Claim: KACH(1340 kHz) is a radio station broadcasting a Classic Hits format to the Preston, Idaho, United States area that first aired on 6 September 1948.
Evidence: KACH Preston, Idaho 1340 kHz Classic Hits September 6, 1948 (1948-09-06) 
KACH (1340 AM) is a radio station broadcasting a Classic Hits format to the Preston, Idaho, United States area. The station signed on the air September 6, 1948, as KPST.