Craig, There seems to be a growing number of hams using A.M. on both 80 and 40 meters. I heard one recently using a Hammarlund HX-50 transmitter. Sounded good. My HQ-180 manual suggests a Hallicrafters transmitter but says the Hammarlund transmitter will work as well . Maybe someone on the list can shed some light on this. I haven't rechearched this. Mike