Vacuum tube
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1969.0487.001
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- OBJECT TYPE
- AMPLIFIER/HIGH VACUUM
- DATE
- 1919
- ARTIFACT NUMBER
- 1969.0487.001
- MANUFACTURER
- Ediswan
- MODEL
- R4C
- LOCATION
- England
More Information
General Information
- Serial #
- 2136
- Part Number
- 1
- Total Parts
- 1
- AKA
- N/A
- Patents
- N/A
- General Description
- TUNGSTEN FILAMENT/ NICKEL ANODE/ OTHER METAL/ GLASS ENVELOPE/ SYNTHETIC WIRE COVER
Dimensions
Note: These reflect the general size for storage and are not necessarily representative of the object's true dimensions.
- Length
- 5.1 cm
- Width
- 8.3 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
- Edison
- Country
- England
- State/Province
- Unknown
- City
- Unknown
Context
- Country
- Unknown
- State/Province
- Unknown
- Period
- Unknown
- Canada
-
Unknown - Function
-
USED AS AN AMPLIFIER IN RADIO RECEIVERS WHEN LOWER VOLTAGE WAS REQUIRED - Technical
-
REDESIGN OF TYPE R4A FOR USE IN AMPLIFIERS WHERE THE NOISE INTRODUCED BY THE R4A WAS OBJECTIONABLE/ OPERATED AT A LOWER VOLTAGE THAN THE R4B - Area Notes
-
Unknown
Details
- Markings
- ETCHED ON GLASS: 'ROYAL/ EDISWAN/ [ANCHOR]/ PATT.4411C/ VALVE R. 4C/ SERIAL NO. 2136'
- Missing
- From CA of 02/05/1998 by Pat Montero: No - Complete
- Finish
- UNCOLOURED GLASS ENVELOPE
- Decoration
- N/A
CITE THIS OBJECT
If you choose to share our information about this collection object, please cite:
Ediswan, Vacuum tube, circa 1919, Artifact no. 1969.0487, Ingenium – Canada’s Museums of Science and Innovation, http://collections.ingeniumcanada.org/en/id/1969.0487.001/
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