File:RCAF MorsePracticeBuzzer 1940s.jpg

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Summary

DescriptionRCAF MorsePracticeBuzzer 1940s.jpg	English: A Morse Code practice buzzer from the 1940s. This type of buzzer would have been used by students at a Royal Canadian Air Force Wireless School in World War II. This one was manufactured by the Wilson Company of Toronto, Ontario, Canada. An instruction sheet is glued to the underside of the buzzer and stamped "Approved For Gov't Use". The wristwatch in the photo is there simply to provide a clue to the size of the device. Buzzer courtesy of the Hammond Museum of Radio, Guelph, Ontario, Canada.
Date	27 February 2014, 13:06:45
Source	Own work
Author	J. S. Bond

Camera location	43° 29′ 41.64″ N, 80° 12′ 51.43″ W	View this and other nearby images on: OpenStreetMap	43.494900; -80.214285

Licensing

I, the copyright holder of this work, hereby publish it under the following license:

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File history

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	Date/Time	Thumbnail	Dimensions	User	Comment
current	19:48, 27 February 2014		4,320 × 3,240 (1.37 MB)	SteveTheAirman	User created page with UploadWizard

File usage

The following pages on the English Wikipedia use this file (pages on other projects are not listed):

List of British Commonwealth Air Training Plan facilities in Canada

Metadata

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Camera manufacturer	NIKON
Camera model	COOLPIX L24
Exposure time	1/8 sec (0.125)
F-number	f/3.1
ISO speed rating	125
Date and time of data generation	13:06, 27 February 2014
Lens focal length	6.72 mm
Image title
Width	4,320 px
Height	3,240 px
Bits per component	8 8 8
Pixel composition	RGB
Orientation	Normal
Number of components	3
Horizontal resolution	300 dpi
Vertical resolution	300 dpi
Software used	Adobe Photoshop CS5 Windows
File change date and time	14:37, 27 February 2014
Y and C positioning	Co-sited
Exposure Program	Normal program
Exif version	2.2
Date and time of digitizing	13:06, 27 February 2014
Meaning of each component	Y Cb Cr does not exist
Image compression mode	4
Shutter speed	3
APEX aperture	3.264536
Exposure bias	0
Maximum land aperture	3.3 APEX (f/3.14)
Metering mode	Pattern
Light source	Unknown
Flash	Flash did not fire, compulsory flash suppression
Supported Flashpix version	1
Color space	sRGB
File source	Digital still camera
Scene type	A directly photographed image
Custom image processing	Normal process
Exposure mode	Auto exposure
White balance	Auto white balance
Digital zoom ratio	0
Focal length in 35 mm film	37 mm
Scene capture type	Standard
Scene control	Low gain up
Contrast	Normal
Saturation	Normal
Sharpness	Normal
Subject distance range	Unknown
Date metadata was last modified	09:37, 27 February 2014
Unique ID of original document	A5BAB1D52CB701EE13CFD74B4675BB69
IIM version	45,008

Retrieved from "https://en.wikipedia.org/wiki/File:RCAF_MorsePracticeBuzzer_1940s.jpg"

File:RCAF MorsePracticeBuzzer 1940s.jpg

Summary

Licensing

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copyrighted

copyright license

Creative Commons Attribution-ShareAlike 3.0 Unported

inception

27 February 2014

coordinates of the point of view

43°29'41.6"N, 80°12'51.5"W

source of file

original creation by uploader

MIME type

image/jpeg

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Metadata