Test set, audio frequency
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1974.0374.001
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- OBJECT TYPE
- OUTPUT POWER METER
- DATE
- 1940
- ARTIFACT NUMBER
- 1974.0374.001
- MANUFACTURER
- General Radio Co.
- MODEL
- 783-A
- LOCATION
- Cambridge, Massachusetts, United States of America
More Information
General Information
- Serial #
- 824
- Part Number
- 1
- Total Parts
- 1
- AKA
- N/A
- Patents
- N/A
- General Description
- WOODEN BASE/ BAKELITE PANEL/ STEEL VENTILATION PORTS/ BRASS CARRYING HANDLE
Dimensions
Note: These reflect the general size for storage and are not necessarily representative of the object's true dimensions.
- Length
- 42.5 cm
- Width
- 20.3 cm
- Height
- 14.9 cm
- Thickness
- N/A
- Weight
- N/A
- Diameter
- N/A
- Volume
- N/A
Lexicon
- Group
- Communications
- Category
- Service-test equipment
- Sub-Category
- N/A
Manufacturer
- AKA
- General Radio
- Country
- United States of America
- State/Province
- Massachusetts
- City
- Cambridge
Context
- Country
- North America
- State/Province
- Unknown
- Period
- 1940-1960
- Canada
-
Unknown - Function
-
USED TO MEASURE THE POWER OUTPUT OF AN AUDIO (SOUND) AMPLIFIER. WITH THE ADDITION OF AN AUDIO OSCILLATOR, THE FREQUENCY RESPONSE IN THE AUDIO SPECTRUM COULD BE MEASURED. FOR EXAMPLE, 100Hz TO 20000 Hz. - Technical
-
Unknown - Area Notes
-
Unknown
Details
- Markings
- MFR'S PLATE: 'OUTPUT POWER METER/ TYPE NO. 783-A/ SERIAL NO. 824/ GENERAL RADIO CO. CAMBRIDGE MASS. U.S.A.'/ AROUND CONTROLS: 'IMPEDANCE/ MULTIPLIER OHMS/ POWER. MULTIPLIER'/ [CALIBRATIONS AROUND KNOBS & ABOVE BUTTONS'/ METER: 'WESTON ELEC. INST. CORP. NEWARK, N.J. U.S.A./ [CALIBRATIONS 0 TO 10]/ GENERAL RADIO CO./ MF'D. BYWESTON/ MODEL 892 G.R. 488-304/ RECTIFIER TYPE'
- Missing
- BROKEN METER GLASS
- Finish
- LIGHT MAHOGANY VARNISH FINISH/ BLACK BAKELITE PANEL/ BLACK ENAMEL VENTILATION SCREENS
- Decoration
- N/A
CITE THIS OBJECT
If you choose to share our information about this collection object, please cite:
General Radio Co., Test set, audio frequency, circa 1940, Artifact no. 1974.0374, Ingenium – Canada’s Museums of Science and Innovation, http://collection.ingenium.ca/en/id/1974.0374.001/
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