Andrew Rossmann wrote:

In Chicago, WBBM 2.1 and 2.2 are now duplicated on WMEU 48.3 and 48.4.
That was probably done due to issues with them being on RF12 (VHF Hi)
and many people using antennas that are UHF only. WMEU is a low-power
Class D station, but it transmits from the Willis (Sears) tower and has
pretty good range.

Thanks for passing that tidbit along, you are correct.

-bruce