#727: WGRB Chicago IL 1390 verified my report from Feb. 23 today. John Bohem is RF Manager/Transmitter Supervisor, Chicago Region for the iHeartMedia Markets Group.
He says: “It’s always great to hear from listeners everywhere. We typically receive regular reception reports from Sweden, Finland and Norway, especially during the winter months. Now we receive one from Maine! We were still in DAY pattern when you heard us, however both DAY and NIGHT modes concentrate signal into the major lobe, which shoots over Chicago from the south side of the city at 9-degrees, from the transmitter site at 87th Street & Kedzie Avenue.
The main transmitter is a Harris DX-10, operating at 5400 watts into a 1986 Vector Technology (Phasetek) antenna phasing system, into a 4-tower parallelogram array. The audio processor you heard is an Orban 9200. The 4 towers are 101-degrees tall at 1.39 MHz, or about 200 feet long. “