A futher comment to Jerry Cupples comments on "use the smallest wire you can" and James Moffitt's note amout checking for current capacity. On one design that I was involved in finding a "fix" for, a board redesign was determined not to be an option. (The driver ic didn't have enough "horsepower" to drive the routed line accross the pwb!) Analsys and test showed that a 27awg wire routed on the top of the pwb had half the capacitance of a trace inside the board. (about 2pf/in for a wire) I used the Pacific Numerics 2D "Parisitic Parameters" software & had good correlation with measured data. Bill Gaines AeroJet (for $) IHPVA (for speed & fun) IEPS (for info) SCCA (for trophys) [log in to unmask] =================================================== /| _ _ _ /_||_ |_ | / ||_ _| |_ ===================================================