I agree wholeheartedly with Dan about QUCS. It was one of my great software discoveries of last year, and has proven _at least_ the equal of Spice for general analogue design. I have an expensive software suite for RF design for my work, but I find myself moving towards QUCS for many 'quick look' RF simulation tasks. A surprising number of my clients have started using the software after I've mentioned it.
If I spoke VHDL, I'm sure QUCS would get even more use. That's one of my next learning tasks! Best wishes Chris Bartram GW4DGU - FWIW!
