Test set, radio frequency
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1970.0135.001
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- OBJECT TYPE
- DECREMETER
- DATE
- 1915
- ARTIFACT NUMBER
- 1970.0135.001
- MANUFACTURER
- FIRTH, JOHN
- MODEL
- D
- LOCATION
- New York, New York, United States of America
More Information
General Information
- Serial #
- 235
- Part Number
- 1
- Total Parts
- 2
- AKA
- N/A
- Patents
- N/A
- General Description
- CASE, LEATHER COVERED WOOD BOX WITH TIN PLATED INTERNAL COPPER BOX/ TOP PLATE BAKELITE/ WORKING PARTS METAL & SYNTHETIC/ GLASS COVER PLATE ON METER/ COILS MOUNTED IN WOOD CASES/ CLOTHLINING IN BOX
Dimensions
Note: These reflect the general size for storage and are not necessarily representative of the object's true dimensions.
- Length
- 25.4 cm
- Width
- 25.4 cm
- Height
- 24.1 cm
- Thickness
- N/A
- Weight
- N/A
- Diameter
- N/A
- Volume
- N/A
Lexicon
- Group
- Communications
- Category
- Radio
- Sub-Category
- N/A
Manufacturer
- AKA
- FIRTH
- Country
- United States of America
- State/Province
- New York
- City
- New York
Context
- Country
- Worldwide
- State/Province
- Unknown
- Period
- 1915-1930
- Canada
-
Unknown - Function
-
USED TO MEASURE THE FREQUENCY (WAVELENGTH) AND BAND WIDTH OF A SPARK GENERATED RADIO FREQUENCY SIGNAL - Technical
-
Unknown - Area Notes
-
Unknown
Details
- Markings
- THE PRIMARY KNOB/DIAL IS ENGRAVED 0 CENTRE TO.30 0.30 IN.05 DECREMENTS AND INCREMENTS/ THE VERNIER DIAL IS CALIBRATED 60 METERS TO 3200 METERS IN 4 BANDS/ MFG'S PLATE: 'KOLSTER DECREMETER/ TYPE D SERIAL NO. 235/ BY/ JOHN FIRTH/ 81 NEW STREET NEW YORK/ BRITISH PATENT 3478 OF 1914/ FRENCH PATENT 469004 OF 1914/ RANGE 75 TO 3000 METERS'/ METER FACE: 'WESTON/ THERMO-GALVANOMETER/ WESTON ELECTRICAL INSTRUMENT CO., NEWARK, N.J., U.S.A./ MODEL 425'
- Missing
- DIAPHRAM AND CAP MISSING FROM HEADPHONE (700135.2)/ CATSWHISKER MISSING FROM CRYSTAL DETECTOR ASSEMBLY/ CAP MISSING FROM BUZZER
- Finish
- BROWN LEATHER ON CASE/ INNER LINING LEATHER & PURPLE FABRIC/ COIL CASES STAINED & VARNISHED
- Decoration
- N/A
CITE THIS OBJECT
If you choose to share our information about this collection object, please cite:
FIRTH, JOHN, Test set, radio frequency, circa 1915, Artifact no. 1970.0135, Ingenium – Canada’s Museums of Science and Innovation, http://collection.ingenium.ca/en/id/1970.0135.001/
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