In a message dated 7/21/2005 19:52:11 GMT Standard Time, rondec at easystreet.com writes: Some oscilloscopes are that way, especially the newer ones! Thanks again to all who responded. I have printed your advice and I think I have used the scope successfully to locate the culprit--a bad cap. Again, thanks...Ci Ci Jones WU7R FISTS 10789 NAQCC 306