One rod near the tower base and the other rod eight feet away. A good default would be to ground the mast for safety's sake. An elevated antenna or a tower protruding into the atmosphere naturally increases the odds of a lightning … Atlanta, GA. Denver, CO. New Castle, DE. Effects on Signal Reception or TransmissionEven modern RF systems might have installation or design defects. Entered via the ground rod and took out power supplies, confused a JRC NRD-525 receiver and a 144/440 transceiver, and small things to the tune of 4 figures. Falling short of that it is to dissipate as much energy as possible. The goal of a grounding rod is to make contact with the water table. Current Stock Status At These Ham Radio Outlet Locations. San Diego, CA. I am installing a ham radio and want to properly ground it. A protruding antenna Each has it's own set of requirements, but not all station setups need every kind of ground. First and foremost is for the safety of your family, home, and HAM equipment. For the full episode, visit http://twit.tv/show/ham-nation/134 The "ground bus" at the back of the radio bench is yet another piece of tubing, with short braided cables soldered to it for attachment to the radios, amplifiers, and antenna "Trans-Match". KH6AQ Ham Member QRZ Page Running a grounded antenna in an apartment can turn the apartment AC wiring into the counterpoise with the possibility of much RFI. Bonding All Building Grounds Power CATV Telco Shack Tower R O D R O D R O D R O D … The two rods in the ground just below the box, are 5 feet each providing an electrical 10 feet of grounding rod. Anaheim, CA. Whatever coupling there is from J to mast would setup currents differently depending on mast length and what's at the other end: ground or isolation. Antennas, experiments, engineering and other articles of interest to radio folks. Coax will run down the mast, across the roof, down the side, and enter the house within inches of ground level. I will have a 20' mast with a long wire antenna running 130+ feet out to the south. 10 gauge solid copper wire is used to ground the antennas. Presented is a method learned from other hams on how to install a ground rod with minimal or no hammering. Phoenix, AZ. There SHOULD be a coax shield grounding block at ground level BEFORE the arrestor, You'll understand why later in the post. Use 1" or two 5/8" pieces of copper tubing between the first tower rod and the tower. Bob heil gives tips on how to properly ground your equipment. Using a watering can, even children can sink an 8 foot ground rod into the ground. The far end will be about 45 feet above ground level. Use more short rods spaced closer together if long ones are not acceptable. Hi all, I'm setting up my station for the first time after a long break from radio. If a ground wire is run from the second story to earth ground, it needs to be a multiple of 1/2WL but like the 1/4WL counterpoise, it will radiate just like an antenna element. This ground line is not … Lightning Protection. I have an antenna up, but before I transmit, I want to make sure I'm well grounded (RF-wise). - 1 in. This grounding system addresses both the electrical ground and RF grounding requirements in Ham radio. Since well over 90 percent of the effective grounding occurs in the first 5 feet using two 5 foot ground rods instead of a single 10 foot ground rod works much better. All it takes is water and time. Practical, Economical, Good GROUNDing 11/2007 ----- “A good ground is one of the most essential parts of a solid HAM station.” There are various reasons for this statement. For now, enjoy the video of the kids learning how to use a 4 pound hammer!Please be sure to LIKE and SHARE our videos and to SUBSCRIBE to our channel! One of the key tenets of grounding your ham radio station is to eliminate ground loops. So ground to NEC, use good common mode RF chokes on your feedlines and you can also wrap non critical ground wires around ferrite cores to keep wall wart and similar noise from traveling through your ground system. Tower Grounding • Bury copper strap in concrete • Bond copper strap to rebar cage • Bond copper strap to tower legs • Bond each tower leg to at least two buried rods spaced radially –Rods at least 8 ft long –Spacing at least equal to their length • Concrete forms Ufer ground If one has an artificial ground box and the wire to ground is 1/4WL, neutralizing the reactance will not help as the RF resistance is sky high. Oakland, CA. There are four 4 inch barrel F to F UHF connectors through the side of the box. > >I have about a 50 foot run from my radio to the outside ground rod. A minimum of 3 ground rods in a triangle are required –one will not do it. Portland, OR. > > 50 feet of any wire will not work as an RF ground for anything other > than a quarter wave at 50 feet! Woodbridge, VA. HRO-J … All it takes is water and time. All it takes is water and time. The ground rod will be in addition to the buried ground radials for the vertical antenna. Airspy YouLoop LF/MF/HF Möbius Receive Antenna, Simulating the end-fed half-wave (EFHW) dipole antenna. Fortunately the 50 and 20 amp Astron power supplies were fine. HAM RADIO OUTLET HRO-J-1. I will be including a lightning arrester that will also go the the ground. Stray RF Suppression (or simply RF Grounding) 3. Use a perimeter ground even if not a complete loop. Problem. These defects can A collection of several ground rods spaced several feet apart (and tied together) is already installed near where the coax enters the house, with one rod being less than a foot from the entry point. 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