Renseignements généraux

Nº de série

586709

Nº de partie

1

Nombre total de parties

1

Ou

S/O

Brevets

S/O

Description générale

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

Dimensions

Remarque : Cette information reflète la taille générale pour l’entreposage et ne représente pas nécessairement les véritables dimensions de l’objet.

Longueur

38,2 cm

Largeur

22,4 cm

Hauteur

14,5 cm

Épaisseur

S/O

Poids

S/O

Diamètre

S/O

Volume

S/O

Lexique

Groupe

Communications

Catégorie

Son

Sous-catégorie

S/O

Fabricant

Ou

Bruel Kjaer

Pays

Danemark

État/province

Inconnu

Ville

Copenhague

Contexte

Pays

Canada

État/province

Ontario

Période

1976-1998

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)

Fonction

Used to measure the acoustic output of an acoustic experimental setup.(From the Acquisition Proposal, see Ref. 1)

Technique

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

Notes sur la région

Inconnu

Détails

Marques

Printed on the proper front of the casing: "Uncal."/ "Sens."/ "Sens."/ Identifier above a knob, and measurements around it: "Gain Control/ 0/ 1/ 2/ 3/ 4/ 5/ 6/ 7/ 8/ 9/ Cal./ Direct Input/ Preamp. Input/ Input Section/ Attenuator/ Overload"/ Series of settings around a knob ranging from 3 mV to 300 V/ "Power/ Input/ Ref./ Insert Volt. Cal./ On/ Direct/ Preamp./ 50mV RMS/ Int./ Ext./ Push half to Release/ Measuring Amplifier 2 - 200 000 Hz/ Type 2606/ [logo]/ Brüel & Kjaer/ Copenhagen/ Output Section/ Attenuator/ Overload/ x 0.003/ x0.01/ x 0.03/ x 0.1/ x0.3/ x1/ Filters/ Ext./ 22.5 Hz/ 22.5 kHz/ Weighting/ D/ A/ B/ C/ Push half to Release/ Meter Function/ Peak Hold/ Imp. Hold/ Impulse/ RMS Fast/ RMS Slow/ Meter Reset/ Recorder/ AC/ DC"/ On the white meter: SA 0061/ 02-78"/ There are two rows of measurements, one in black and one in red/ "[logo]/ Sound Level/ Add to dB Reading"/ A row of numbers at the bottom ranging from 40 to 190 in increments of 10/ On the stickers on the proper front: "nt/ FOR/ INDICATION/ ONLY"/ "BNR [logo]/ ACOUSTIC DESIGN"/ "Bell-Northern Research [logo]/ L0011849"/ On the proper top of the casing: "L11849 BNR"/ On the three stickers on the proper top, left and right: "CALIBRATION/ [logo]/ VOID IF BROKEN"/ On the proper back of the casing: "Pol. Voltage/ Overload/ On Off/ Overload/ Relay/ Made in Denmark/ Pol. Volt.Adj/ 220V/ 240V/ 100V/ 115V/ 127V/ 150V/ [logo]/ Serial no./ 586709/ Insert Volt.Cal./ Ext.Filter Input/ Ext.Filter Output/ Fuse 5A/ 12 V DC/ AC/ o +/ Battery Input/ 12 V DC"/ On the sticker on the proper bottom: "[logp]/ BRUEL & KJAER CANADA LTD./ 90 Leacock Rd., Pointe Claire 700, Que./ PURCHASE/ DATE/ Mar26/76/ 2606/ 115 VOLT 60 HZ 30 VA/ WORK/ ORDER/ FUSE 1A"

Manque

Appears complete

Fini

Predominantly black casing with a light green panel on the proper front and a white meter with black and red markings. On the proper front are black markings, knobs, and switches, silver coloured metal connectors, and white, pink and grey stickers. On the proper left and right sides there are black synthetic handles that collapse almost flush with the top of the casing. On the proper back there are several white markings printed on to the casing. There is a white and blue sticker on the proper bottom and there are small, circular blue stickers with white markings on the proper top, right and left where parts of the casing join.

Décoration

S/O