITAL REBEL XTi |
Exposure time | 1/100 sec (0.01) |
F-number | f/14 |
ISO speed rating | 100 |
Date and time of data generation | 16:24, 28 July 2008 |
Lens focal length | 18 mm |
Orientation | Normal |
Horizontal resolution | 72 dpi |
Vertical resolution | 72 dpi |
Software used | GIMP 2.4.6 |
File change date and time | 01:30, 8 October 2008 |
Y and C positioning | Co-sited |
Exposure Program | Aperture priority |
Exif version | 2.21 |
Date and time of digitizing | 16:24, 28 July 2008 |
Meaning of each component |
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APEX shutter speed | 6.6438598632812 |
APEX aperture | 7.6147155761719 |
APEX exposure bias | 0 |
Metering mode | Pattern |
Flash | Flash did not fire, compulsory flash suppression |
Supported Flashpix version | 1 |
Color space | sRGB |
Focal plane X resolution | 4,433.2953249715 |
Focal plane Y resolution | 4,453.6082474227 |
Focal plane resolution unit | inches |
Custom image processing | Normal process |
Exposure mode | Auto exposure |
White balance | Manual white balance |
Scene capture type | Standard |