General Information

Serial #

N/A

Part Number

1

Total Parts

2

AKA

N/A

Patents

N/A

General Description

.1 GLASS ENVELOPE; METAL PINS & PARTS; SYNTHETIC BASE/.2 CARDBOARD BOX

Dimensions

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

Length

N/A

Width

3.2 cm

Height

7.8 cm

Thickness

N/A

Weight

N/A

Diameter

N/A

Volume

N/A

Lexicon

Group

Vacuum Tubes

Category

Miscellaneous

Sub-Category

N/A

Manufacturer

AKA

Amperite

Country

United States of America

State/Province

Unknown

City

Unknown

Context

Country

Canada

State/Province

Ontario

Period

Unknown

Canada

FROM COLLECTION OF VACUUM TUBES DONATED TO CSTM BY CANADIAN GOVERNMENT DEPARTMENT NATURAL RESOURCES CANADA.

Function

VACUUM TUBE USED AS FOR AUTOMATIC REGULATION OF CURRENT & VOLTAGE, FUNCTIONING AS AUTOMATIC RHEOSTAT TO KEEP CURRENT IN CIRCUIT AT DEFINITE VALUE.

Technical

EXAMPLE OF BALLAST TUBE.

Area Notes

Unknown

Details

Markings

.1 WHITELETTERING ON TUBE TOP READS "AMPERITE/ 4H-4/ REGULATOR"; RAISED LETTERING ON UNDERSIDE OF BASE READS "LICENSED ONLY TO EXTENT/ INDICATED ON CARTON"/.2 BLACK LETTERING ON BOX END READS "4H-4"; WHITE & BLACK LETTERING ON BOX SIDES READS "AUTOMATIC/ REGULATOR/ AMPERITE [LOGO]/ MADE IN U.S.A./ PRINTED IN U.S.A./ BALLAST RESISTANCE FOR/ AUTOMATIC REGULATION/ OF CURRENT AND VOLTAGE"; WHITE LETTERING ON SIDES READS "AMPERITE AUTOMATICALLY/ CONTROLS CURRENT AND/ VOLTAGE FLUCTUATIONS./ RECOMMENDED BY LEADING/ MANUFACTURERS AND/ SERVICE ORGANIZATIONS./ AMPERITE PROLONGS THE/ LIFE OF TUBES, SETS,/ AND OTHER APPARATUS"; PATENT INFO.

Missing

COMPLETE

Finish

.1 COLOURLESS TRANSPARENT GLASS; BLACK BASE; METALLIC PINS/.2 RED & BLACK EXTERIOR

Decoration

.2 AMPERITE LOGO ON SIDES & END OF BOX