Microphone

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Ingenium, 1985.0509.001
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OBJECT TYPE
DYNAMIC & RIBBON VELOCITY/UNIDIRECTIONAL
DATE
1939
ARTIFACT NUMBER
1985.0509.001
MANUFACTURER
Western Electric
MODEL
639A
LOCATION
United States of America

More Information


General Information

Serial #
743
Part Number
1
Total Parts
1
AKA
N/A
Patents
N/A
General Description
CASE, CAST ALUMINUM OR WHITE METAL/ INTERNAL CONSTRUCTION, MAGNETS, CORRUGATED RIBBON ELEMENT, DIAPHRAGM AND VOICE COIL, EQUALIZERS, TRANSFORMERS, ETC./ CASE: SYNTHETIC WITH METAL ZIPPER

Dimensions

Note: These reflect the general size for storage and are not necessarily representative of the object's true dimensions.

Length
21.9 cm
Width
11.2 cm
Height
9.1 cm
Thickness
N/A
Weight
N/A
Diameter
N/A
Volume
N/A

Lexicon

Group
Communications
Category
Sound
Sub-Category
N/A

Manufacturer

AKA
Western Electric
Country
United States of America
State/Province
Unknown
City
Unknown

Context

Country
Canada
State/Province
Unknown
Period
1940-1965 (APPROX)
Canada
PLEASE SEE HISTORY OF CRAWLEY FILMS LTD. IN SUPP. INFO.
Function
USED TO PICK UP SOUND SUCH AS VOICE AND MUSIC AND CONVERT TO COMPLEX ALTERNATING CURRENT. THE CURRENT TO BE AMPLIFIED AND TRANSMITTED WITH THE TELEVISION VIDEO.
Technical
A UNIQUE STEP IN THE DEVELOPMENT OF DIRECTIONAL MICROPHONES. OTHER MANUFACTURERS QUICKLY DEVELOPED SIMILAR MICROPHONES.
Area Notes
Unknown

Details

Markings
'Western Electric' IN RED ON PLATE ATTACHED TO BODY/ 'WESTERN ELECTRIC MADE IN U.S.A. 639A 743' IN CIRCLE AROUND ATTACHMENT/ 'CDA' IN RED ABOVE SCREW ON BODY/ 'USE 'C' OR 'D' POSITIONS ONLY' HANDWRITTEN IN BLUE INK ON ADHESIVE TAPE ATTACHED TO BODY/ 'WESTERN ELECTRIC/ MADE IN U.S.A.' ON CASE
Missing
PART OF VERTICAL GRILL ON FRONT OFCASE BROKEN OFF/ NICKLE PLATED TRIM STRIP CRACKED AT TOP RIGHT REAR
Finish
BLACK METAL BODY/ SILVER-COLOURED TRIM/ DEEP PURPLE COLOURED FABRIC/ TEXTURED BAND ON ATTACHMENT IS PAINTED YELLOW.
Decoration
TWO CHROME STRIPS WITH RED DETAIL CIRCLES THE TOP AND BOTTOM OF THE CASE/ A SMALLER STRIP CIRCLES THE MOUNTING TUBE

CITE THIS OBJECT

If you choose to share our information about this collection object, please cite:

Western Electric, Microphone, circa 1939, Artifact no. 1985.0509, Ingenium – Canada’s Museums of Science and Innovation, http://collection.ingeniumcanada.org/en/id/1985.0509.001/

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