Robert, A little more info might help. What freq (k, s, x-band)? We follow different rules for different ranges. Call me @ (916) 353-5366 or we can do the E-mail pen -pal thing See Ya FNK [log in to unmask] > ---------- > From: Robert Moss[SMTP:[log in to unmask]] > Reply To: TechNet Mail Forum.;Robert Moss > Sent: Monday, August 25, 1997 10:51 AM > To: [log in to unmask] > Subject: [TECHNET] PCB related questions > > Hello, > > Ive been searching for good information about PCB materials, including > epsilon values, relationships > to frequency (Im working in the microwave range), and and available > design suggestions. Do you > know where I can find this information. > > sincerely, > bob moss > [log in to unmask] >