Monitor, amplitude modulation
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1986.0541.001
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- OBJECT TYPE
- N/A
- DATE
- 1945–1957
- ARTIFACT NUMBER
- 1986.0541.001
- MANUFACTURER
- General Radio Co.
- MODEL
- 1931-A
- LOCATION
- Cambridge, Massachusetts, United States of America
More Information
General Information
- Serial #
- 131
- Part Number
- 1
- Total Parts
- 1
- AKA
- N/A
- Patents
- N/A
- General Description
- METAL CABINET/ SYNTHETIC KNOBS/ GLASS DIAL COVERS/GLASS, METAL & SYNTHETIC WORKING PARTS.
Dimensions
Note: These reflect the general size for storage and are not necessarily representative of the object's true dimensions.
- Length
- 48.2 cm
- Width
- 34.0 cm
- Height
- 22.0 cm
- Thickness
- N/A
- Weight
- N/A
- Diameter
- N/A
- Volume
- N/A
Lexicon
- Group
- Communications
- Category
- Radio
- Sub-Category
- N/A
Manufacturer
- AKA
- General Radio
- Country
- United States of America
- State/Province
- Massachusetts
- City
- Cambridge
Context
- Country
- Canada
- State/Province
- Unknown
- Period
- 1940s & 1950s
- Canada
-
USED IN CANADA - Function
-
TO MEASURE & TO INDICATE CONTINUOUSLY THE PERCENTAGE MODULATION OF BROADCAST & OTHER RADIO-TELEPHONE TRANSMITTERS. - Technical
-
SHOWS THE TYPE OF EQUIPMENT & LEVEL OF ACCURACY ACHIEVED IN THIS TIME PERIOD. - Area Notes
-
Unknown
Details
- Markings
- MFR'S PLATE: 'AMPLITUDE-MODULATION/ MONITOR/ TYPE NO.1931-A SERIAL NO.131/ GENERAL RADIO CO./ CAMBRIDGE MASS. U.S.A./ SEE LICENSE NOTICE/ U.S. PATENTS: 1,999,869; 2,012,291; 2,069,934; 2,298,177'/ PLATE: 'PROPERTY OF/ 93893/ CBC'/ DIALS ON FRONT PANEL: 'SET TORED LINE/ CARRIER/ GENERAL RADIO CO./ MF'D. BY WESTON/ MODEL 891/ G.R. MEDS-15/ 450 NOMINAL'/ '% MODULATION/ GENERAL RADIO CO./ MF'D VY WESTON/ MODEL 891 G.R. MEDS-14/ 700 NOMINAL'/ PRINTED ON PANEL: 'OVER MODULATION/ MODULATION PEAKS/ TUNE FOR MAXIMUM/ PEAKS POS. NEG./ AUDIO OUTPUT/ 600 '/ STICKER ON BACK: 'SERIAL NO./ 03-0-351/ PROPERTY OF/ CBC/ *
- Missing
- N/A
- Finish
- CRINKLED FRONT PANEL PAINTED BLACK/ BLACK KNOBS/ BLACK & WHITE PRINTING
- Decoration
- SYMMETRICAL KNOBS & METERS
CITE THIS OBJECT
If you choose to share our information about this collection object, please cite:
General Radio Co., Monitor, amplitude modulation, between 1945–1957, Artifact no. 1986.0541, Ingenium – Canada’s Museums of Science and Innovation, http://collections.ingeniumcanada.org/en/id/1986.0541.001/
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