Counterpoise Or Ground Rod
see detail sheet e-003. Speaking in terms of effective radiated power, a 5 watt HT with rubber duck antenna held at shoulder height is actually only radiating 1. (Read more here) For those in "average" soil conditions, a single ground rod with counterpoise wires should be sufficient, provided a variable termination is used. The model 3301C antenna consists of an stainless steel rod, a counterpoise 61 cm x 61 cm (24 in x 24 in), a broadband high input impedance amplifier built into the base, and an AC power adapter for battery charging (nominal 90 to 265 VAC, 50/60 Hz). This spreads the electric current along several paths as well as providing redundancies. Driving one or more ground rods deep into the damp ground is one way, laying a ground screen or multiple ground radials is another. (3) Heavy-duty stacks. exothermically weld the thompson #28r "downlead" to the counterpoise ground rod. Counterpoise (1997-2011) is an alternative review journal formerly based in Gainesville, Florida (United States). Actually it is good to think of the counterpoise as one plate of a large capacitor, the earth being the other plate. PDF | The interaction of rocket-triggered lightning with an airport runway lighting system has been studied. CiteSeerX - Document Details (Isaac Councill, Lee Giles, Pradeep Teregowda): Abstract—A test airport runway lighting system, including a buried cable protected by a counterpoise and vertical ground rods, was subjected to direct lightning strikes, and currents and voltages measured in different parts of the system were reported earlier by Bejleri et al. with Counterpoise i) SAN-EARTH Covered Electrode ii) Parallel Electrodes iii) L-Shaped Electrodes iv) Cross Shaped Electrodes and Perimeter Electrodes v) Comparison of Grounding Resistance values of Various Shaped Electrodes 3) Submerged Grounding Electrode Covered with SAN-EARTH Conductive Concrete a) Third Class (Under 100 Ohm) Installation. The Blackburn 1/2 in. Chisholm@ieee. The Copper ground rod is tough and will last for years of superior service. It's all granite. To correct this problem, the radial system must be R. When grounding systems as shown fail to achieve the desired measured resistance to ground, additional ground rods may be required. Some hams think that grounding the radio/tuner to the AC ground lug is the same as using that ground as a counterpoise. In many cases, the best reading can be obtained by clamping the 3710/3730 onto the ground rod itself, below the point when the ground conductors are attached to the rod, so that you are measuring the ground circuit. The final parts to make are the feed and counterpoise. as a counterpoise, and the antenna is ground mounted. Ground electrode assembly #2. The use of solid copper flat stock that is. 8e(3) is updated to clarify use of a 5-step CCR with high intensity LED lighting. This makes another sort of odd order harmonic radiator!. 62 meters of the counterpoise, to be bonded to the counterpoise,. the ground wires shall be connected to fence fabric and ground rods can not be driven due to impervious earth materials. In modern power systems, there are two ground wires on transmission tower instead of single for better protection. When we look at how the word has been commonly used, we see general use and dictionary definition agrees. Triangular counterpoise grounding arrangement. During a ground fault zero-sequence current flows into the system at the source and returns to the earth at the point where the system has faulted to ground. Ideally the ground rod would also be connected to the main. The same approaches can also be used fdr long ground electrodes. Lightning surges had often bypassed the electrode, destroying equipment inside the transmitter building. Ground rods do very little good for RF! As a matter of fact adding ground rods can decrease RF efficiency when an insulated counterpoise is used. The GPK-01 is a Premium Ground Plane Kit for an easy solution to provide ground mount for a base or field mounted antenna. Ground Rod Stacking Threaded couplers (shown in Figure 2) are ground rod splices. Make connections without exposing rod or damaging rod coating. do not bond #6 duct bank counterpoise to can exothermic weld 3/4" x 10' copper clad steel ground rod, 20" min below grade bond cans together with #6 bare copper ground using exothermic welds notes: 1. 160M Folded Counterpoise After I had established my antennas for many of the HF bands; dipole for 80-40M and Hex beam for 20-10M, I turned my attention to 160 meters. 6 Shallow earth electrode Earth electrode consisting of a continuous counterpoise, radial earth electrode or oth-erwise to the surface parallel located earth conductors down to a depth of about 1 m. Amateur Radio Station Grounding RCC Mar 2007 - Lane Giard, N7ZXP This article comes from Don Young, N7DY, which was in The Wenatchee Radio Club News letter. Counterpoise Wire The resistance of the tower footing or structure grounding is dependent on local soil conditions and may vary widely over the length of a transmission line. I guess you just need to do the best you can, making the counterpoises as close to 1/4 wl as possible. One ground rod is in the front yard at the end of a half wavelength wire. The antenna will produce the appropriate voltage difference at the input side, and the receiver will see that voltage difference uncontaminated by external fields, according to the properties given above. Ideally the ground rod would also be connected to the main. Counterpoise -a counterpoise is a network of SUSPENDED wires or cables (or a metal screen), used as a SUBSTITUTE for an earth (ground) connection in a radio antenna system. Inverted L 80/6 meter band HF Antenna SWL Dipole Marconi Ni4L Dipole Antenna. Ground rings around structures are useful. We also don't see ground wires larger than #6 on services under 750 volts either. 25 lb / 100 g Height rod range 24 inch - 84 inch / 60 cm - 210 cm Minimum value of height per division 0. 1, cur-rents along the cable and the counterpoise and in the ground rods were measured (a total of 11 current. (a) Chemical and ground rods only. Not shown are the metal antenna rods, counterpoise earth spike, cords aerial (throwing lines) and two batteries. Conductive concrete electrodes are most commonly installed in a horizon-tal configuration; however, they can also be installed vertically. Two or three can be used in parallel. The antenna can be ground mounted directly at earth ground level similar to a ground mounted vertical using earth ground as the counterpoise. As I mentioned, I've been using the EFHW-8010 for about 6 months, and I couldn't be happier with its performance across all bands in all modes. ground rod 013336 013398 Dk Blue 013403 500 kcmil wire to 5/8-in ground rod 013397 013400 Brown 013441 250 kcmil wire to 3/4-in ground rod 013336 013399 Yellow 013442 500 kcmil wire to 3/4-in ground rod : 013397 013440 Lt Brown 013558 4/0 stranded wire all way, horizontal Tee connection. Buy an Icom AH-4 end fed tuner (auto coupler), attach your wire antenna wire to the hot end and run a short wire from ground side to a ground rod or counterpoise wire and enjoy. The counterpoise is connected to the equipment-grounding conductor by both being terminated on the metal base cans. Content provided by: FlexRadio Systems Engineering Grounding as it relates to the construction of an amatuer radio station has become a highly debated issue. If you ive on the Second or Third story of a apartment building and can't really install a ground? Not a problem, while not as effective as a "True Ground" a "Counterpoise" can be used to help compensate for the lack of a ground rod. Grounding electrical system shall comply with NEC 250. The AH-4 makes everything equal. The MFJ-931 Artificial RF Ground covers 1. I've researched this multiple ways; here on the forum as well as google. Provide a continuous counterpoise of number 4 (minimum) AWG bare, stranded copper wire over the entire length of all primary circuits supplying airfield lighting: outside pavements, with a minimum 2. ground rod is made using exothermic welds. 30(A) or 250. I've been told that I should ground my equipment. I was told by the manufactures that it needs a good ground to work. ing electrode and the grounding electrode at the service main shows that some current will flow through the earth but the earth is not part of the effective ground-fault current path. See Counterpoise Weight Installation Graduation 0. o Consensus reached. Lightning. Jim, you don't need that counter poise wire, the secret is a good earth. Jetgol imle buenwa. Basically a counterpoise is a springboard for your radio transmission to “bounce off” of into the atmosphere. I might be getting an AT2K tuner for my set up and this antenna but I don't really want to put an earth rod in where my shack room is. All counterpoise conductors on power and communications ducts which enter the building. Use a solid copper wire and use the ground clamp to connect it to the house service ground. better still, run as many as you can, spaced half the length of the ground rod apart. A good ground/radial system is essential to good efficient performace, especially on the low bands. This may require a rod of 6 to 8 feet in length. Not sure how I could do a counterpoise for it, if the box is up 20-30' and its dangling over a RV pad, lots of concrete, and ways away from a ground rod or anywhere I couldveven place one. Counterpoise • Broadband, high input impedance preamplifier. Grounding (Counterpoise) Good grounding or counterpoise techniques are absolutely necessary for maximum single sideband range. Index Terms—Airport runway, counterpoise, ground rods, lighting system, lightning protection, triggered lightning. 5MHz to 51MHz). Check the SWR without the counterpoise wire to see if it is needed. the ground wires shall be connected to fence fabric and ground rods can not be driven due to impervious earth materials. A notch up in performance is to cut the wire radials to the frequency bands of operation. Get yourself two or three earthing rods from one of the hardware/electrical shops. Thanks for the heads up tho!. Ensure the steelyard rod is properly connected and aligned as previously described. Some hams think that grounding the radio/tuner to the AC ground lug is the same as using that ground as a counterpoise. The end-user would use a test instrument and probes to first inject a current into the earth between a test electrode and a remote probe, measure the voltage drop caused by the soil to a designated point, and then use. For now, I am taking a cue from the Beverage community, and calling this a Loop on Ground, or "LoG" antenna. With fairly low power and good luck, one way to mitigate noticeable problems is a ground plane at room. Counterpoise: As a minimum, the counterpoise conductor shall be connected to each of the following system components utilizing appropriate exothermic welds: Each down conductor or steel column ground. Counterpoise -a counterpoise is a network of SUSPENDED wires or cables (or a metal screen), used as a SUBSTITUTE for an earth (ground) connection in a radio antenna system. Heavy Duty Access Wells are Traffic Rated, for use in road or parking lot areas. If you are using the fence post setup I would def. I use 100 feet of RG-213/U and a copper ground rod. Each path will have its own value of resistance, r. Ground rods have two main purposes: lightning protection – which is self-explanatory; and RF counterpoise – which involves “coupling” antennae into effective ground planes. A ground plane with two or more equal elements heading out from the antenna in different directions will cancel radiation and will be more of what we think of as a counterpoise or ground plane. ‘no counterpoise’ antenna gave a lower measured field strength than the reference antenna which was a 10m long vertical wire, fed against 10 random length buried radials and matched with the same auto-tuner that was used for the ‘no counterpoise’ antenna. I've heard that a few elevated radials is a better, or at least as good an option as many ground radials, and that seems to be the easier option too, and so I'm leaning toward that option. Each ground rod should have a cylindrical shape, sharp angles providing area of potential arcs. 5 but including resistor R 3 and inductance L 3 that account for imperfect ground connection of the elevated counterpoise and propagation. A good ground/radial system is essential to good efficient performace, especially on the low bands. These phenomena can cause current to flow in the neutral conductor and into the ground rod at each of the neutral-to-ground bonding points, which creates a proportional NEV. 4/0 AWG for counterpoise and for welding to building steel. Counterpoise: As a minimum, the counterpoise conductor shall be connected to each of the following system components utilizing appropriate exothermic welds: Each down conductor or steel column ground. Connect ground wire between the grounding screw on the enclosure using a UL 467 ground lug, or equivalent, and the grounding rod. We have proven that we can work in the most challenging environments as a prime contractor or support a team effort in the construction of a new runway as a key subcontractor. circular counterpoise conductor with six equally spaced, 6-meter-long vertical grounding rods. Index Terms—Airport runway, counterpoise, ground rods, lighting system, lightning protection, triggered lightning. So, sure, attach your radial to the ground rod it will significantly improve your station effectiveness. 35(B), as covered above. He has since shortened his "grasswire" to 85-feet (25. Ground Rods 76. mechanically connect connections above grade. exothermically bond grounding jumpers to counterpoise. If your soil is rocky or sandy, drive your ground rods, pull them back out and dump the rock salt into the holes where the ground rods go. There are many different opinions on the subject and this articles will not try to weigh the merits of these points of view, but will discuss its necessity as it relates to best practices for setting up a software defined radio. Use it to help bleed off static and RFI and prevent RF hot spots. Cable or counterpoise wire installed in trench, duct bank or conduit shall be measured by the number of linear feet (meters) of cable or counterpoise wire installed in trenches, duct bank or conduit, including ground rods and grounding connectors, and trench marking tape ready for operation, and accepted as satisfactory. terminate counterpoise at ground rod tie counterpoise to existing ground rod terminate counterpoise at ground rod 5' (typ) 1 1 1 1 1 1 1 1 5' (typ) matchline to sheet 31 matchline to sheet 33 150' lt 300' lt 450' lt 150' lt 300' lt 450' lt circuit schedule symcircuit & cable description sizenotes a rw 4-22 north #8 1 b rw 4-22 south #8 1 c rw 4. Chameleon Spike Mount with Hybrid Micro and Counterpoise. counterpoise grounds shall be used at locations where ground alternate driven line post anchorage is optional. There have been many manufactures over the years that built half wave vertical antennas that had only a few short radials. At the manhole structure, the counterpoise and manhole (including all metallic parts and ground bus) is bonded to three ground rods installed around the perimeter of the structure. I am planning to use my KX3 and KXPA100 powered by Budipole PowerMini and LiFEPO4 battery for field day this year and have a question about grounding. And likely would end up with a resonant RF ground somehow given the even the shortest length I could make it. the ground wires shall be connected to fence fabric and ground rods can not be driven due to impervious earth materials. conﬁguration appears as a matrix of parallel (grounding) and series (skywire) impedances in series with the Arc Ω creates an average ZFAULT value. No other counterpoise or radials. counterpoise ground rod not to scale notes: 1- type and minimum number of ground rods shall be as specified on the plan. The grounding is the component of the Lightning protection system that dissipates the lightning strike into the surrounding earth. ufgs-34 73 13 (april 2006) unified facilities guide specifications references are in agreement with umrl dated july 2019 ***** section table of contents division 34 - transportation section 34 73 13 mooring and grounding points for aircraft 04/08 part 1 general 1. 4/0 AWG for counterpoise and for welding to building steel. It is used with radio transmitters or receivers when a normal earth ground cannot be used because of high soil resistance or other reasons. counterpoise will be required apart from the coaxial-feeder cable. This site is best viewed at 1024 x 768. The Copper ground rod is tough and will last for years of superior service. 1 references 1. Use a HIGH power resistor as the losses in R V are 2645W at 20Ohm or 53W at 1000Ohm. The term 'counterpoise' has been used and abused and since it describes nothing in particular it is an unhelpful word. That’s what I’m thinking…. Ground both ends of each steel through girder with a driven ground rod as shown on the Contract Drawings. The same approaches can also be used fdr long ground electrodes. It is referred to as the dead earth method because the reference ground is only being used for the test and is not normally part of an electrical system. Using a traditional ground rod clamp to squeeze the wire against the ground rod provides all you need to conduct lightning energies although opinions vary. A 3/16 hole is required thru the ground rod for direct mounting of the coil ground side and support. On the other hand, at extremely low heights, Q is low and length is non-critical. The conductor can consist of rod, wire, sheet-metal or equivalent. The counterpoise is connected to three vertical ground rods, as shown in Fig. The Copper ground rod is tough and will last for years of superior service. AC 150/5340-30H 7/21/2014. It is attached from support to support above the transmission line and well grounded at regular interval. areas, locates the counterpoise at a mid-point distance between the pavement edge and the line of light units. The extremely dry soil conditions would have required hundreds of feet of copper rods to be inserted into the ground in order to create a low enough impedance ground to protect the buildings from lightning strikes. In modern power systems, there are two ground wires on transmission tower instead of single for better protection. Ground electrode assembly #2. All counterpoise conductors on power and communications ducts which enter the building. 76 inch x 10. Grounding the gutter might help safety-wise but the downlead to the “ground” will have inductance and this will keep some level of voltage on the gutter ends anyway. Two questions: a. We also don't see ground wires larger than #6 on services under 750 volts either. 83 inch / 375 mm x 275 mm. ground rods as approved by the Engineer. Ashwani Kumar, Member, IEEE, and Hans R. A counterpoise can be considered to be an artificial ground. Instructions for Putting up a Long-Wire Antenna. A good counterpoise does do the job in draining static crackling in your receiving signals. The Prototype I have recently started to experiment with such an antenna, a corner-fed square loop, 15' per side, mounted at ground level, and constructed with insulated wire. Simultaneously perform a bonding test of the grounding conductor (necessary to complete the return path). Jetgol imle buenwa. If the > latter is the solution, is the 1/4 wave length for the radials measured > from the ground rod or from the tuner ground lug?. All still tons of noise. If you have conductive soil, you might just put a grounding rod next to each piece of equipment. The first "ground rod" of my grounding system is within 4 feet 2 inches or 1. Airport Lighting Installation Airfield Lighting. Define counterpoise. Portable Counterpoise: No guess work or ground rods needed, just connect four insulated 12’ radial wires to the tuning unit and lay them on ground. An array of 20 #18 copper wires, 25-30 feet long - attached to the ground rod, will provide an excellent counter poise. 2-3 Foundations For DVOR Counterpoise And Shelter (for Information Only) 45. Similar counterpoises protected cross-country cabling. Below ground earthing conductors, counterpoise, and grounding grids Surge protective devices for electrical panels and electronics In order for a lightning protection system to safely and quickly dissipate direct and indirect lightning currents and voltages, the integrity of all elements of the lightning protection system must be verified. Another very important consideration is the customer service from Danny - E73M. Counterpoise - 2019 All You Need to Know BEFORE You Go (with Photos) Print Media - Yelp. bury a grounding rod or copper pipe horizontally 1 or 2ft under ground and connect it with a heavy copper braid or ground wire. 5 watts on key-down. Some hams think that the counterpoise that is "in the ground" is also an RF Ground. conﬁguration appears as a matrix of parallel (grounding) and series (skywire) impedances in series with the Arc Ω creates an average ZFAULT value. 27 meters of my station equipment. End-Fed Longwire Antenna with a 9:1 UnUn rated at 700 watts, covering 160 meters through 10 meters, only 124' 6" long. Grounding is accomplished by connecting a heavy cable from the ground side of the antenna to a ground rod. Vertical Antennas Projects is a curation of 183 resources about , 7 Bands Semi Vertical Antenna, Ground System on a 160M vertical, The Hudson antenna, HF Vertical antenna on a magnetic mount, Groundplane antenna. Can I just run a counterpoise from the tuner GND ? Wouldn't this be better than an earth rod ? Thanks. When I am using them both at the home station they are grounded to each other and every other piece of equipment in the shack using a ground bar and copper straps. Connect ground wire between the grounding screw on the enclosure using a UL 467 ground lug, or equivalent, and the grounding rod. These are made. Products/Services for Counterpoise Grounding Systems Grounding Bars and Rods - (84 companies) Grounding bars and grounding rods are electrical connections that divert undesirable current in order to protect humans and equipment. I think that using it as a “counterpoise” that close to your wire probably won’t do anything useful for you. This grounding connection is in addition to the grounding and bonding required by either 250. • Sleek and low-profile -- Low wind surface area, small area required for mounting, mounts easily on decks, roofs and. If used as a vertical antenna then it doesn't need an extensive set of earth radials to be efficient. All you need to do now it load up your wire and go. Cable tray support. Get info of suppliers, manufacturers, exporters, traders of Earthing Set for buying in India. • Automatic bandswitching -- Single coax cable feed, each band is individually tunable, wide VSWR bandwidth. In poor soil conductivity or in frozen soil, it may function as a good counterpoise, yet have a high resistance to ground. If the conductor of counterpoise wire is very long, although the power frequency grounding resistance of the tower grounding device is decreased, the lightning protection performance of the transmission line is still not good. The Code deﬁ nes “grounding” as the connecting to ground or to a conductive body that extends the ground connection — and the Code deﬁ nes “ground” as the earth. In No Ground Plane systems, the coax shield is used for counterpoise (substitute for the ground connection). It's paramount for safety and station efficiency to have an excellent grounding system. It needs a good RF ground, and a ground rod or water pipe does NOT meet that criteria. Being inside a small tent with a puny ground rod and coax inviting the strike from the lightning rod antennas outside to come visit, is NOT a. 2-3 Foundations For DVOR Counterpoise And Shelter (for Information Only) 45. Ideally the ground rod would also be connected to the main. 04 SERVICE EQUIPMENT A. Typical rod resistances will be less than 25 Ω in most soils because of the existence of proximate utility ground references Low ground resistance (< 10 Ω ) can be achieved with: Multiple Rods bonded together Counterpoise system Coupled rods Grounding is thought by many to be synonymous with electrical safety. minimum 8" bend radius. the lower connection 4. That’s what I’m thinking…. Stacking ground rods increases the. So I have to look for another. The term 'counterpoise' has been used and abused and since it describes nothing in particular it is an unhelpful word. The RF ground should if possible contain radials or counterpoise wires and not just ground rods. connected to ul467 ground lug. Similar counterpoises protected cross-country cabling. or more of metal water pipe is in contact with the earth. Since ground rods and mats have been found to be ineffective in high-resistivity soils, some utilities have implemented counterpoise grounding. The guy who installed my HughesNet dish for my internet showed me a neat trick. Run insulated ground conductor in conduit with all feeder and branch circuits. By 1974 and the 13th edition of The ARRL Antenna Book, the extended account of the counterpoise system has disappeared from the discussion of 160-meter antennas. Walking outside barefoot is a simple and relaxing way to get started. Make sure the station is at least at dc ground potential (ground all the equipment chassis to a common point and then to a good dc ground) and keep the lightning ground outside the house. The antenna is attached through a 1/4" hole in the product, or by threading it into a PEM-style insert. Use 2 or more parallel ground rods if a single ground rod electrode resistance to ground exceeds 25 ohms. The earth is not permitted as an effective ground-fault current path. Ground Characteristics, Lightning Protection Grounds, Radio Frequency Grounds, and Practical Grounding Systems Earth characteristics, grounding material characteristics, benefits and practical issues related to grounding systems. example effective counterpoise length, where to locate grounding rods, where to connect down conductors in a mesh and the potential difference between points on the same grounding electrodes. Reading, and Grounding Network Impedance vs Frequency Plot. Figure 2 shows a grounding diagram of a typical ham station. center of the rod element, which is to be 120 cm above the floor of the shielded room. The auxiliary grounding electrode must be connected to the equipment grounding conductor in addition to the frame of the generator. Use copper conductor not less than No. It is referred to as the dead earth method because the reference ground is only being used for the test and is not normally part of an electrical system. typical counterpoise arrangement consisting of N rods with N horizontal buried cables leading to the rods will present a transient or surge impedance which may exceed, by an order of magnitdde at least, the dc ground resistance of the arrange. This paper discusses language in NFPA 70: National Electrical Code (NEC) as it pertains to low-resistance grounding for lightning protection systems, covering such areas as the following: "The radio tower specs call for grounding of 10 ohms and the footprint is all sand. Corrosion, glazing, etc. Workable: Attach the counterpoise stud to a good ground rod at or near the feed point of the antenna. Ground Access or Inspection Wells are used to gain easy access for inspecting Grounding Systems. In No Ground Plane systems, the coax shield is used for counterpoise (substitute for the ground connection). What do we do?" —Contractor "The job is on a mountaintop. NOTE: Depending on the design of the counterpoise lightning system, connecting the FLA directly to a dedicated ground rod may provide more effective protection of the circuit. The best I have found for convenience is a Hustler Resonator set. More wires will give you better efficiency and longer length isn't necessary. underground bare conductor (counterpoise) to direct lightning strikes. I suggest you to tighten all radials in the same quadrant, each 10° apart to prevent coupling, in order to get a common directivity on all bands. 8 is updated for independent control of elevated and in-pavement runway guard lights. Ground rings around structures are useful. Deep ground rods Each rod wasEach rod was driven deep. If you're using a wire antenna and you're plagued with a poor RF counterpoise, try using the "artificial ground" device. These are for the RF ground described above. This is referred to as the single point ground. Guanella Balun: Lab rated with up to 30 dB common-mode suppression, the balun prevents feedline, radio, and you from becoming part of the antenna!. with the surrounding soil layers. Information Bulletin – Ground rod connector stock no longer held as a separate item at AE Concrete Ltd. I wanted to ask this in it's own specific thread to hopefully get opinions and thoughts. Below ground earthing conductors, counterpoise, and grounding grids Surge protective devices for electrical panels and electronics In order for a lightning protection system to safely and quickly dissipate direct and indirect lightning currents and voltages, the integrity of all elements of the lightning protection system must be verified. Counterpoise Earthing. 3 as-built drawings part 2 products 2. Abstract: Practical test methods and techniques are presented for measuring the electrical characteristics of grounding systems. R56 requires all ground rods to be UL listed. conﬁguration appears as a matrix of parallel (grounding) and series (skywire) impedances in series with the Arc Ω creates an average ZFAULT value. In general, the higher the wire is above ground, the greater the accuracy of predictions. with Counterpoise i) SAN-EARTH Covered Electrode ii) Parallel Electrodes iii) L-Shaped Electrodes iv) Cross Shaped Electrodes and Perimeter Electrodes v) Comparison of Grounding Resistance values of Various Shaped Electrodes 3) Submerged Grounding Electrode Covered with SAN-EARTH Conductive Concrete a) Third Class (Under 100 Ohm) Installation. ads some ground rods to the setup and tie them all together and take one run to where the mast mounts and leave it with a proper crimped on lug and some no-ox. It may also be used. This site is best viewed at 1024 x 768. Ground rings around structures are useful. 62 meters of the counterpoise, to be bounded. bond to fuel tank ground plate 1 2 3 legend buried counterpoise #4/0 copper 24" deep 3/4" x 60'-0" copper clad steel ground rod with access cover cp 4 2 4 1 5 5 general note coordinate location of counterpoise and ground rods. Carefully position the PL259 connector in the washer ready for soldering. When using antennas worked against ground, we can used radial wires buried shallowly ( ground rods or stakes are fairly useless for this RF purpose). For the lattice structure case the CDEGS HIFREQ and NEC-4 models did not agree on the relative ranking of loop electrodes, four radial counterpoise and continuous counterpoise, and this. column of the staking sheet to add a “Counterpoise”. A pointed end makes it easy to push. We also don't see ground wires larger than #6 on services under 750 volts either. Bond all metal pipes such as water, gas, fire, storm, sewer, etc. Grounding can reduce inflammation in the body which may reduce aches and pains associated with the joint deterioration that occurs in osteoarthritis. A good ground/radial system is essential to good efficient performace, especially on the low bands. 04 SERVICE EQUIPMENT A. • Automatic bandswitching -- Single coax cable feed, each band is individually tunable, wide VSWR bandwidth. General Industry Information. After years of extensive testing, here how we address the grounding and counterpoise system for your vessel. The stock antenna is a horrible radiator, and it lacks a counterpoise or a ground plane to keep the RF from coupling to your body. , which enter the structure to the nearest down-lead, ground rod or counterpoise. 3 When rock is encountered, other systems for providing additional grounding are radial counterpoise and continuous counterpoise terminated by a ground rod. The standard non-directional AM antenna is a vertical design with a radiator above ground, and ground system below the surface of the site. I now exclusively install the KISS system on fibreglass or wood vessels. This spreads the electric current along several paths as well as providing redundancies. Steel rebar normally provides less resistance than driven ground rods (less than 1 ohm) if implemented correctly. I can run a ground line to a stake (copper clad) driven into the ground. For Broadcast work, you want to minimize ground losses, and have a good pattern in your coverage area, which the vertical dipole brings without investment in radial systems and ground screens. NOTE: Use threaded couplers made of the same material as your grounding rods. 3 as-built drawings part 2 products 2. The ground rods are all bonded, together and to the service ground rod, with single ott stranded, with the proper lugs. A lighting protection system (LPS) requires a network of electrically conductive paths to safely transmit a lightning strike’s 300 million volts from rooftop air terminals—colloquially called lightning rods—to ground electrodes. Abstract: Practical test methods and techniques are presented for measuring the electrical characteristics of grounding systems. used as a substitute for the ground connection. A common problem with backpacker or balcony antennas is finding a good counterpoise. I use an electrical ground block used in electrical service boxes. with the surrounding soil layers. And of course, the ground ring around the tower must be bonded back to wherever the equipment is located. 3 When rock is encountered, other systems for providing additional grounding are radial counterpoise and continuous counterpoise terminated by a ground rod. The following tables show the recommended lengths to use for antenna wire based on the bands you wish to cover. If the > latter is the solution, is the 1/4 wave length for the radials measured > from the ground rod or from the tuner ground lug?. I have a set of resonators for 15m, 20m & 40m that can either be run separately on the base whip or run altogether (similar to a Spider Antenna – only MUCH cheaper) with a $6. a hole in the ground dug by an animal such as a rabbit, especially to live in. We have shown that the electrons after reaching the earth/ground through the grounding rods are actually transported to the source through orientations of water molecules. Portable Counterpoise: No guess work or ground rods needed, just connect four insulated 12' radial wires to the tuning unit and lay them on ground. rod by stainless steel bolts and washers. Inspection and documentation at each grounded location, weld, depth of counterpoise, etc. Diagram of counterpoise under the antenna mast of an AM radio station. Buried insulated counterpoise (12 off 3-4m long) + 9m wire laid on Fibreglass fishing rod use 160 m Top Band Inverted “L” Antenna - G8ODE. Counterpoise shall be installed in a separate. Harger has a fully developed grounding and bonding product line with grounding busbars, conductors, mechanical grounding components, and grounding electrodes. I am planning to use my KX3 and KXPA100 powered by Budipole PowerMini and LiFEPO4 battery for field day this year and have a question about grounding. 1 Air Terminals. A notch up in performance is to cut the wire radials to the frequency bands of operation. Use it to help bleed off static and RFI and prevent RF hot spots. 4m or 8 ft long, copper clad. Static Grounding for airports and runways; Tank field and railing grounding; Radio and T. By adding so many ground rods, Patrick has completely stabilized that parameter, and can now use a fixed resistor. It is still a good idea to attempt a low ohmic connection as good engineering practice, but arcing will make your connection for you with small voltage potentials using a ground rod clamp. 1 Interconnect ground rods with grounding electrode conductor below grade and as otherwise indicated. A rod sticking out in the middle of my garden is far from ideal. It is a flat bar mirror mount with a ground plane antenna mounted underneath. This gives you a strong sturdy support as well as good grounding for your antenna. I was told by the manufactures that it needs a good ground to work. The counterpoise is connected to three vertical ground rods, as shown in Fig. 1 This document shall cover traditional lightning protection system installation requirements for the following: (1) Ordinary structures />(2) Miscellaneous structures and special occupancies. The best way to address long-term functionality of the grounding electrode - ground reference system is to look at the construction of the ground rod and consider the design elements that lead to the longest installed life to ensure a low-resistance ground reference. Half of your antenna is your radio frequency (RF) ground. The higher bands usually don't suffer all that much, but 160M and likely a few other of the low bands need a real counterpoise to avoid burning up your power in the ground or house wiring or whatever happens to be the counterpoise now. 04 SERVICE EQUIPMENT A. 4/0 AWG for counterpoise and for welding to building steel. The counterpoise wire may be further earthed by installation of ground rods at intervals of at least 150m. NOTE: Use threaded couplers made of the same material as your grounding rods. (c) Ground rod and counterpoise only. exothermically weld the thompson #28r "downlead" to the counterpoise ground rod. efficient counterpoise. 25 lb / 100 g Height rod range 24 inch - 84 inch / 60 cm - 210 cm Minimum value of height per division 0. From left to right/back to front; BG-172, CW-140, BG-175 and BG-174. Use a HIGH power resistor as the losses in R V are 2645W at 20Ohm or 53W at 1000Ohm. Jim, you don't need that counter poise wire, the secret is a good earth. A “Ufer” ground is slang for what the National Electrical Code (NEC) addresses as a concrete-encased grounding electrode. For the lattice structure case the CDEGS HIFREQ and NEC-4 models did not agree on the relative ranking of loop electrodes, four radial counterpoise and continuous counterpoise, and this. Here we connect the galvanized wire with the leg of the tower with the help of galvanized lug and the galvanized lug is fitted with a tower leg with the help of 16 mm dia nut and bolts.