General Information

Serial #

764 (.1)

Part Number

1

Total Parts

2

AKA

N/A

Patents

N/A

General Description

WOOD CASE, BAKELITE TOP PANEL, MILLIAMP METER, ROTARY STEP SWITCH & RESISTORS/ COPPER OXIDE RECTIFIER

Dimensions

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

Length

25.4 cm

Width

12.7 cm

Height

11.4 cm

Thickness

N/A

Weight

N/A

Diameter

N/A

Volume

N/A

Lexicon

Group

Communications

Category

Radio

Sub-Category

N/A

Manufacturer

AKA

General Radio

Country

United States of America

State/Province

Massachusetts

City

Cambridge

Context

Country

North America

State/Province

Unknown

Period

1934-1950

Canada

Unknown

Function

USED TO MEASURE THE POWER LEVEL OUTPUT OF AUDIO FREQUENCY AMPLIFIERS, TRANSMISSION LEVEL OF AUDIO FREQUENCY TRANSMISSION LINES ETC.

Technical

ONE OF MANY LEVEL METERS MANUFACTURED FROM 1930 ON.

Area Notes

Unknown

Details

Markings

.1: PRINTED ON TOP PANEL: 'POWER LEVEL INDICATOR/TYPE 586-CM SERIAL NO. 981/ GENERAL RADIO CO./ CAMBRIDGE MASS. U.S.A./ U.S. PATENT 1,901,344/ REF.LEVEL=0.006 WATTS/ CALIBRATED FOR 500 OHM LINES'/.2 SAME EXCEPT: 'SERIAL NO. 764' [NOT U.S. PAT. LINE]'/.1 METER: 'DECIBELS/ GENERAL RADIO CO./ MF'D BY/ WESTON ELECTRICAL INSTRUMENT CORP., NEWARK N.J. U.S.A./ MODEL 600 NO. 5064/ G.R. TYPE 586-01'/.2 SAME EXCEPT: 'NO. 4110'/ CALIBRATED METER & DIAL/ CHART ON BOTTOM INCLUDES: 'TYPE 586 POWER-LEVEL INDICATOR/.../ LOAD RESISTANCE-OHMS/GENERAL RADIO COMPANY/ CAMBRIDGE A, MASSACHUSETTS/ Form 223A'

Missing

N/A

Finish

BOX, CLEAR VARNISH OVER MAHOGANY STAIN/ TOP PANEL, BLACK NATURAL BAKELITE/ METER CASE, BLACK BAKELITE, METER CALIBRATION BLACK ON WHITE/BOX CALIBRATION INFORMATION ENGRAVED INTO BAKELITE WITH WHITE FILLER

Decoration

N/A