Vacuum tube

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Ingenium, 1971.0634.001
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OBJECT TYPE: DETECTOR/AMPLIFIER
DATE: 1926–1928
ARTIFACT NUMBER: 1971.0634.001

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

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: 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 USA. THE INNER SURFACT 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: STAMPED INTO METAL BASE: 'MADE IN CANADA/ NORTHERN/ ELECTRIC CO./ LIMITED/ PATENTED 1916/ PATENTED 1917/ PATENTED 1920/ 3 PATS/ PATENTED 1921/ PATENTED 1922/ 3 PATS'/ ETCHED ON GLASS: 'R221-D'
Missing: N/A
Finish: UNCOLOURED GLASS/ UNFINISHED METAL/ BLACK INSERT
Decoration: N/A

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If you choose to share our information about this collection object, please cite:

NORTHERN ELECTRIC CO. LTD., Vacuum tube, circa 1926–1928, Artifact no. 1971.0634, Ingenium – Canada’s Museums of Science and Innovation, http://collection.ingenium.ca/en/id/1971.0634.001/

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