![[photo, WYPR, 2216 North Charles St., Baltimore, Maryland]](/msa/mdmanual/01glance/images/1198-1-1772b.jpg)
WYPR, 2216 North Charles St., Baltimore, Maryland, April 2007. Photo by Diane F. Evartt.
![[photo, WNAV Radio Station, 236 Admiral Drive, Annapolis, Maryland]](/msa/mdmanual/37mun/annapolis/images/1198-1-07364b.jpg)
Efficient ways to communicate messages quickly over great distances evolved over the years from signal fires, to flagmen in towers, and to more mechanized towers using wooden arms. In England by 1838, studies in electricity and communication merged, enabling the first telegraph design to use electricity for sending messages through wires over many miles. Thereafter, Samuel Morse created a faster, and much simpler, and accessable telegraph, as well as a translation code that would become international. Maryland was at the forefront of this new technology, and the first American commercial telegraph linked Baltimore and Washington, DC, in 1844.
WNAV Radio Station, 236 Admiral Drive, Annapolis, Maryland, September 2015. Photo by Diane F. Evartt.
As technology improved, radio towers replaced telegraph poles. The first radio stations served as emergency communication posts for government and, later, private companies, predominatly for the U.S. Navy and for nautical applications, such as shipping, and cruise lines. These early stations, however, were limited: the technology broadcast on all frequencies, and more powerful signals could effectively block less powerful ones. With further development frequencies were isolated, and frequency specific signals used. Thereafter, a commercial market opened, and the public literally could "tune-in" to radio.
Today, dozens of public and commercial radio stations operate in Maryland. Alongside them, hundreds of "ham" stations, run by amateurs (under Federal Communications Commission (FCC) guidelines), provide frequently needed emergency communications, which function when other systems fail. Among such ham operators are the W3ADO Amateur Radio Club at the U.S. Naval Academy, and the Anne Arundel Radio Club, based in Davidsonville.
Though primarily known for Maryland Public Television (MPT), the Maryland Public Broadcasting Commission also is authorized to develop radio programming (Code Education Article, sec. 24-205).
COMMERCIAL RADIO
AM FREQUENCIES
- 560 am (WFRB), Frostburg (Forever Media)
- 570 am (WWRC), Bethesda (Salem Media Group)
- 600 am (WCAO), Baltimore (iHeartMedia, Inc.)
- 680 am (WCBM), Baltimore (WCBM Maryland, Inc.)
- 700 am (WDMV), Walkersville (Birach Broadcasting Corp.)
- 750 am (WBMD), Baltimore (Family Radio)
- 810 am (WYRE), Annapolis (Richard Dent)
- 820 am (WWFD), Frederick (Hubbard Broadcasting)
- 840 am (WKDI), Denton (Positive Alternative Radio, Inc.)
- 860 am (WFSI), Baltimore (Family Radio)
- 900 am (WCLM), Laurel (Alejandro Carrasco)
- 930 am (WFMD), Frederick (Connoisseur Media)
- 950 am (WCTN), Potomac (Win Radio Broadcasting Corp.)
- 960 am (WTGM), Salisbury (iHeartMedia, Inc.)
- 970 am (WAMD), Aberdeen (Bill Parris)
- 1010 am (WOLB), Baltimore (Urban One)
- 1030 am (WWGB), Indian Head (Good Body Media, LLC)
- 1050 am (WMSG), Oakland (Broadcast Communications II, Inc.)
- 1090 am (WBAL), Baltimore (Hearst Corporation)
- 1160 am (WMET), Gaithersburg (La Promesa Foundation)
- 1230 am (WRBS), Baltimore (WRBS-AM, LLC)
- 1230 am (WCMD), Cumberland (West Virginia Radio Corp.)
- 1240 am (WCEM), Cambridge (Draper Holdings Business Trust)
- 1240 am (WJEJ), Hagerstown (Hagerstown Broadcasting Company)
- 1270 am (WCBC), Cumberland (Cumberland Broadcasting Company)
- 1300 am (WJZ), Baltimore (Audacy, inc.)
- 1320 am (WJKI), Salisbury (Edwin G. Andrade)
- 1330 am (WHGM)