Vacuum tube
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1971.0667.001
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- OBJECT TYPE
- DETECTOR/AMPLIFIER
- DATE
- 1929
- ARTIFACT NUMBER
- 1971.0667.001
- MANUFACTURER
- Northern Electric Co. Ltd. of Canada
- MODEL
- R221D
- LOCATION
- Montréal, Québec, Canada
More Information
General Information
- Serial #
- N/A
- Part Number
- 1
- Total Parts
- 1
- AKA
- N/A
- Patents
- N/A
- General Description
- GLASS/ SYNTHETIC/ METAL
Dimensions
Note: These reflect the general size for storage and are not necessarily representative of the object's true dimensions.
- Length
- 10.8 cm
- Width
- 4.4 cm
- Height
- N/A
- Thickness
- N/A
- Weight
- N/A
- Diameter
- N/A
- Volume
- N/A
Lexicon
- Group
- Vacuum Tubes
- Category
- Receiving
- Sub-Category
- N/A
Manufacturer
- AKA
- Northern Electric
- Country
- Canada
- State/Province
- Québec
- City
- Montréal
Context
- Country
- Unknown
- State/Province
- Unknown
- Period
- Unknown
- Canada
-
MFG. IN CANADA - Function
-
GENERAL PURPOSE TRIODE USED TO DETECT & AMPLIFY IN RADIO RECEIVERS - Technical
-
TYPE SAMPLE OF EARLY TRIODE MADE IN CANADA BUT NOT IN THE USA. THE INNER SURFACE OF THE GLASS IS FLASH COATED WHICH GREATLY INCREASES THE VACUUM & THE FILAMENT IS OF THE COATED DULL GLOWING TYPE WHICH EMITS A STEADY FLOW OF ELECTRONS (SEE REF. 1) - Area Notes
-
Unknown
Details
- Markings
- EMBOSSED ON BOTTOM OF BASE: 'NORTHERN ELECTRIC COMPANY LIMITED/ R221-D/ PATENTED/ 1917 1920 1921 1922/ 1923 1925/ MADE IN CANADA'
- Missing
- N/A
- Finish
- UNCOLOURED GLASS/ BLACK BASE
- Decoration
- N/A
CITE THIS OBJECT
If you choose to share our information about this collection object, please cite:
Northern Electric Co. Ltd. of Canada, Vacuum tube, circa 1929, Artifact no. 1971.0667, Ingenium – Canada’s Museums of Science and Innovation, http://collection.ingeniumcanada.org/en/id/1971.0667.001/
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