Vacuum tube

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OBJECT TYPE
DETECTOR/AMPLIFIER
DATE
1918
ARTIFACT NUMBER
1969.0866.001
MANUFACTURER
M.O. VALVE CO. LTD.
MODEL
R4A
LOCATION
England

More Information


General Information

Serial #
42235
Part Number
1
Total Parts
2
AKA
N/A
Patents
N/A
General Description
TUNGSTEN FILAMENT/ NICKEL ANODE/ OTHER METAL/ GLASS ENVELOPE/ FABRIC WIRE COVER/ CARDSTOCK

Dimensions

Note: These reflect the general size for storage and are not necessarily representative of the object's true dimensions.

Length
8.3 cm
Width
5.1 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
Unknown

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 OF TUBE: 'OSRAM/ G.E.C./ MADE IN/ ENGLAND/ R.4 A./ VALVE/ WIRELESS RECEIVING/ R.4 A./ PATT. NO. 4411/ A.20114'/ PRINTING ON BOX INCLUDES: '"OSRAM"/ G.E.C./ MADE IN/ ENGLAND/ WIRELESS RECEIVING/ R.4 A/ PATTERN NO. 4411/ A.'
Missing
WIRE COVERING
Finish
UNCOLOURED GLASS ENVELOPE/ LIGHT GREENWITH BLUE PRINTING/ BLACK RIBBON & WIRE COVERING
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. 1969.0866, Ingenium – Canada’s Museums of Science and Innovation, http://collection.ingeniumcanada.org/en/id/1969.0866.001/

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