wrote in message
ups.com...
I've started using PSpice as part homebrewing and design efforts. It
is very interesting, and a great way to check out ideas before
committing them to actual PC boards.

Some questions:

The version I downloaded has some limitations in the parts libraries.
For example, I can't find many of the common parts used by ham
homebrewers: MPf102 JFETS, NE602 mixers, etc. Where can I find the
PSpice models of these parts? Has anyone developed a library of ham
homebrew .MOD files for the parts we use?

I've (sort of) figured out how to put an impedance matching transformer
into the circuits. I select what they call a "non-linear" transformer

check out the banter at the sci.electronics.cad newsgroup --
you can also google spice models

oh, for transformers -- use a current dependent voltage source -- then you
can add coupling capacitance, primary and secondary leakage inductance
etc -- unfortunately it works down to D.C.