Here is a URL (thanks to N4BP finding the web site) for Carl’s latest presentation on the low bands Worth the look: http://k9la.us/WWROF_-_Long_Overdue_Review_of_Gray_Line_Propagation_on_Low_Bands.ppt also for other presentations by Carl, Bob found this: http://k9la.us/html/webinars.html Thanks Bob, 73, PeteR N8PR