It would be hard to mistake DSL and/or cable TV leakage for power line noise. Your file is definitely a 60hz spark and most likely associated with power line hardware. Mike Martin RFI Services 6469 Old Solomons Island RD Tracy's Landing MD 20779 301-855-5961 Tel 410-741-5153 Fax 21*29180 Nextel mike@rfiservices.info www.rfiservices.info