Doug Smith W9WI wrote:
Yes, they're using one of WGCI's towers. The listed coordinates of WGCI
are 41-44-13N/87-42-00W; those of WRLL are 41-44-14N/87-42-04W.

That would be east of Kedzie Avenue, between 85th and 87th Streets,
according to Street Atlas 8.

If I read the FCC database record for WGCI properly, they're using a
four-tower array with three towers in a line stretching WNWESE and a
fourth tower NNE of the center tower. My guess is WRLL is using the
westernmost tower.

The site appears to be on the north side of Roosevelt Road in the
general vicinity of Central Avenue:

I haven't been there in a long time, but I don't recall either any
antennas there or any place they could have been put.

--
It is possible to distinguish between a referral and a NXDOMAIN
response by the presense of NXDOMAIN in the RCODE regardless of the
presence of NS or SOA records in the authority section.
-- RFC 2308