I've created a 2.2 MB zip file which contains: 1) The 18-page K5IU "Cross-Flow Principle" article extracted from the CQ Spring 1993 issue. 2) A reformatted (easier to read) version of K7NV's Towertalk posting from 16 Aug 1998 on the subject. Available for download here: http://ac6la.com/adhoc/Cross-Flow.zip Dan, AC6LA