multiples; Montreux 1939 (was to be effective 1940 but never implemented due to World War II );; Copenhagen 1948 (effective 15 March 1950) "European LW/MW Conference Copenhagen 1948 (European broadcasting convention)" Mostly 9 kHz (8 kHz above 1529 kHz 7, 8, and 9 kHz on LW) spacings but not harmonic multiples—offset 1 kHz on MW and (generally) 2 kHz on LW. See also AM radio Mediumwave MW DX Longwave North American Regional Broadcasting Agreement References External links GE75 Final Acts (including original plan) (PDF format) Bandplans Telecommunications treaties 1975 in radio Treaties concluded in 1975 Treaties of the People's Socialist Republic of Albania Treaties of Andorra Treaties of Bahrain Treaties of the Byelorussian Soviet Socialist Republic Treaties of Belgium Treaties of Bosnia and Herzegovina Treaties of Botswana Treaties of the People's Republic of Bulgaria Treaties of Burkina Faso Treaties of Cameroon Treaties of the People's Republic of China Treaties of Ivory Coast Treaties of Croatia Treaties of the Czech Republic Treaties of Denmark Treaties of Egypt Treaties of the Derg Treaties of Fiji Treaties of Finland Treaties of France Treaties of West Germany Treaties of Greece Treaties of the Hungarian People's Republic Treaties of Iceland Treaties of India Treaties of Ireland Treaties of Italy Treaties of Japan Treaties of Jordan Treaties of South Korea Treaties of Liechtenstein Treaties of Luxembourg Treaties of Malaysia Treaties of Malawi Treaties of Monaco Treaties of the Mongolian People's Republic Treaties of Montenegro Treaties of Morocco Treaties of the People's Republic of Mozambique Treaties of Myanmar Treaties of Nauru Treaties of Nepal Treaties of the Netherlands Treaties of New Zealand Treaties of Norway Treaties of Oman Treaties of Papua New Guinea Treaties of the Polish People's Republic Treaties of the Socialist Republic of Romania Treaties of the Soviet Union Treaties of Senegal Treaties of Serbia and Montenegro Treaties of Sierra Leone Treaties of Singapore Treaties of Slovakia Treaties of Slovenia Treaties of Spain Treaties of Sweden Treaties of Switzerland Treaties of North Macedonia Treaties of Tonga Treaties of the United Kingdom Treaties of the Holy See Treaties of Czechoslovakia Treaties of East Germany Treaties of Yugoslavia