Frank Dresser wrote:
During the time both stations were testing, there were times in which both
WBBM and WSCR were both running IBOC at the same time and times in which
they were running IBOC alternately. I didn't think about it much at the
time, but I now wonder if they were trying to get both IBOC channels
broadcasting off the same antenna.

I suppose that's possible, but http://www.fybush.com/site-010801.html
confirmed my memory that the two stations' transmitter/antenna sites are
fairly far apart.

--
If John McCain gets the 2008 Republican Presidential nomination,
my vote for President will be a write-in for Jiang Zemin.