North American Radio Broadcasting Agreement

The North American Radio Broadcasting Agreement, usually referred to as NARBA, is a treaty made in 1941 between the United States, Canada, Mexico, Cuba, the Dominican Republic and Haiti relating to the allocation of frequencies for AM radio stations in these countries. In accordance with the treaty, clear channel frequencies were set aside across the radio dial, at a rate of about one per 100 kHz, and the 1230, 1240, 1340, 1400, 1450, and 1490 channels were reserved mainly for local stations. The agreement also officially expanded the upper limit of the AM broadcast spectrum from 1500 kHz to 1600 kHz. It required that most existing AM stations change frequencies, resulting in a massive shuffling of radio station dial positions. The new frequencies took effect at 3:00 a.m. Eastern on March 29, 1941.

NARBA is no longer in effect. It has been superseded by working agreements made in the early 1980s between the U.S. and Canada and between the U.S. and Mexico, and by an ITU-sponsored agreement covering all of the Western Hemisphere.[1][2][3]

Among the most significant changes were:
Old Freq.
(kHz)
Station(s)Moved
(kHz)
New Freq.
(kHz)
540CBKunchanged540Canadian clear
550-680allunchanged550-680
690all, except CFRBunchanged690Canadian clear
CFRB860
700-720allunchanged700-720
730all, except CFPLunchanged730
CFPL—1570
—new Canadian clear740allocated to CBL which moved from 840
740-790allup 10750-790
—new Canadian clear800allocated to CKLW which moved from 1030
790-830allup 20810-850
840CBL—740
—new Canadian clear860allocated to CFRB
850-870allup 20870-890
—new Canadian clear900allocated to CHML (and CJBR)
880-970allup 30910-1000
980KDKAup 401020
990WBZup 401030
1000WHOup 401040
1010KQW (now KCBS)740KQW did not move until 1947
1020KYWup 401060
1030CFCN (now CBR)down 201010
CKLW800
1040WTIC
KRLD
KWJJ
up 401080
1050allup 201070CBA became a new Canadian clear on 1070
1060WBALup 301090
WJAGup 401110this was later traded for 780 with KFAB
1070-1150allup 301100-1180
1160WOWOup 301190
WWVAup 401170
1170WCAU (now WPHT)up 401210
1180KEXup 101190
KOB (now KKOB)770
WDGY (now KFAN)down 501130
WINS1010
1190WOAIup 101200
WSAZ930
WATR1320
1200-1450allup 301230-1480
1460KSTP
WSJV (now WTOP)
up 401500
1470KGA
WLAC
WMEX (now WWZN)
up 401510
1480KOMA
WKBW (now WWKB)
up 401520
1490KFBK
WCKY
up 401530
1500alldown 101490
1510CKCR (later CHYM)down 201490
1530W1XBS to WBRY
(later WTBY, then WQQW; now dark)
up 601590Since 1934 U.S. frequencies above 1500 had been
allocated only to four experimental stations that
broadcast with a signal 20 kHz wide for "high fidelity."
The stations were converted to regular broadcasting
(and regular call signs) with the NARBA frequency
move.
W9XBY to KITE
(now dark)
up 201550
1550W2XR to WQXR
(now WQEW)
up 101560
W6XAI to KPMC
(now KNZR)
up 101560
—new Canadian clear1570allocated to CFPL (AM)

See also

External links

References

19th century - 20th century - 21st century
1910s  1920s  1930s  - 1940s -  1950s  1960s  1970s
1938 1939 1940 - 1941 - 1942 1943 1944

Year 1941 (MCMXLI
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AM broadcasting is the process of radio broadcasting using Amplitude Modulation.

History

:
Main article: History of radio

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hertz (symbol: Hz) is the SI unit of frequency. Its base unit is cycle/s or s-1 (also called inverse seconds, reciprocal seconds). In English, hertz is used as both singular and plural.
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Eastern Time Zone (ET) of the Western Hemisphere falls mostly along the east coast of Northern America and the west coast of South America. Its time offset is UTC-5 during standard time and UTC-4 during daylight saving time.
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March 29 is the 1st day of the year (2nd in leap years) in the Gregorian calendar. There are 0 days remaining.

Events


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19th century - 20th century - 21st century
1910s  1920s  1930s  - 1940s -  1950s  1960s  1970s
1938 1939 1940 - 1941 - 1942 1943 1944

Year 1941 (MCMXLI
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International Telecommunication Union

International Telecommunication Union emblem

Formation May 17 1865
Headquarters Geneva, Switzerland
Membership United Nations
Official languages French, English, Spanish, Russian, Arabic, Chinese
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CBK

City of license Watrous, Saskatchewan
Broadcast area Southern and Central Saskatchewan
Branding CBC Radio One
First air date 1939
Frequency 540 kHz (AM)
Format public broadcasting
ERP 50,000 watts
Class A
Callsign meaning C
..... Click the link for more information.
CFRB

City of license Toronto, Canada
Branding Newstalk 1010
First air date February 19, 1927
Frequency 1010 kHz (AM)
6070 kHz (Shortwave)
Format News, Talk
Power 50 kW
Class A
Callsign meaning Canada's First Rogers
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CFRB

City of license Toronto, Canada
Branding Newstalk 1010
First air date February 19, 1927
Frequency 1010 kHz (AM)
6070 kHz (Shortwave)
Format News, Talk
Power 50 kW
Class A
Callsign meaning Canada's First Rogers
..... Click the link for more information.
CFPL

Broadcast area Primary: London, ON
Branding "AM980"
Slogan "News - Talk - Sports"
First air date 1922
Frequency 980 AM
Format News/Talk/Sports
ERP 10 kW
Class B
Callsign meaning Canada Free Press L
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CFPL

Broadcast area Primary: London, ON
Branding "AM980"
Slogan "News - Talk - Sports"
First air date 1922
Frequency 980 AM
Format News/Talk/Sports
ERP 10 kW
Class B
Callsign meaning Canada Free Press L
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CBLA-FM

City of license Toronto, Ontario
Broadcast area South-Central Ontario
Branding CBC Radio One
First air date 1925
Frequency 99.1 MHz (FM)
Format public broadcasting
ERP 98,000 watts
Class B
Callsign meaning Canadian
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CKLW

City of license Windsor, Ontario
Broadcast area Windsor, Ontario/Detroit, Michigan
Branding AM 800
Slogan CKLW — The Information Station
First air date May 31, 1932 as CKOK
Frequency 800 (kHz)
Format News/Talk
ERP 50,000 watts

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CBL is a TLA that could mean:
  • Calculator-Based Laboratory
  • Cambuslang railway station – see UK railway stations - C
  • Canadian Baseball League (defunct)
  • Cannabicyclol
  • Carl Barks Library
  • CBL & Associates Properties

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CFRB

City of license Toronto, Canada
Branding Newstalk 1010
First air date February 19, 1927
Frequency 1010 kHz (AM)
6070 kHz (Shortwave)
Format News, Talk
Power 50 kW
Class A
Callsign meaning Canada's First Rogers
..... Click the link for more information.
KDKA-AM

Broadcast area Pittsburgh, PA
Branding "Newsradio 1020 KDKA"
Slogan "The Voice of Pittsburgh"
First air date 1920
Frequency 1020 (kHz)
Format News/Talk
Power 50,000 watts
Class A
Owner CBS Radio
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WBZ

City of license Boston, Massachusetts
Broadcast area Greater Boston
Branding "WBZ NewsRadio 1030"
Slogan "Every Day"
First air date September 19, 1921
Frequency 1030 (kHz) (Also on HD Radio)
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WHO

Broadcast area Des Moines, Iowa
Branding NewsRadio 1040, WHO
First air date April 11, 1924
Frequency 1040 (kHz) (Also on HD Radio)
Format News/Talk
ERP 50,000 watts
Class A
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KCBS

Broadcast area San Francisco, California
First air date 1921 (experimental under various calls from 1909-21)
Frequency 740 (kHz)
Format All News
ERP 50,000 watts
Class B
Callsign meaning K
Columbia
B
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KCBS

Broadcast area San Francisco, California
First air date 1921 (experimental under various calls from 1909-21)
Frequency 740 (kHz)
Format All News
ERP 50,000 watts
Class B
Callsign meaning K
Columbia
B
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19th century - 20th century - 21st century
1910s  1920s  1930s  - 1940s -  1950s  1960s  1970s
1944 1945 1946 - 1947 - 1948 1949 1950

Year 1947 (MCMXLVII
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KYW

Broadcast area Philadelphia, PA
Branding KYW Newsradio 1060
Slogan "Listen two, three, four times a day" , "All news, All the time" and "You give us twenty-two minutes, we give you the world.
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CBR

City of license Calgary, Alberta
Broadcast area Southern Alberta
Branding CBC Radio One
First air date 1964
Frequency 1010 KHz (AM)
Format public broadcasting
ERP 50,000 watts
Class A
Owner Canadian Broadcasting Corporation
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CBR

City of license Calgary, Alberta
Broadcast area Southern Alberta
Branding CBC Radio One
First air date 1964
Frequency 1010 KHz (AM)
Format public broadcasting
ERP 50,000 watts
Class A
Owner Canadian Broadcasting Corporation
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CKLW

City of license Windsor, Ontario
Broadcast area Windsor, Ontario/Detroit, Michigan
Branding AM 800
Slogan CKLW — The Information Station
First air date May 31, 1932 as CKOK
Frequency 800 (kHz)
Format News/Talk
ERP 50,000 watts

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WTIC is the callsign for three broadcast stations in Hartford, Connecticut which were at one time under the same ownership, but no longer:
  • WTIC AM, 1080 kHz
  • WTIC-FM, 96.5 MHz
  • WTIC-TV, Channel 61

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KRLD

City of license Dallas, Texas
Broadcast area Dallas/Fort Worth Metroplex
Branding "NewsRadio 1080"
First air date 1926
Frequency 1080 kHz (Also on HD Radio)
Format News/Talk
Power 50,000 watts
Class A
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KWJJ

City of license Portland, Oregon
Broadcast area Northern Willamette Valley and Clark County, Washington
Branding 99.5 The Wolf
Slogan Great country for the great Northwest!
First air date August 191985
Frequency 99.
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CBA

City of license Moncton, New Brunswick
Broadcast area Eastern New Brunswick
Branding CBC Radio One Moncton
First air date 1939
Frequency 1070 kHz (AM)
Format News/Talk
ERP 50,000 watts
Class A
Callsign meaning C B
..... Click the link for more information.


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