 After the transition, many viewers using "high-definition" antennas have reported problems receiving stations that broadcast on VHF channels.This is because some of the new antennas marketed as "HDTV antennas" from manufacturers such as Channel Master were only designed for channels 7–51 and are more compact than their channel 2–69 counterparts.These manufacturers did not anticipate widespread continued use of the relatively longer wavelength low-VHF channels.