General Information

Serial #

411434

Part Number

1

Total Parts

2

AKA

N/A

Patents

N/A

General Description

BRASS UPPER CASING & HANDLE; ALUMINUM RIBBON SUSPENDED IN MAGNETIC FIELD; PLASTIC COVERED MICROPHONE CORD

Dimensions

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

Length

38.0 cm

Width

29.4 cm

Height

16.0 cm

Thickness

N/A

Weight

N/A

Diameter

N/A

Volume

N/A

Lexicon

Group

Communications

Category

Radio

Sub-Category

N/A

Manufacturer

AKA

Marconi

Country

Canada

State/Province

Ontario

City

Toronto

Context

Country

Canada

State/Province

Unknown

Period

C.1950-1969

Canada

NONE

Function

TO PICK UP SOUND, VOICE & MUSIC AND CONVERT TO COMPLEX ALTERNATING CURRENT. THE ALTERNATING CURRENT WOULD BE EQUALISED AND AMPLIFIED TO MODULATE A BROADCAST TRANSMITTER.

Technical

THIS MICROPHONE ILLUSTRATES A VERY COMPLEX DESIGN FOR A SIMPLE CLOSE-TALKING MICROPHONE. IT IS INTENDED FOR ON-THE-SPOT NEWS REPORTING AND/OR INTERVIEWS. THE MICROPHONE UNIT IS SUPPORTED ON DAMPED SPRINGS TOABSORB VIBRATION AND PREVENT DAMAGE TO THE RIBBON. THE RIBBON IS POSITIONED BEHIND THE MAGNET STRUCTURE TO PREVENT EFFECTS OF DIRECT AIR PRESSURE THE EQUALISING UNIT (.2) CORRECTS FOR LOW FREQUENCY EMPHASIS WHEN A RIBBON MICROPHONE IS USED FOR CLOSE-TALKING.

Area Notes

Unknown

Details

Markings

'B.B.C.-MARCONI/ TYPE L/ PATT NO. 506668' INCISED IN HANDLE; 'INST. NO. 411434' INCISED IN OPPOSING SIDE/ 'CANNON ELECT DEV-CO LA CAL' INCISED IN CONNECTOR CASING; 'CANNON/ 2' INCISED ON PLUG

Missing

NONE

Finish

ANTIQUE BRASS ENAMEL FINISH

Decoration

N/A