WMJH AM 810 Rockford/Grand Rapids

Slogan/Positioner: La Poderosa 93.3

Format: Ethnic; Spanish

Contact this station through their web site, linked below: WMJH AM 810

Web site: miradiopoderosa.com

Technical Information:

HD Radio Status: no

Class: D
Daytime Power / # of Towers: 3,600 watts / 1, omnidirectional
Daytime operations only

Social Media:

External Links:

Call Sign History:

  • WMJH: 7/10/1996
  • WISZ: 11/10/1995
  • WBYY: 11/4/1991
  • WJPW: 1964

Call Sign Origin:

  • Majic 810 (prior format)

On Air Date: 1964

Owner: Birach Broadcasting

Office Telephone: (616) 949-0715


  • 10/2014: 'La Poderosa' Regional Mexican format returns to WMJH from WMFN AM 640 and eventually an FM translator on 93.3 is added.
  • 7/2013: Format change to Classic Hits as Super Hits 810 as Cano's Broadcasting (operating the station under a Local Marketing Agreement) moves the Super Hits format from WOAP Owosso, which in turn changes format to Spanish. 'La Poderosa' Regional Mexican format moves to Birach sister station WMFN AM 640 Zeeland.
  • 4/2012: Announced that Birach is selling WMJH and sister station WOAP 1080 Owosso to Cano's Broadcasting. Sale never closes.
  • 2004: Format change from Adult Standards to brokered Spanish/Regional Mexican 'La Poderosa'.
  • 11/2001: FCC approves sale to Birach Broadcasting
  • 9/2001: Announced that, along with sister station WMFN-AM 640 Zeeland, is being sold from Cook Media to Birach Broadcasting for $1.9 million
  • 200x: AM Stereo dropped

Center of antenna array/transmitter location:

Kent County






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