jw\ wrote...

Agreed, John, 150 MHz is damned near DC for a lot of us, but as
yet I have no answer from the "spice" folks for the 1 nf capacitor
question. A lot of fancydancing but no answers.

Spice, smice. You got good answers. Wake up, spice is just an
engine to run your component models in circuits of your making.
Once one gets beyond the "toy" level of using spice it becomes
necessary to vet and complete the models of all your critical
components, including parasitic circuit elements. Want a good
RF capacitor model, you do well to make it yourself, from the
manufacturer's data and info, and from your understanding of the
part, aided by theory and bench measurements. Then vet your model
with more bench measurements. Thinking about component leads and
PCB wiring? Hey, you need to explicitly add all these into your
circuit. Just don't blame any resulting shortcomings on "spice."


--
Thanks,
- Win