Hi RF Jim, Sean and all, Can someone introduce me to any good sites for antenna grounding? The problem with the system that needs fixing I think is with the radial ground network. The antenna is installed in a small island. The radial wires go into the sea, strong waves and current entrangles the whole network and breaks the wires. When this happens, the reflected power rise to 50%of transmitted power and tripped the transmitter. Is any other method of grounding (without needing to extend into the sea) that might solve this problem? Thanks in advance. BR, Ling SM -- http://www.piclist.com hint: To leave the PICList mailto:piclist-unsubscribe-request@mitvma.mit.edu