hi pedro: you can see the scan here: http://home.att.net/~btuttleman1/fig6.gif my emails to you bounce back. tnx, barry carson city, nv -- Barry Tuttleman Carson City, Nevada electronics-related website: http://home.att.net/~btuttleman2/electron.html industrial-related website: http://home.att.net/~btuttleman/barrysite.html