Mediumwave broadcast stations (aka “AM Radio” in many parts of the world) have a special spot in my heart, because they were my first introduction to the world of DX radio, listening late at night as a child to clear channel stations in far-off locales like Chicago and New Orleans. Station spacing is at 10 khz in the Americas but at 9 khz in the rest of the world. MW transmissions travel much farther at night; consequently medium wave stations in North America are given licenses with different privileges, including lower power day-time only stations, higher power regional stations, and maximum power clear channel stations which can be heard for hundreds of miles.—Mediumwave broadcasting is declining in many parts of the world, however it still serves as the most economical form of long-distance radio broadcasting in many parts of the world. Many medium wave enthusiasts in North America attempt to log a station from each US state and Canadian province. A good way to start is to try to snag the powerful clear channel AM stations at night.
Update #3: (December 16, 2016) Fixed typos. Reorganized structure of Resources section. Added many links to resources page.
Update #2: (December 16, 2016) First public release, Fixed minor coding issues, added links to wikipedia articles for North American clear channel stations, added medium wave directory for 25+kw stations in Cuba.
Update #1: (December 14, 2016) Beta Version
Compiled by KG5JST
Compiled from multiple sources by KG5JST
A global longwave, mediumwave, tropical bands and shortwave radio database
William Hepburn's Radio & TV DX Information Centre - several lists of stations in different regions of the world
Despite the name, this website also provides extensive search features for Mediumwave/AM broadcasts
South and South-East Asia radio and TV Directories (including MW radio)
a summary of the hobby
a website about the "Distant AM Station reception hobby 150kHz to 1800kHz"
a good introduction to the hobby for beginners
Ontario DX Association
Describes itself as "Links, logs, photos, and more for the broadcast DXer since 2000"
My favorite feature is the map of Cuban MW transmission sites
"News, Reports and Loggings from the Long and Medium Wave bands," by Ydun in Denmark
SWLing.com is a community blog that focuses on Shortwave radio, however there are some good blog posts about mediumwave dx that are linked here
A blog with lots and lots of good links and resources
The following is a list of currently operational Clear Channel Mediumwave Stations in Canada, USA, Mexico and Bahamas. Most stations broadcast with a night-time strength of 50 kw, but some stations (particularly outside the USA) broadcast at higher or lower power.
940--testing or silent as of Oct. 2016 --Montreal, Quebec
1000--XEOY--Mexico City, D.F.
1040--WHO--Des Moines, Iowa
1070--KNX--Los Angeles, CA
1130--WBBR--New York, New York
1200--WOAI--San Antonio, Texas
1220--XEB--Mexico City, D.F.
1520--WWKB--Buffalo, New York
1550--silent due to license issue as of late 2016 XHRUV--Xalapa, Veracruz
1560--WFME--New York, New York