> i found some info on parallel capacitance. typical value seems to be > about 1nF/10m (1nF/30ft) > > unfortunately, i did not find any info on serial inductance. > what's the typical value here? Serial inductance depends a little bit on the construction of the cable. Typically a telephone copper cable with quads (diameter of copper is 0.8m= m) has around 80nF/km and 200=B5H/km. Hope this can help you. Regards Enrico --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist