[Rickertsen2]

Originally Posted by Al Skierkiewicz

James,
Again you have to really refer to the data sheet on the PIC. It describes a variety of oscillator circuits. When a crystal refers to capacitance it is referring to the maximum loading (capacitance in parallel with the crystal) that the crystal will oscillate reliably with. When the crystal is referred as series, it is cut to only work with series fed oscillator circuits. The PIC data sheet specifically calls for a parallel cut crystal or resonator. It also lists the crystals that were tested for various frequencies. Unfortunately none of your selection was on the list.
As you page through the catalogs and manufacturers websites, you will see crystals marked for overtone operation and the intended frequency range. The PIC data sheet has a lot of info. For other crystal oscillators you need to get a textbook to help you. I use the Radio Amatuer's Handbook (pub. Amateur Radio Relay League or ARRL) a lot for this kind of help and your library should have a recent copy as well as other electronics books on oscillator design and layout.

I looked up crystal oscillators in a few of my books (including the 2003 ARRL handbook) and it was quite insightful.