Some people who had been using UHF-only antennas to receive digital TV signals have been reporting problems since the Digital TV switchover on June 12, 2009.

For example, in the Detroit market, all major networks had been broadcasting on UHF frequencies prior to June 12. A TV viewer would have been able to receive all major network stations using a UHF-only antenna, such as the Antennas Direct DB4 Multi Directional HDTV Antenna. However, on June 12, WJBK (known as FOX 2 Detroit), switched their RF broadcast frequency from 63 to 7, placing them squarely in the VHF band. Now people with UHF-only antennas will need to buy a new HDTV outdoor or indoor antenna simply to receive this one station.

If this has happened to you in your market area, you will need a VHF/UHF combination antenna, such as the Winegard GS-2200 Sensar III Amplified VHF/UHF Antenna System or the Channel Master 3671 VHF/UHF/FM Crossfire Antenna.

UPDATE: some viewers have reported that UHF antennas such as the Antennas Direct DB4 can receive higher VHF frequencies in their area. Some problems blamed on the antennas were actually caused by Windows Media Center not updating the RF channel information until a few days after the digital switchover. Be sure to install all updates and re-scan your channels, whether you are using Media Center or another solution.