Vacuum tube

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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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