Vacuum tube
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1971.0633.001
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- OBJECT TYPE
- DETECTOR/AMPLIFIER
- DATE
- 1925
- ARTIFACT NUMBER
- 1971.0633.001
- MANUFACTURER
- NORTHERN ELECTRIC CO. LTD.
- MODEL
- R221D
- LOCATION
- Canada
More Information
General Information
- Serial #
- N/A
- Part Number
- 1
- Total Parts
- 1
- AKA
- N/A
- Patents
- N/A
- General Description
- GLASS/ METAL/ WAX/ PAPER
Dimensions
Note: These reflect the general size for storage and are not necessarily representative of the object's true dimensions.
- Length
- 10.2 cm
- Width
- 3.2 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
- Unknown
- City
- Unknown
Context
- Country
- Unknown
- State/Province
- Unknown
- Period
- Unknown
- Canada
-
MADE IN CANADA - Function
-
GENERAL PURPOSE TRIODE USED TO DETECT & AMPLIFY IN RADIO RECEIVERS - Technical
-
TYPE SAMPLE OF EARLY TRIODE MADE IN CANADA BUT NOT 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
- PAPER AFFIXED TO BULB READS: 'R221-D MADE IN/ CANADA/ PATENTED 1917 1920/ 1921 1922 1923 1925/ NORTHERN ELECTRIC/ COMPANY LIMITED'
- Missing
- N/A
- Finish
- UNCOLOURED GLASS/ UNFINISHED METAL/ BLACK INSERT
- Decoration
- N/A
CITE THIS OBJECT
If you choose to share our information about this collection object, please cite:
NORTHERN ELECTRIC CO. LTD., Vacuum tube, 1925, Artifact no. 1971.0633, Ingenium – Canada’s Museums of Science and Innovation, http://collection.ingenium.ca/en/id/1971.0633.001/
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