WDBM
Student radio station at Michigan State University
WDBM (88.9 FM), East Lansing, Michigan, United States, branded Impact 89FM, is a 2,000 watt, Class A, student-run college radio station at Michigan State University that broadcasts to listeners in the Lansing metropolitan area. The signal can be heard as far south as Jackson, Michigan, southeast almost to Brighton, and north to Alma (due 34 miles southwest of Midland), far beyond its 60 dBu service contour which represents its clearest signal. The station is the successor to the Michigan State Network, which in the 1970s was the nation's largest college carrier current radio network, and had studios in several MSU dormitories. The network was eventually consolidated to one carrier current station, WLFT ("Tune to the Left"), which broadcast from the former WKAR studios on the third floor of the MSU Auditorium Building. This was also the first home of WDBM-FM.
WDBM began broadcasting in 1989 with the moniker Impact 89FM, a name it still uses today. WDBM was originally licensed by the FCC with call letters WBDM on November 10, 1987. As told by the founding general manager, Gary Reid, someone wrote the call letters down as "WDBM". Marketing and promotional items were all created with these incorrect call letters. After the mistake was discovered, the station quickly found that the WDBM calls were available, applied to the FCC to make the change, and the new calls were granted on February 7, 1989.
WDBM is one of the few student-run college radio stations to broadcast 24 hours a day, 365 days a year.
“WDBM” enters the record as student radio station at Michigan State University. Crown Archives preserves that source wording while asking what WDBM, Student and radio can confirm, complicate or overturn.
Why this record matters
“WDBM” is worth following because a concise public description often conceals a longer documentary argument. Here, WDBM, Student and radio provides the most credible route into that argument.
The strongest evidence will usually combine a dated visual record with documents produced by the authority responsible for the place. The source revision retrieved here is dated Apr 11, 2026. The linked authority identifier is Q7948287. Authority coordinates are 42.706, -84.475. 4 of 4 selected statements include explicit references; 1 carry qualifiers and 0 use preferred rank. The first chronological checks are 1989 and 1987.
Modern boundaries and familiar names can conceal earlier jurisdictions or structures that do not align with the present site. The lead is largely declarative, so disagreement and counter-evidence require a deliberate search beyond the opening account. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.
How to read it
Treat names, boundaries and functions as historically changeable. Maps, plans, inventories and administrative records can clarify what the place meant at different dates.
- Historic place names
- Jurisdictional context
- Routes into maps and plans
Contemporary maps, plans, listed-building records, estate papers and the responsible local or national archive.
Three-step research path
- Establish the record: confirm the title “WDBM”, its source revision and the description used here.
- Expand the search: follow WDBM primary sources, WDBM archive and WDBM research across catalogues and specialist indexes.
- Test the account: compare the strongest cited source with the responsible institution’s current record and note any disagreement.
Questions for further research
- Which source most directly establishes the central claim about “WDBM”?
- Which authority defined the place, boundary or structure at the relevant date?
- Which earlier names or jurisdictions may reveal additional records?
Search terms from this dossier
This entry incorporates text from “WDBM” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.