> >I have a PIC 16Cxx that I'm using for an amateur radio application
> >[1].  I'm using a 20Mhz crystal, but it appears the PIC is not
> >functioning.  I wonder if I should go to a ceramic oscillator
> >instead.  Is there crystal "problems" that I should be aware of?
>
> Did you use a paralell resonant crystal, with the proper load caps?

The crystal I have is a 20Mhz clock crystal from Jameco.  The
schematic for the MIM only shows filtering caps from 5 volts to
ground.  There's one for the MIM and another for its EEPROM.  both
caps are 0.1 uF.

Lloyd

PS For those interested in the MIM, Dr Clement's phone number is
(410) 518-6591