Depending upon exactly your configuration its between 27 and 31 feet for the
ladder line on a 104ft g5rv. Of course, in the original British version the
ladder line connected directly to the tuner but because of rf problems etc. we
usually use a cable to connect with some kind of choke.
Tom
Tom Brennan KD5VIJ, CCC-A/SLP
web page http://titan.sfasu.edu/~g_brennantg/sonicpage.html