Many thanks to all who replied to my light sensitivity problem.  I did
indeed try the metal tape over the PIC14000 JW part window and the results
dramatically improved over the black tape I had been using.  I am now
getting good solid 13 to 14 bit measurements out of the A/D and it is
working great.  I also lowered the impedance of my sensor output circuit and
added a couple of capacitors which helped a lot.  This PIC14000 is looking
to me like a pretty good device after all.            Dewey Davis