Vacuum tube

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Ingenium, 1999.0196.001
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OBJECT TYPE: SILICA
DATE: 1949
ARTIFACT NUMBER: 1999.0196.001

MANUFACTURER: MULLARD ELECTRONIC PRODUCTS LTD.
MODEL: TYS5-3000
LOCATION: London, England

More Information

General Information

Serial #: 1618
Part Number: 1
Total Parts: 6
AKA: N/A
Patents: N/A
General Description: .1 GLASS, SILICA & METAL TUBE..2-.5 METAL FITTINGS..6 WOODEN CRATE HAS METAL HINGES & OTHER FITTINGS; CANVAS STRAPS; FITTED WITH FOAM PADS; CW LOOSE WOOL (?) PADDING.

Dimensions

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

Length: 67.5 cm
Width: 18.5 cm
Height: 18.5 cm
Thickness: N/A
Weight: N/A
Diameter: N/A
Volume: N/A

Lexicon

Group: Vacuum Tubes
Category: Transmitting
Sub-Category: N/A

Manufacturer

AKA: MULLARD
Country: England
State/Province: Unknown
City: London

Context

Country: Canada
State/Province: Ontario
Period: THIS TYPE OF TUBE USED. C. 1949+. THIS TUBE USED C. 1970-1975+
Canada: USED IN TIME SIGNAL TRANSMITTERS OPERATED BY THE NATIONAL RESEARCH COUNCIL OF CANADA, FROM GREENBANK RD. SITE.
Function: USED IN RADIO SIGNAL TRANSMITTING UNIT.
Technical: EXAMPLE OF SILICA PISTON TUBE, FIRST DEVELOPED BY MULLANDIN 1949. THE USE OF SILICA PERMITS THE TUBES TO OPERATE AT HIGHER INTERNAL TEMPERATURES THAN ORDINARY GLASS TUBES, WITHOUT LOSS OR FLUCTUATION, AND UNFFECTED BY SUDDEN CHANGES IN TEMPERATURE. DEPENDING ON THE DAMAGE/PROBLEM SILICA TUBES COULD BE REPAIRED, SAVING BOTH TIME & EXPENSE. (REF. 1) THIS TUBE WAS FITTED WITH METAL BALLS (.2-.5), WHICH WERE USED TO EQUALIZE THE VOLTAGE IN OPERATION, PREVENTING SPARKS. THE STATION HAD AN OPERATING POWER OF 3000 WATTS. (REF. 2)
Area Notes: Unknown

Details

Markings: .1 "MULLARD/ TYS5-3000/ 1618" cast in raised print on tube end; "G G" and "A A" cast in raised print, on opposite end of tube..2-.5 No markings visible..6 "MULLARD/ TRANSMITTING VALVE" stencilled in black print on top of case. "LID LID" and "GLASS/ WITH CARE" also stencilled on case. "LINTAFOAM" stamped in black ink on padded liners.
Missing: UNKNOWN- APPEARS COMPLETE.
Finish: .1 CLEAR GLASS TUBE; SILVER METAL COMPONENTS..2-.5 SILVER METAL FITTINGS..6 NATURAL WOOD CASE; KHAKI GREEN WOVEN CANVAS STRAPS.
Decoration: N/A

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

MULLARD ELECTRONIC PRODUCTS LTD., Vacuum tube, circa 1949, Artifact no. 1999.0196, Ingenium – Canada’s Museums of Science and Innovation, http://collection.ingeniumcanada.org/en/item/1999.0196.001/

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