"The biggest variable will be the velocity factor." If you determine the length electrically, you will already have the electricallength. If you need the physical length, then multiply electrical length times the inverse of the velocity factor. -- Joe Leikhim Leikhim and Associates Communications Consultants Oviedo, Florida JLeikhim@Leikhim.com 407-982-0446 WWW.LEIKHIM.COM