Loved your commentary, Michael. "You are right, Sir." Only model when deemed appropriate, which does require some smarts and experience to make that judgement. I also have had many of my clients complain about "maintenance" fees of software that is used10-15% of the time. Fortunately, some software has a "one-time only" cost, such as Micro-Cap 8 (which I use) at just under $4,000. I also use Linpar and Multlin for 2D modeling and generating Z-matrices or S-parameters for lossy, coupled, multiconductor transmission lines. Multlin also provides SPICE output files of the lossy, coupled lines. Their outputs integrate easily into MC8 (and earlier Micro-Cap versions). Mike Michael L. Conn Owner/Principal Consultant Mikon Consulting *** Serving Your Needs with Technical Excellence *** ------------------------------------------------------------------ To unsubscribe from si-list: si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field or to administer your membership from a web page, go to: //www.freelists.org/webpage/si-list For help: si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field List FAQ wiki page is located at: http://si-list.org/wiki/wiki.pl?Si-List_FAQ List technical documents are available at: http://www.si-list.org List archives are viewable at: //www.freelists.org/archives/si-list or at our remote archives: http://groups.yahoo.com/group/si-list/messages Old (prior to June 6, 2001) list archives are viewable at: http://www.qsl.net/wb6tpu