File:Blythe House Science Museum stores tour 99.JPG
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Blythe House Science Museum stores tour 99.JPG
Original file (5,184 × 3,456 pixels, file size: 5.87 MB, MIME type: image/jpeg)
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Summary
| DescriptionBlythe House Science Museum stores tour 99.JPG |
English: A British radio transmitter from the early 1920s, used for some of the first radio broadcasts by the British Broadcasting Corporation (BBC). The four early power triode valves (vacuum tubes) used in parallel look similar to 4 kW Marconi MT1 valves, developed by Marconi Co. engineer H. L. Round, which operated with 12,000 volts on the plate (anode). Blythe House Science Museum stores tour, London |
| Date | |
| Source | Own work |
| Author | John Cummings |
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Captions
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4 kW AM Radio Transmitter, BBC, Blythe House, 1920s
Items portrayed in this file
depicts
some value
3 April 2013
image/jpeg
0.04 second
3.5
18 millimetre
3,200
662d9e4dacd08c4329bae9b5d28fac20c91b1dee
6,151,276 byte
3,456 pixel
5,184 pixel
File history
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 19:21, 3 April 2013 | No thumbnail | 5,184 × 3,456 (5.87 MB) | wikimediacommons>John Cummings | User created page with UploadWizard |
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Metadata
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| Camera manufacturer | Canon |
|---|---|
| Camera model | Canon EOS Kiss X4 |
| Exposure time | 1/25 sec (0.04) |
| F Number | f/3.5 |
| ISO speed rating | 3,200 |
| Date and time of data generation | 11:01, 3 April 2013 |
| Lens focal length | 18 mm |
| Orientation | Normal |
| Horizontal resolution | 72 dpi |
| Vertical resolution | 72 dpi |
| File change date and time | 11:01, 3 April 2013 |
| Y and C positioning | Co-sited |
| Exposure Programme | Not defined |
| Exif version | 2.21 |
| Date and time of digitising | 11:01, 3 April 2013 |
| Meaning of each component |
|
| APEX shutter speed | 4.625 |
| APEX aperture | 3.625 |
| APEX exposure bias | 0 |
| Metering mode | Centre weighted average |
| Flash | Flash did not fire, compulsory flash suppression |
| DateTime subseconds | 61 |
| DateTimeOriginal subseconds | 61 |
| DateTimeDigitised subseconds | 61 |
| Supported Flashpix version | 1 |
| Colour space | sRGB |
| Focal plane X resolution | 5,728.1767955801 |
| Focal plane Y resolution | 5,808.4033613445 |
| Focal plane resolution unit | inches |
| Custom image processing | Normal process |
| Exposure mode | Auto exposure |
| White balance | Auto white balance |
| Scene capture type | Standard |