File:Sharp Optonica SA-2121H receiver dial lighting 02.jpg
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Captions
Summary
[edit]DescriptionSharp Optonica SA-2121H receiver dial lighting 02.jpg | Sharp Optonica SA-2121H receiver (Euro market, made in 1978) on the bench. Needed just a small repair in protection relay circuit, otherwise fully functional after 40 years. Here is the lighting for the radio dial (underexposed to reveal 'the secret'). Six fuze-shaped lightbulbs illuminate the edge of a long, angled plexiglass bar which serves as a lightguide. Most light is lost in transit, but a small fraction reaches the other edge of the bar, producing very even, diffused lighting of the dial. |
Source | Own work |
Author | Retired electrician |
Licensing
[edit]This file is made available under the Creative Commons CC0 1.0 Universal Public Domain Dedication. | |
The person who associated a work with this deed has dedicated the work to the public domain by waiving all of their rights to the work worldwide under copyright law, including all related and neighboring rights, to the extent allowed by law. You can copy, modify, distribute and perform the work, even for commercial purposes, all without asking permission.
http://creativecommons.org/publicdomain/zero/1.0/deed.enCC0Creative Commons Zero, Public Domain Dedicationfalsefalse |
Annotations InfoField | This image is annotated: View the annotations at Commons |
Grounding contact for the lid
File history
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 01:15, 23 January 2020 | 3,456 × 3,456 (1.83 MB) | Retired electrician (talk | contribs) | {{Information |Description=Sharp Optonica SA-2121H receiver (Euro market, made in 1978) on the bench. Needed just a small repair in protection relay circuit, otherwise fully functional after 40 years. Here is the lighting for the radio dial (underexposed to reveal 'the secret'). Six fuze-shaped lightbulbs illuminate the edge of a long, angled plexiglass bar which serves as a lightguide. Most light is lost in transit, but a small fraction reaches the other edge of the bar, producing very even,... |
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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 REBEL SL1 |
Exposure time | 3/10 sec (0.3) |
F-number | f/8 |
ISO speed rating | 100 |
Date and time of data generation | 03:53, 23 January 2020 |
Lens focal length | 85 mm |
Orientation | Normal |
Horizontal resolution | 300 dpi |
Vertical resolution | 300 dpi |
Software used | DxO PhotoLab 2.1 |
File change date and time | 03:53, 23 January 2020 |
Exposure Program | Aperture priority |
Exif version | 2.3 |
Date and time of digitizing | 03:53, 23 January 2020 |
Meaning of each component |
|
APEX shutter speed | 1.625 |
APEX aperture | 6 |
APEX exposure bias | −0.66666666666667 |
Subject distance | 1.05 meters |
Metering mode | Pattern |
Flash | Flash did not fire, compulsory flash suppression |
DateTime subseconds | 64 |
DateTimeOriginal subseconds | 64 |
DateTimeDigitized subseconds | 64 |
Supported Flashpix version | 1 |
Color space | sRGB |
Focal plane X resolution | 5,798.6577181208 |
Focal plane Y resolution | 5,788.9447236181 |
Focal plane resolution unit | inches |
Custom image processing | Normal process |
Exposure mode | Auto exposure |
White balance | Auto white balance |
Scene capture type | Standard |
GPS tag version | 0.0.3.2 |
Rating (out of 5) | 0 |