95.5 K-Rock (call sign: 3CAT) is a commercial FM radio station based in Geelong, Australia. K-Rock operates a mainstream Top 40 rock-inclined playlist.
In 2010, the on-air line-up consists of K-Rock Brekky (Matt Bern / Paul "chicken" Dyer),Gordie Waters (9am-2pm), Aaron "Az Dawg" Chilcott (go to guy). Overnight shows include "World Party" Saturday nights and "Homebrew" Sunday nights.
K-Rock's football coverage mainly consists of Australian Football League matches involving the Geelong Football Club. Commentators include Ian Robertson, Andrew Bews and Wayne Schwass.
K-Rock shares transmitter facilities with sister station Bay FM (along with 94.7 The Pulse and 96.3 Rhema FM) - broadcasting from a high-powered transmitter on top of Murradoc Hill on the Bellarine Peninsula. The licence area covers the Greater Geelong area, Werribee and Western Melbourne, The Golden Plains, and the Surfcoast. K-Rock also streams online via their website.
From 1930 to 1990, K-Rock was known as 3GL on the AM band, broadcasting first on 1400 kHz, then 1350 kHz and later 1341 kHz. Although based in Geelong, it was notable for being receivable over most of the Melbourne metropolitan area.
3GL gave Happy Hammond his start in broadcasting in 1948 as a breakfast announcer. While at 3GL, Happy also made his first TV appearance in 1948, long before the Tarax show, as part of an exhibition using closed-circuit TV equipment for trial purposes. 
3GL has been the home of many well known names who formerly worked in Melbourne including Gene Fisk, Don Lunn and Denis Scanlan. The station was well known for its "3GL on the West Coast" slogan and associated jingles, many sung by Mike Brady of "Up There Cazaly" fame.
For many years, 3GL was based in James Street Geelong but relocated after being granted the right to convert to the FM band in 1990.
3GL was offered an FM conversion upon the entry to the Geelong market of competitor BAY FM. 3GL converted to FM to allow equal competition in the Geelong regional market, with the management of the former Geelong AM service agreeing to the transfer of service to the FM band in 1990. The station dropped the 3GL call sign in favour of 3CAT, an ID that was proposed by the radio station's head of football commentary Ted Whitten (who at the time was in the early stages of affliction of cancer). 3CAT as a call-sign never made it to air, being changed to K-Rock on the eve of its commencement on the FM band at 95.5 MHz.
K Rock's most successful lineup was in the mid-1990s featuring "Dave & Roxie on the Big Mattress" (Dave Gorr, Roxanne Bennett and Brendan Roberts' character voices), Steve Woods (also Program Director), Todd Austin, Frank Fursey & Wazza (Warren Penny). At its peak this lineup delivered record ratings in Geelong, Werribee and Western Melbourne with a blend of Classic Rock, Modern Rock and local personality.
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