We can swish the VFO back and forth to create the mark and space frequency!!! 73 & GUD DX, Thomas F. Giella W4HM Lakeland, FL, USA w4hm at tampabay.rr.com W4HM's Amateur & SWL Autobiography: http://www.w4hm.org --- This email is free from viruses and malware because avast! Antivirus protection is active. http://www.avast.com