Hi group, I did a fast check off power(s) to ground plane capacitance on the bare Atlas board. It ranges from approx. 100 pF for the +12V supply to approx. 200 pF for the +5V supply. The +3.3, -5, and -12 supplies run between 100 to 200 pF. 73 de Phil N8VB 1144350006.0