99.3 - Chester
This station was originally WCMJ, debuting in late '69 with 2kw ERP @ 360' HAAT. For 8+ years, the station programmed country music and operated from a mobile home at the transmitter site north of Chester, just off Highway 321.
In 1978, the Schaffer automation system was moved from Chester to York, to the studios of sister station WYCL. WCMJ's calls were changed to WDZK, while WYCL's calls were changed to WBZK. In Chester, new studios/offices were built and all new equipment was installed. In York, the 980 studios were overhauled and converted to stereo.
In the fall of '78, K-99 hit the air. The FM was a full simulcast of the then daytime AM station's existing adult top-40 programming from 6AM-6PM, with FM programming originating from the new Chester studios from 6PM-6AM. The WBZK/WDZK calls were because FCC rules at that time would not permit (without a waiver) different licensees in different markets to share call letters (The stations had common controlling ownership, but different licensee companies), and the Commission had just begun allowing stations to be programmed up to 50% of their broadcast schedules from studios outside of their city-grade contour. The remaining 50% had to originate from the "legal" studio, which explains the dual studios.
I did afternoons and was the PD at WGCD for about 6 months (or was it 6 weeks?) in early '78, then moved to mornings at WBZK in late summer, continuing in that slot when the simulcast began. I had applied for a new FM outside Augusta in 1977, and left K-99 in the spring of '79 to build that station. I should've stayed in York!
The Sigmon family built WYCL into a hot little Top-40 station by the mid-60's. The station had a killer multi-track production room, a surprisingly well-equipped control room and an audio chain so tightly compressed that a pair of Amprex 4-400C modulators would only last about 3 months in the Collins 20V-3. If the last part of that sentence makes no sense to you, think about how my poor wife has suffered through these last 31 years!
Oh...for those that tuned into K-99 in those early years, the jingles were from one the earliest JAM packages...Priority One.