Lamesa’s KPET 690 AM radio station is back on the air but still hobbling along after recently suffering failures involving both its main transmitter and a backup transmitter.But even as efforts continue on the station’s AM side, listeners can pick up the station’s broadcasts at 84.9 FM and streaming online through the station’s website, kpetradio.com, said David Stewart, general manager.While 690 AM returned to the air late Tuesday afternoon, Stewart said the broadcast is not as clear and not nearly as loud as normal.Work continues in an effort to improve the signal and the temporary arrangements that have been made ...