General Information

Serial #

123-5

Part Number

1

Total Parts

1

AKA

N/A

Patents

N/A

General Description

STEEL RELAYRACK/ ALUMINUM COVERS/ METAL, GLASS & SYNTHETIC WORKING PARTS

Dimensions

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

Length

2.1 m

Width

N/A

Height

N/A

Thickness

N/A

Weight

N/A

Diameter

N/A

Volume

N/A

Lexicon

Group

Communications

Category

Telephony

Sub-Category

N/A

Manufacturer

AKA

LENKURT

Country

United States of America

State/Province

California

City

San Carlos

Context

Country

North America

State/Province

Unknown

Period

1945-1950

Canada

THIS UNIT PROVIDED 3 TOLL CIRCUITS BETWEEN METCALFE, ON & OTTAWA.

Function

TO DEVELOP 3 TOLL QUALITY TELEPHONE CIRCUITS THAT OPERATE IN THE FREQUENCY BAND 3.5 TO 35 KILOHERTZ ON AN OPEN WIRE TELEPHONE FACILITY.

Technical

ADAPTION OF 1945 TECHNOLOGY TO A MID 1920'S CARRIER DESIGN. THIS IS A LATER VERSION OF THE WESTERN ELECTRIC C3 CARRIER [1920'S TO EARLY 1930'S]. BOTH THE LENKURT 33A AND THE C3 CARRIER WERE SINGLE SIDEBAND SUPPRESSED CARRIER DESIGN. LENKURT 33A WAS USUALLY OPERATED FROM THE 110V COMMERCIAL LINE AS IT HAD AN AC TO DC POWER SUPPLY FOR EACH BAY. THE C3 SYSTEMS WERE OPERATED FROM THE OFFICE BATTERY PLANTS.

Area Notes

Unknown

Details

Markings

HANDWRITTEN ON 3 PANEL LABELS: 'SYS #1/ METCALFE OTTAWA/ CCT #10/ SYS #1/ METCALFE OTTAWA/ CCT #9/ SYS #1/ METCALFE OTTAWA/ CCT #8'

Missing

N/A

Finish

SILVER GRAY ENAMEL

Decoration

N/A