WJJK 104.5WJJK logo.png
Broadcast areaIndianapolis metropolitan area
Frequency104.5 MHz
BrandingClassic Hits 104.5 WJJK
FormatClassic hits
First air date
September 25, 1950; 71 years ago (1950-09-25) (as WAJC at 91.3 MHz)
Former call signs
WAJC (1950–1993)
WGRL (1993–1997)
WGLD (1997–2005)
Former frequencies
91.3 MHz (1950–1956)
Call sign meaning
W J JacK (former JACK FM branding)
Technical information
Facility ID28609
ERP50,000 watts
HAAT150 meters (490 ft)
Transmitter coordinates
39°50′24″N 86°10′34″W / 39.840°N 86.176°W / 39.840; -86.176Coordinates: 39°50′24″N 86°10′34″W / 39.840°N 86.176°W / 39.840; -86.176
WebcastListen Live
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WJJK (104.5 MHz) is a commercial FM radio station licensed to Noblesville, Indiana, and broadcasting to the Indianapolis metropolitan area. It is owned by Cumulus Media and broadcasts a classic hits radio format. The studios and offices are on North Shadeland Avenue on the east side of Indianapolis.

WJJK has an effective radiated power (ERP) of 50,000 watts, the maximum for most stations in Indiana. The transmitter is on Bulldog Road, near the athletic fields for Butler University, which once owned the station.[1] WJJK is licensed to broadcast in the HD radio (hybrid) format.[2][3]


On September 25, 1950; 71 years ago (1950-09-25), the station signed on the air. It began as WAJC, with the call letters standing for Arthur Jordan College of Music. It was originally a non-commercial, college radio station at 91.3 MHz. It moved to its current frequency of 104.5 MHz in 1956, as the Butler University radio station.[4] The move came with an increase in power to 8,800 watts, but still just a fraction of its current output.

In 1993, Butler University decided to discontinue its radio station. The 104.5 frequency was sold to the Susquehanna Radio Corporation, which converted it to a commercial radio station. Susquehanna changed the call letters to WGRL and it adopted a country music format. The country sound lasted four years.

The call letters were changed to WGLD in 1997 when the station flipped to an oldies format as "Gold 104.5." In 2005, WGLD became WJJK, dropping oldies and subscribing to the nationally syndicated "JACK FM" adult hits format. The station became known as "104.5 Jack FM."

In 2006, Susquehanna Radio was acquired by current owner Cumulus Media. Also in 2006, in September, WJJK became a classic hits station, while keeping the same call letters, marking a return to a format similar to that of the former Gold 104.5 oldies format. The name "Jack" was dropped in December 2007 and it is now known as "Classic Hits 104.5 WJJK."


  1. ^ Radio-Locator.com/WJJK
  2. ^ "Station Search Details". licensing.fcc.gov.
  3. ^ http://hdradio.com/station_guides/widget.php?id=41 HD Radio Guide for Indianapolis
  4. ^ Broadcasting Yearbook 1958 page A-280