General Information

Serial #

709631

Part Number

1

Total Parts

1

AKA

N/A

Patents

N/A

General Description

Metal casing and connector pieces with hard synthetic knobs and flexible synthetic handles.

Dimensions

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

Length

43.0 cm

Width

23.0 cm

Height

14.8 cm

Thickness

N/A

Weight

N/A

Diameter

N/A

Volume

N/A

Lexicon

Group

Communications

Category

Sound

Sub-Category

N/A

Manufacturer

AKA

Bruel Kjaer

Country

Denmark

State/Province

Unknown

City

Unknown

Context

Country

Canada

State/Province

Ontario

Period

1978-1998

Canada

Bell Northern Research, was the research and development subsidiary of Northern Telecom (later Nortel Networks) and Bell Canada. It was built by Northern Telecom at its Trans-Canada plant in Montreal. Northern Telecom and its predecessor, Northern Electric, was for decades Canada’s largest manufacturer of telecommunications equipment. Originally a subsidiary of the AT&T-owned Western Electric, for which it manufactured American-designed products for the Canadian market, Northern Electric became Canadian-owned in the 1950s and in the 1960s began to design and produce equipment to meet the distinctive needs of Canadian telecommunication companies. In the 1970s, through its new research subsidiary, Bell Northern Research, the company made a concerted shift from conventional analogue equipment into the emerging field of digital communications, becoming in the 1980s the first equipment supplier to provide a complete line of fully digital switching and transmission gear. During this decade the company moved aggressively into export markets, and opened manufacturing and R&D operations in several countries. The company’s sales soared during the internet boom of the 1990s, but a combination of poor financial decisions and a failure to maintain its technological edge led eventually to its bankruptcy in 2009. The original Bell Northern facilities were designed with cutting edge telecommunications research and development in mind with the first three buildings on the campus featuring laboratories, an extensive research library, and an anechoic chamber. The anechoic chamber was the focal point of the Bell Northern Research acoustics research examining both the technology and placement of speakers and microphones in telecommunication devices. The anechoic chamber group was organized under the Industrial Design and working together with design were responsible for the development of the acoustic properties of most products. (From the Acquisition Proposal, see Ref. 1)

Function

Used to filter out frequencies outside of a specific range to ensure that only the desired frequency passes. (From the Acquisition Proposal, see Ref. 1)

Technical

Used in conjunction with other Bruel & Kjaer equipment to build an experimental acoustic apparatus. (From the Acquisition Proposal, see Ref. 1)

Area Notes

Unknown

Details

Markings

On the proper front, above a small black panel with indicator lights: "Selected Filter"/ On the small black panel: "1/4 Oct./ 1/3 Oct./ Linear/ Hz/ kHz/ Weight."/ Labels for switches, dials and ports printed on the proper front: "Input/ Overload/ 1 M[Ohm] 100 pF/ Selectivity/ Bandwidth/ 1/3 Octave/ 1/1 Octave/ Record Step/ 1/3 Octave/ 1/3 Octave/ 1/1 Octave/ Range/ Lin/ 2 Hz - 20 kHz - A - Lin/ Manual Filter Selector/ 2/ 4/ 8/ 16/ 31.5/ 63/ 125/ 250/ 500/ 1 k/ 2 k/ 4 k/ 8 k/ 16 k/ A/ Lin/ [logo]/ Brüel & Kjaer/ Band Pass/ Filter/ Type 1618/ Filter Control Mode/ Manual/ Recorder/ Recorder/ Stop/ Run/ Power/ On/ Output/ ZL >5 [Ohm]"/ On the stickers on the proper front: "Bell-Northern Research/ L0013362"/ "nt/ FOR/ INDICATION/ ONLY"/ "BNR [logo]/ ACOUSTIC DESIGN"/ Scratched into the finish of the casing on the proper top: "BNR Property/ L 13362"/ Printed on the proper back panel: "Line Voltage/ 127/ 200/ 115/ 240/ 100/ 220/ Chassis/ Fuse 0,2 A/ Signal/ Ground/ Line/ 50 - 400 Hz/ Made in Denmark/ Output/ Input/ Recorder Control/ I/ II/ (2307)"/ On various stickers on the proper back: "ontario hydro/ electrical/ approval/ by special inspection - series K"/ "[logo] Serial no./ 709631"/ "[logo]/ BRUEL & KJAER CANADA LTD./ 90 Leacock Road, Pointe Claire, Qué./ MODEL 1618C/ VOLT HZ VA/ PURCHASE/ DATE/ 18/07/78/ FUSE"

Missing

Appears complete

Finish

Predominantly black casing with light green panels on the proper front and the proper back. On the green panels are black markings and knobs, silver coloured metal connectors,and white,blue, pink and grey stickers. On the proper top there are two black synthetic handles that collapses almost flush with the top of the casing.

Decoration

N/A