Hi all, The recent email discussions on grounding have been timely for me. Thanks to all of those emails and also the discussions at the Geeks lunch on Wednesday. I’ve got a recently installed roof tower on my garage (see http://www.w8io.com/rooftower.htm ) that I’ll soon be putting some antennas on. Yesterday I installed an 8 foot ground rod next to my house foundation for this tower. It took about 10 minutes to get the rod totally below ground level, using a borrowed 1-1/2” Milwaukee Heavy Duty hammer drill. The first 6 feet went real fast, but the last 2 feet went slow with most of my body weight on the drill. Many years ago I drove 8 foot rods in at the base of each leg of my large tower with a sledge hammer, and that was a much harder job. Today I measured the ground resistance to be about 12.2 ohms for the ground rod. I did this by measuring current with my Fluke multi-meter using the unfused 10 amp jack. I first measured current through a 50 ohm power resistor I had (2.6 amps). I next connected one end of the power resistor to the ground rod, the other resistor end to one Fluke lead, and the other end of the Fluke to the 120 source voltage. The current was 2.06 amps - going through the 50 ohm resistor plus the ground rod. The procedure I used is shown in this YouTube video: https://www.youtube.com/watch?v=6q2_kzXgtVg&t=277s So far I’m satisfied with this installation, since I will be connecting this ground rod to the service entrance rod about 20 feet away. I also still have to run wire from the short tower on my garage roof down to the ground rod. Any comments or suggestions? If anyone else has measure ground resistance, how did you do it? What kind of values did you get? Joe - WA8OGS