Vacuum tube
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1966.0409.001
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- OBJECT TYPE
- DETECTOR/AMPLIFIER
- DATE
- 1918
- ARTIFACT NUMBER
- 1966.0409.001
- MANUFACTURER
- M.O. VALVE CO. LTD.
- MODEL
- R4A
- LOCATION
- London, England
More Information
General Information
- Serial #
- 19641
- Part Number
- 1
- Total Parts
- 2
- AKA
- N/A
- Patents
- N/A
- General Description
- TUNGSTEN FILAMENT/ NICKLE ANODE/ OTHER METAL/ GLASS ENVELOPE/ FABRIC WIRE COVER
Dimensions
Note: These reflect the general size for storage and are not necessarily representative of the object's true dimensions.
- Length
- 8.0 cm
- Width
- 5.0 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
- MO VALVE
- Country
- England
- State/Province
- Unknown
- City
- London
Context
- Country
- Unknown
- State/Province
- Unknown
- Period
- 1920'S
- Canada
-
Unknown - Function
-
TO DETECT & AMPLIFY RADIO WAVES IN A RECEIVER - Technical
-
REDESIGN OF TYPE R4 IN ORDER TO REDUCE THE FILAMENT POWER REQUIRED/ ONE OF THE FIRST 'HARD' OR HIGH VACUUM TUBES DEVELOPED - Area Notes
-
Unknown
Details
- Markings
- ETCHED ON GLASS: 'OSRAM/ G.E.C./ MADE IN/ ENGLAND/ R. 4A/ VALVE/ WIRELESS RECEIVING/ R. 4A/ PATT. No. 4411A/ A.19641'/ HANDWRITTEN INSIDE BULB: 'B4078'/ PRINTING ON BOX INCLUDES: '"OSRAM"/ G.E.C./ MADE IN/ ENGLAND/ WIRELESSRECEIVING/ R. 4A/ PATTERN No 4411A/ A. 19641'
- Missing
- N/A
- Finish
- UNCOLOURED GLASS/ BLACK, RED & WINE WIRE COVER/ PINK BOX WITH BLUE PRINING
- Decoration
- N/A
CITE THIS OBJECT
If you choose to share our information about this collection object, please cite:
M.O. VALVE CO. LTD., Vacuum tube, circa 1918, Artifact no. 1966.0409, Ingenium – Canada’s Museums of Science and Innovation, http://collection.ingeniumcanada.org/en/id/1966.0409.001/
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