Vacuum tube

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OBJECT TYPE
REMOTE CUTOFF/AMPLIFIER
DATE
1940–1949
ARTIFACT NUMBER
1976.0794.001
MANUFACTURER
Sylvania
MODEL
7A7E
LOCATION
United States of America

More Information


General Information

Serial #
N/A
Part Number
1
Total Parts
1
AKA
N/A
Patents
N/A
General Description
GLASS/ METAL

Dimensions

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

Length
7.0 cm
Width
3.0 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
Sylvania
Country
United States of America
State/Province
Unknown
City
Unknown

Context

Country
North America
State/Province
Unknown
Period
PROBABLY 1940'S & 1950'S
Canada
Unknown
Function
USED AS A RF AMPLIFIER IN A RADIO RECEIVER.
Technical
'LOKTAL' TUBES WERE THE 1ST TYPE IN WHICH THE BAKELITE BASE WAS DISPENSED WITH & THE LEAD OUT WIRES FORMED THE CONNECTING PINS. THIS PROVIDED BETTER PERFORMANCE AT HIGHER RADIO FREQUENCIES. THE CENTRAL METAL SPIGOT PROVIDED AN EARTH CONNECTION, LOCKED THE TUBE IN THE SOCKET, & PROVIDED A MEANS OF INDEXING (REF.1)
Area Notes
Unknown

Details

Markings
ON GLASS: '7A7E/ PHILCO/ REG. U.S. PAT. OFF./ LOKTAL/ MADE IN U.S.A./ 0/1/ WHEN RENEWING/ INSIST ON/ A GENUINE/ PHILCO TUBE'
Missing
N/A
Finish
UNCOLOURED GLASS WITH WHITE PRINTING
Decoration
N/A

CITE THIS OBJECT

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

Sylvania, Vacuum tube, between 1940–1949, Artifact no. 1976.0794, Ingenium – Canada’s Museums of Science and Innovation, http://collection.ingeniumcanada.org/en/id/1976.0794.001/

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