General Information

Serial #

40

Part Number

1

Total Parts

1

AKA

N/A

Patents

N/A

General Description

WOOD CASING WITH METAL PARTS/ METAL INTERIOR PANEL WITH SYNTHETIC CONTROLS, METER CASINGS & WINDOWS, PARTS/ METAL SWITCHES, PARTS

Dimensions

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

Length

51.0 cm

Width

24.6 cm

Height

27.5 cm

Thickness

N/A

Weight

N/A

Diameter

N/A

Volume

N/A

Lexicon

Group

Communications

Category

Sound

Sub-Category

N/A

Manufacturer

AKA

Western Electric

Country

United States of America

State/Province

California

City

Hollywood

Context

Country

Canada

State/Province

Quebec

Period

1950'S+

Canada

EQUIPMENT USED IN ENGINEERING DEPT. OFNATIONAL FILM BOARD OF CANADA. CREATED IN 1939, NFB IS PUBLIC AGENCY THAT PRODUCES & DISTRIBUTES FILMS & OTHER AUDIOVISUAL WORKS WHICH REFLECT CANADA. AT ONE TIME WELL FUNDED BY GOV'T, NFB HAD GOOD QUALITY EQUIPMENT BY WELL KNOWN MFRS.

Function

WITH INTERMODULATION ANALYSER (951578), USED TO TEST AUDIO DEVICES FOR DISTORTION CAUSED BY INTERMODULATION (MODULATION OF ONE FREQUENCY BY ANOTHER). SIGNAL GENERATOR SENDS TWO COMBINED FREQUENCIES THROUGH DEVICE BEING TESTED, & OUTPUT IS FED TO ANALYSER WHERE PERCENTAGE OF INTERMODULATION IS MEASURED.

Technical

EXAMPLE OF ACOUSTICAL TEST EQUIPMENT OF 1950'S, PART OF EQUIPMENT OF AUDIOVISUAL PRODUCTION FACILITY.

Area Notes

Unknown

Details

Markings

GREY LETTERING ON INTERIOR PANEL READS "Western Electric"/ RA-1257/ INTERMODULATION ANALYZER" & FOR CONTROL FUNCTIONS/ BLACK LETTERING ON METER READS "WESTON ELEC. INST. CORP. NEWARK N.J. U.S.A./ WESTERN ELECTRIC/ RA-1338/ MODEL 731", WITH "RA-1335" & "RA-1339" ON OTHER METERS

Missing

CASING HARDWARE From CA of 02/18/2002 by David Daley: Undetermined - probably missing cord, carrying handles and lid closures

Finish

LIGHT BROWN COATED WOOD/ CHARCOAL GREY INTERIOR PANEL/ BLACK SYNTHETIC/ COLOURLESS, TRANSPARENT WINDOWS/ RED LIGHT/ METALLIC PARTS

Decoration

GREY LINE AROUND EDGE OF CONTROL PANEL