[2] For many years, the station's top-of-hour ID mentioned its coverage of parts of five states (New York, New Jersey, Pennsylvania, Connecticut, Massachusetts) and "an itty-bitty piece of Vermont".

The call letters were changed to WKIP-FM and the station adopted a full-time simulcast of WKIP's full service format.

In 1970 WKIP-FM was sold to Beacon Broadcasting, owner of WBNR, and took on new call letters: WSPK (Stereo Poughkeepsie).

With new owners came a 60% simulcast with WBNR that created a varied middle of the road/classical/beautiful music format which was commonplace on many FM stations at the time.

Country did not last long on the frequency and in the fall of 1974, WSPK adopted a Top 40 format under the moniker "10-47, More Music!

In the spring of 1977, WSPK again went after WPDH which had flipped from country to automated album-oriented rock (AOR) a year earlier with instant ratings success.

In 1978, SPK went to an unusual CHR/oldies hybrid called "Gold N' Stereo" combining music by Sugarhill Gang, Neil Diamond, The Who, Abba, Free, Prince, and the Monkees.

In 1979, Stew Schantz (who also had worked stints at WPDH, later WSPK program director) re-worked the station's image, branding it "K-104".

Nick Robbins also rocked the Hudson valley in K104s early Rock of the Hudson Days, Stew Schantz re-joined K-104 in 1988 after leaving the "Stew and John Morning Show" at WPDH, initially handling the afternoon drive before eventually moving into the midday slot.

Scotty joined the station in 1989 originally handling voiceover and commercial production work with weekend host (and later MD) Chris St. James.

With the exception of one year being at KHITS Tulsa, OK in 1998, Scotty Mac is the longest tenured air personality at the station, and is currently midday host and PD.

The sale to Pamal ended K-104's running of weekend shows such as Open House Party with John Garabedian, Classic Dance Tracks with Stevie T, as well as the K-104 Hometown Countdown.

After Schantz's departure, Brian Krysz took on the program director's responsibilities and hired Kent Bonham ("Woodman") to handle the K-104 morning drive.

Though in recent years weak competition has come in the form of WPKF and the station is a perennial #1, K-104 is still a dominant force in the Hudson Valley radio markets.

The late Stew Schantz is considered a pioneer in establishing this type of radio format, as he is listed as one of the notable program directors and disk jockeys in the Rock and Roll Hall of Fame (alongside Alan Freed, Dick Clark, Casey Kasem and many others, local and national).

Due to various problems keeping the station on the air and generating revenue with the Westchester signal, the simulcast ended one year later when the 107.1 frequency changed to adult album alternative as "107.1 The Peak".