File:Alexandersson1.JPG
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Alexanderson alternator, an antique type of radio transmitter, placed in the radio station in Grimeton near Varberg, Sweden.
Alexanderson-alternator (roterande högfrekevensgenerator), placerad i stationshuset på radiostationen i Grimeton.
Summary
[edit]DescriptionAlexandersson1.JPG |
English: Alexanderson alternator an antique type of radio transmitter, placed in the main building of the Varberg radio station in Grimeton near Varberg, Sweden. This was a specialized AC electric generator which turned at an extremely high rate, generating radio waves. They were used between 1906 and the mid 1920s in very low frequency (VLF) radio stations, mostly operated by governments and navies, to broadcast long distances. They were very expensive, inefficient, and finicky to adjust, and were mostly replaced by vacuum tube transmitters by the 1930s.
Svenska: Alexanderson-alternator (roterande högfrekevensgenerator), placerad i stationshuset på radiostationen i Grimeton. |
Date | |
Source | Own work |
Author | Dagjoh |
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 16:52, 26 July 2010 | 2,304 × 1,728 (960 KB) | Dagjoh (talk | contribs) | {{Information |Description={{en|1=Alexandersson-alternator (rotating highfrequency-generator), placed in the main building of the Grimeton radio station in Varberg, Sweden.}} {{sv|1=Alexandersson-alternator (roterande högfrekevensgenerator), placerad i s |
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Camera manufacturer | CASIO COMPUTER CO.,LTD. |
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Camera model | EX-Z270 |
Exposure time | 1/60 sec (0.016666666666667) |
F-number | f/2.6 |
ISO speed rating | 100 |
Date and time of data generation | 12:03, 26 July 2010 |
Lens focal length | 4.65 mm |
Orientation | Normal |
Horizontal resolution | 72 dpi |
Vertical resolution | 72 dpi |
Software used | 1.00 |
File change date and time | 12:03, 26 July 2010 |
Y and C positioning | Co-sited |
Exposure Program | Normal program |
Exif version | 2.21 |
Date and time of digitizing | 12:03, 26 July 2010 |
Image compression mode | 2.880658436214 |
APEX exposure bias | 0 |
Maximum land aperture | 2.8 APEX (f/2.64) |
Metering mode | Pattern |
Light source | Unknown |
Flash | Flash did not fire, compulsory flash suppression |
Color space | sRGB |
Custom image processing | Normal process |
Exposure mode | Auto exposure |
White balance | Auto white balance |
Focal length in 35 mm film | 28 mm |
Scene capture type | Standard |
Contrast | Normal |
Saturation | Normal |
Sharpness | Normal |