Aug 12, 2006 · The BC-348 is a rugged, 8-tube, single conversion, superheterodyne receiver. It covers 200 kHz to 18 MHz, segmented into 6 bands. The AM broadcast band is omitted, probably because of the 915 kHz IF frequency. The radio features a BFO for copying CW (Morse), a crystal filter to reduce adjacent signal interference, and a switchable Auto/Manual AVC.