General Information

Serial #

N/A

Part Number

1

Total Parts

1

AKA

N/A

Patents

N/A

General Description

WOOD CASE; IRON MAGNETS; BRASS & OTHER METAL WORKING PARTS; GLASS TOP

Dimensions

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

Length

49.0 cm

Width

24.5 cm

Height

27.0 cm

Thickness

N/A

Weight

N/A

Diameter

N/A

Volume

N/A

Lexicon

Group

Marine Transportation

Category

Communications

Sub-Category

N/A

Manufacturer

AKA

MARCONI

Country

England

State/Province

Unknown

City

London

Context

Country

Unknown

State/Province

Unknown

Period

EARLY 1900'S

Canada

EXAMPLE OF TYPE OF A DETECTOR USED IN CANADIAN SHIPS FROM ABOUT 1908, THROUGH WWI AND UP TO 1920.

Function

USED TO DETECT AND CHANGE A MODULATED WAVE IN SUCH A WAY THAT IT WILL HAVE THE SAME CHARACTERISTICS AS THE ORIGINAL WAVE. IT WOULD CONVERT THE RF SIGNAL TO AN AUDIO SIGNAL.

Technical

IT SUPERCEDED THE COHERER AND WAS FOUND TO BE MUCH MORE RELIABLE BECAUSE OF THE ABSENCE OF IMPERFECT CONTACTS. DISADVANTAGE WAS THE CONSTRUCTION WAS DIFFICULT. IT WAS SUPERCEDED BY THE CRYSTAL DETECTOR.

Area Notes

Unknown

Details

Markings

BESIDE KNOBS: 'E T T A' 'E [?] T A'

Missing

NAMEPLATE; WINDING KEY; 2 MAGNETS; BRAIDED WIRE BAND; GLASS FEED-THRU TUBES; 2 BINDING POSTS

Finish

WOOD STAINED & VARNISHED [NON-ORIGINAL VARNISH]

Decoration

N/A