WPBZ-FM has an effective radiated power (ERP) of 6,000 watts, with its transmitter off Smultz Road in Glenmont, New York.

In the early 1970s, some FM stations around the country were experimenting with Free Form music hosted by youthful disc jockeys.

By early 1975, WQBK-FM began to air progressive rock, starting each afternoon at 4 p.m., with the earlier hours of the day still being a simulcast of WQBK.

During this period, the programming was harder-edged classic rock with a limited number of current songs, mainly new material from core artists of the time.

WQBK-FM was limited by its Class A signal that was hard to hear outside Albany, Schenectady, Troy and their close-in suburbs.

In 1994, Albany Broadcasting acquired WSHQ, an FM station at 103.5 MHz in Cobleskill, with a full Class B signal, running 50,000 watts, changing the call letters to WQBJ.

Two years later, Clear Channel Communications purchased Radio Enterprises, and increased voice-tracking and automation at the station as well as leaning towards harder-edged songs.

In December 2005, Howard Stern moved to Sirius Satellite Radio, causing a drop in the ratings for "The Edge".

On September 2, 2011, WKLI-FM flipped from variety hits to active rock adding new competition in the Albany market.

[4] Until July 2019, WQBK-FM had been longest-running commercial rock music station in the Albany radio market, predating WPYX by five years.

At the time of the format's move to WQSH, WQBK-FM's DJ line-up included The Free Beer and Hot Wings Show, Candace, Tigman, Vinnie and Nights with Alice Cooper.

On August 1, 2019, WQBK-FM ended stunting and launched a soft adult contemporary format, branded as "103.9 The Breeze", putting the station in competition with Pamal Broadcasting's WROW and WYJB.

On March 28, 2024, WPBZ changed to a hot adult contemporary format, branded as "Zoey 103.9" and featuring a presentation akin to that of a variety hits station.