Hi Mark Don´t be surprised to find the sourse of your troubles outside the perimeter of your home! I have just recently located and fixed two white noise sources, the furthest one about 300' from the antenna. Both were NOT hump type sources, they were white noise covering many MHz all the way up to 6m (where they really bothered me) and beyond. The hump type are also all over the place but so far none has affected me directly, so I don´t bother with them. The sources I fixed were 1 - a BY built flourescent lamp reactor, 2 - a switching power supply of a home security system. I have also experienced a 1 -2 KHz wide hump on 21.075/6 which looks similar to the "regular" humps, but that one is generated inside the Flex3K. It is still there when connected to a dummy load. Maybe the Flex5K owner is looking at something similar. 73 Rolf PY1RO _______________________________________________ FlexRadio Systems Mailing List FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/ Knowledge Base: http://kc.flexradio.com/ Homepage: http://www.flexradio.com/