Oops. Mike I meant to say get an XG2 3-Band 1-uV/50 -uV Receiver Test Osc, NOT the 2T-gen. The K3 has it's own built-in 2 tone test osc anyway. Thanks Brett for bringing that to my attention. My mistake; its past my bedtime HI. 73, Fred, AE6IC, (es GN)