Monitor, frequency deviation
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1985.0592.001
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- OBJECT TYPE
- AM TRANSMITTERS
- DATE
- 1945–1955
- ARTIFACT NUMBER
- 1985.0592.001
- MANUFACTURER
- General Radio Co.
- MODEL
- 1181-A
- LOCATION
- Cambridge, Massachusetts, United States of America
More Information
General Information
- Serial #
- 1679
- Part Number
- 1
- Total Parts
- 2
- AKA
- N/A
- Patents
- N/A
- General Description
- THE BODY OF THE MONITOR & THEFRONT PANEL ARE METAL. THE GAUGE MOLDINGS ARE BAKELITE. THE SWITCHES ARE METAL & THE WARNING-INDICATOR LIGHTS ARE PLASTIC. THE THERMOMETER IS GLASS & THE FLUID INSIDE IS MERCURY. VACUUM TUBES ARE MADE OF GLASS & METAL.
Dimensions
Note: These reflect the general size for storage and are not necessarily representative of the object's true dimensions.
- Length
- 48.0 cm
- Width
- 31.0 cm
- Height
- 38.3 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
- Unknown
- State/Province
- Unknown
- Period
- Unknown
- Canada
-
Unknown - Function
-
Used by broadcasting Stations operating in the 500-2000kc band to enable them to comply with the frequency tolerance specification of the E.C.C. - Technical
-
EXAMPLE OF THE HIGH QUALITY FREQUENCY CHECKING EQUIPMENT REQUIRED BY RADIO STATIONS IN THAT TIME PERIOD TO COMPLY WITH GOVERNMENT REGULATIONS RE RADIO FREQUENCY. - Area Notes
-
Unknown
Details
- Markings
- Mfr's plate on casing front bears following info.: 'FREQUENCY/ DEVIATION MONITOR/ TYPE NO./ 1181-A/ SERIAL NO./ 1679/ GR/ GENERAL RADIO CO./ CAMBRIDGE MASS., U.S.A./ SEE LICENSE NOTICE/ U.S. PATENTS:/ 2,298,177 2,362,503'/ Plate on casing back bears following info.: 'F.C.C. APPROVAL NO. 1467'/ Label on casing back bears following info.: ‘GENERAL RADIO COMPANY/ SERVICE DEPARTMENT/ 99 FLORAL PARKWAY/ TORONTO 15, ONTARIO/ TELEPHONE 247-2171'/ Second label below, bears following info.: ‘THIS INSTRUMENT IS LICENSED UNDER/ PATENTS OF THE AMERICAN TELEPHONE/ AND TELEGRAPH COMPANY SOLELY FOR/ UTILIZATION IN RESEARCH, INVESTIGATION, MEASUREMENT, TESTING, INSTRUCITON/ AND DEVELOPMENT WORK IN PURE/ AND APPLIED SCIENCE./ THIS APPARATUS USES INVENTIONS OF UNITED/ STATES PATENTS LICENSED BY RADIO/ CORPORATION OF AMERICA. PATENT NUMBERS/ SUPPLIED UPON REQUEST. LICENSED ONLY FOR OR/ FOR USE IN MEASURING OR TESTING ELECTRONIC/ DEVICES, ELECTRON TUBE CIRCUITS, PARTS OF/ SUCH DEVICES AND CIRCUITS, AND ELEMENTS/ FOR USE IN SUCH DEVICES AND CIRCUITS'./ Plate in lower right of casing back bears following info.: ‘115 VOLTS/ 50-60~'
- Missing
- POWER CORD
- Finish
- THE FRONT OR "DRESS" PANEL IS FINISHED WITH A GREY-BROWN PAINT. THE BODY OF THE UNIT IS A GREY-WHITE COLOUR PAINTED OVER A SILVER METAL.
- Decoration
- SERIAL NO. PLATE RIVETED ONTO THE CENTRE FRONT OF THE UNIT.
CITE THIS OBJECT
If you choose to share our information about this collection object, please cite:
General Radio Co., Monitor, frequency deviation, circa 1945–1955, Artifact no. 1985.0592, Ingenium – Canada’s Museums of Science and Innovation, http://collection.ingeniumcanada.org/en/item/1985.0592.001/
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