General Information

Serial #

321

Part Number

1

Total Parts

1

AKA

N/A

Patents

N/A

General Description

ALUMINUM FRAME & REMOVEABLE PANELS. METAL TUBE AND POWER RESISTOR SOCKETS. GLASS, METAL & SYNTHETIC (BAKELITE)FITTINGS & COMPONENTS.

Dimensions

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

Length

71.2 cm

Width

76.2 cm

Height

181.0 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

Québec

City

Montréal

Context

Country

Canada

State/Province

Quebec

Period

THIS TYPE OF TRANSMITTER USED C. 1934 TO C. 1960.

Canada

MANUFACTURED IN CANADA, TO DOC SPECS. USED IN MONT JOLI, PQ SUB STATION.

Function

TO CONVERT 115V 60HZ ALTERNATING CURRENT TO A MODULATED BEACON SIGNAL IN THE LONG WAVE RADIO FREQUENCY BAND (450-500 KHZ). USED TO ASSIST PILOT IN LOCATING AIRPORT WHEN VISIBILITY IS LIMITED.

Technical

TRANSMITTER ELEMENT OF SIMPLE RADIO SYSTEM WHICH ENABLED A PILOT TO LOCATE AN AIRPORT DURING POOR VISIBILITY. ONE UNIT TRANSMITTED AN "A" IN MORSE CODE (".-"); THE OTHER AN "N" ("-."). IF THE PILOT HEARD A STEADY TONE FROM HIS BEACON RECEIVER, HE WAS CENTERED ON THE AIRPORT APPROACH. IF HE HEARD A PREDOMINANT "A" (.-) OR PREDOMINANT "N" (-.), HE WAS LEFT OR RIGHT OF APPROACH CENTRE.

Area Notes

Unknown

Details

Markings

All contols, etc. labelled. Mfr's plate located in upper left of cabinet front reads " 400W. AIRWAYS BEACON TRANSMITTER/ TYPE 84520-E SERIAL 321/ VOLTS 115 CYCLES 50/60 AMPS 25 P.F. 90%/ MANUFACTURED FOR/ DEPT. OF TRANSPORT/ CANADA/ BY/ CANADIAN MARCONI COMPANY ".

Missing

HIGH POWER RF AND AF VACUUM TUBES; FREQUENCY CONTROL CRYSTALS; AUDIO TONE SOURCE CHASSIS; OVER CURRENT RELAY COVER; POWER TRANSFORMER & FILTER CHOKES. NB: FRAME BENT.

Finish

BLACK WRINKLE FINISH ON CASING.

Decoration

N/A