Assuming that your apartment has 3 wire AC outlets, and that your power supply has a 3 wire plug, let that be the equipment ground. Then sink the ground rod wherever the lightning arrester needs it to be. As John said, if you have an RF problem, put a quarter wave counterpoise for the band where the problem is on the ground screw of the radio, or of the tuner if you are using an external tuner. ----- Original Message ----- From: "Tom Brennan" <[log in to unmask]> To: <[log in to unmask]> Sent: Saturday, April 14, 2012 5:44 PM Subject: grounding question I'm living in an apartment where they've agreed to let me put up an antenna on a 14ft pole but they only want me to have a single grounding point for my system. I have a 9ft ground rod but I need both an rf ground to the radio itself and a ground for my lightning arrester on the antenna. Is there any way to ground these both to a single ground rod? Tom Tom Brennan KD5VIJ, CCC-A/SLP web page http://titan.sfasu.edu/~g_brennantg/sonicpage.html