General Information

Serial #

49085

Part Number

1

Total Parts

1

AKA

Microammeter

Patents

N/A

General Description

Molded bakelite case and adjustment screws. Glass window. Metal scale, screws and binding posts.

Dimensions

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

Length

9.1 cm

Width

7.3 cm

Height

4.1 cm

Thickness

N/A

Weight

N/A

Diameter

N/A

Volume

N/A

Lexicon

Group

Communications

Category

Service-test equipment

Sub-Category

N/A

Manufacturer

AKA

Ferranti

Country

England

State/Province

Unknown

City

Unknown

Context

Country

Worldwide

State/Province

Unknown

Period

1940-1960

Canada

Used for Canadian radio astronomy research at the National Research Council of Canada.

Function

Used to measure low levels of AC current in microamperes, over a range of 20 to 6000 Hz. For instance, atmospheric noise and/or radio frequency magnetic waves generated by stars and amplified to a level that could be measured by this meter.

Technical

British-made permanent magnet moving coil type AC portable microammeter. This moving coil instrument uses a rectifier to convert the AC current into DC current which it can measure.

Area Notes

Unknown

Details

Markings

Printed on face: 'FERRANTI/ A.C. MICROAMPERES/ RECTIFIER/ INSTRUMENT/ MADE IN ENGLAND TYPE NO. 350P./ PATENT NO. 285633 VD=0:7/ 20-6000 NO. 49085'

Missing

Meter glass, to be reset. Meter defective. May be defective instrument rectifier. From CA of 01/09/2002 by David Daley: No - Complete

Finish

Glossy black bakelite case; silver coloured meter face with black calibration.

Decoration

N/A