Sorry. It’s been 25 years since being told the story and I have slept at least a couple of times since then.
Checking
www.cflradio.net, WDIZ is listed as top-40 in 1979, so they did indeed flip. However, no mentioned when it switched back to rock, but I'm guessing it was before spring of 1984 as I was in town doing my thing about that time --I believe. Regardless, WDIZ was no longer a threat to WBJW when I arrived on the scene.
The interesting point is that both WDIZ and Zeta did appear to have abandoned the format about the same time in the early 80's.
Why? Well, I joked that they were sharing the "18 to 24 year-old generally unemployed male" demo. That statement is probably not that far from the truth as in those days the format was only successful in the northern rust belt cities. Think Cleveland (WMMS), Pittsburgh (WDVE) and of course, Shamrock's WQFM in Milwaukee (which owned WDIZ). Those cities had an abundance of young blue-collar, hard rock’in, beer guzzling males that provided enough fodder to make those stations hit respectable numbers.
At the same time, taking a cue from southern fried rock, country was morphing and attracting that demo through out the south. This could explain the vacuum for a time as Orlando was a big country town in more ways than one in the early 80's.
It was the genius of the dynamic duo of Kent Burkhart and Lee Abrams that made album rock truly mainstream and successful. The one I had my fingers in at that time had a 15 share after Lee was done with it. There was some consternation in the ranks, as to achieve those numbers, the playlist got very tight.
It would be interesting to know if either WDIZ or WHTQ used Burkhart/Abrams. In my mind, the WDIZ/WHTQ matchup was the more interesting battle. Zeta and WJRR are from two completely different eras with almost two completely different demos.
My guess is WJRR is aimed at 18 to 34 and 25 to 44 respectively. Far older than what Zeta could ever do in the 70's.
Tx