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My shack is on a second story, really far away from the house ground. but was cost and time prohibitive for me. I cannot reach the house ground. For further reading, I suggest W8JI's article on station grounding. In addition was much easier to make bends. If you can't do that, then sometimes a 1/4 wave counterpoise along the why do these two Meijer G functions not cancel each other? other equipment. Also check your power plugs’ pins’ polarity (yes, there is a difference unless you want to blow your power strip’s fusing system). There is just as much RF energy in the shack as before but we have forced it into the magnetic field (current) on the transmitter chassis rather than existing in the electric field (voltage). Add a second # 4 or # 6 AWG wire / cable with a Green insulation at the required length to the building’s 240V AC electrical primary power panel ground terminal to … voltage around, reducing intensity of localized electric and magnetic fields. cable come down The ground system used was a simple one that would make a good system for a new HAM’s first station. Note that this is the RF resistance, not the DC resistance. rev 2021.1.15.38327, The best answers are voted up and rise to the top, Amateur Radio Stack Exchange works best with JavaScript enabled, Start here for a quick overview of the site, Detailed answers to any questions you might have, Discuss the workings and policies of this site, Learn more about Stack Overflow the company, Learn more about hiring developers or posting ads with us. effectiveness except First and foremost, grounding is for the safety of your family, home, and ham equipment. 67. Remember this, because it is important! possible. Shielded ground leads in actual fact cannot work, shielded grounds are a myth or misconception. My shack is on a second story, really far away from the house ground. grounds. The misconception about grounding is widespread. I the copper wall panel extends under the panel edge and is bolted to the breaker MFJ 931 HF Artificial Ground Units make resonant a random length of wire thrown along the floor and produce a tuned counterpoise. What wire should I use? I am installing a ham radio and want to properly ground it. The outside ground is only for AC mains safety. Get it as soon as Mon, ... trade it in, give it a second life : This page explains how to use the MFJ-931 ground tuner to help ground a shack that is more than a couple of meters from a ground point. By H. Ward Silver Providing good grounding — for both AC and DC power as well as for the radio signals — is very important for a trouble-free ham radio shack. In effect, it's part of the antenna, and usually that's not what you expect. But since that 1/4WL of counterpoise wire radiates like an antenna, it is better to avoid having to install it - better to have a balanced antenna system. room level can be used. feed lines and radios to deal with. group them by function, such as receive cables and control cables, high power RF This is an article about Ham Radio grounding that I wrote some time ago when I added a second ground and entry point for my shack for some additional antennas. Do I tie all my equipment to one point and bring this ground wire to the outside? Electrical safety is a separate issue from radio frequency problems. What did Amram and Yocheved do to merit raising leaders of Moshe, Aharon, and Miriam? to the grounding system are much too long to provide a "low-impedance" Ground strap. Why is it so hard to build crewed rockets/spacecraft able to reach escape velocity? This ground system The single heavy ground wire was quite long and extended diagonally to reach the ground rod that was 30 feet down to the far outside corner of the ground floor. His grounding system looked like the setup shown Fig. That wave energy in the shack remains uncancelled and simply moves into the magnetic field rather than in the electric field on the transmitter chassis. As a quarter wave length, the wave enters the wire, bounces off the end, and when the wave reaches back to the start, it is exactly 180 degrees out of phase to the wave then entering the wire. Anywhere there's common-mode current on your feedline, it's radiating. If it works, use it, Grounding a second-story shack with an outdoor antenna, read more about it in a separate question, baluns on your antennas if they need them, i.postimg.cc/28G93880/120-ft-End-Fed-Antenna-System-3-9-MHz.gif. I drop the feedline through the wall on the second floor straight down vertically to the ground to the vertical. This post is so true that it is an art, mixed with a little magic that can only be discovered by experimentation. in the operating room. This item: Storm Power Ham Radio .125" x 2" x 6" Copper Ground Bar Kit- SCGB-HAM-6KT $39.98 In Stock. 4.7 out of 5 stars 51. Stack Exchange Network. Grounding a second-story shack with an outdoor antenna - Amateur Radio Stack Exchange. ground below the floor. Even the metal flashing that is part of a drip edge for the siding, seen just The orange and yellow wires are the power line feeds to the radio room. The single heavy ground wire was quite long and extended diagonally to reach the ground rod that was 30 feet down to the far outside corner of the ground floor. The antenna is at least 100 feet away as. towers or antenna the equipment I run a Yaesu FTM-3100R radio with 2M Diamond Antenna mounted to a metal tire carrier on the back of my Jeep Wrangler. The Also, you can use an "artificial ground". It also Can I colorize hair particles based on the Emitters Shading? Grounding a radio in a 2nd floor apartment. Internationalization - how to handle situation where landing url implies different language than previously chosen settings. the ground floor entrance common point: All cables are parallel. for lightning and RFI safety. leads as power returns for things like antenna switches and controls, I want Sold by Moon Slew Market and ships from Amazon Fulfillment. I have no grounds running down my 3rd floor condo, but I do have solid point-to-point grounding systems for two consoles of radio and computer gear. patched in for breaker panel, and is more a matter of wire resistance at near dc frequencies. I believe this "misperception" refers to the idea that you should always run a heavy-gauge copper wire down to a ground rod. Bonding at this point is primarily for lightning protection. Free shipping and free returns on Prime eligible items. With a properly current-balanced antenna, you won't have any significant common-mode currents due to your transmissions, so you won't have any problems with RF in the shack. The two waves cancel. This ham had his shack installed on the second floor of the house. Be sure to read the RFI grounding page. Better to have a balanced antenna system. Lightning is mitigated at the entrance, If you wind up on the second floor like me, then be sure to get an MFJ-931 to make sure any current is send to the counterpoise. But that 1/4WL of wire will radiate just like 1/4WL of a 1/2WL dipole antenna (and may be physically too close to the operator). I had a second floor shack in the 70's...My station ground was made of #8 stranded, insulated copper wire that ran 10 ft over to the wall and about 10 ft down the outside wall to a single ground rod.....I never ran more than 300 watts..My antennas were a couple monoband beams on a tv tower about 60 ft away and an inverted vee about 20 ft from the outside of the building...I never … so from the upstairs contesting room. Leave it to you, @Phil. not by these leads to the contesting room "counterpoise". ground level cable entrance panel. The other reason is to give common-mode currents some place to go. It only takes a minute to sign up. exit to various But it's really better if you just have no common-mode currents in the first place. ground buss. Who enforces the insurrection rules in the 14th Amendment, section 3? That really only works if your ground wire is a very small percentage of your wavelength. cabinets. Here is how I handled RFI (and lightning) problems in my contesting grid of wires at House ground layouts. probably have or attempt to have an RF Grounding plan for new ham shack - good/bad idea? Even with 1500 watts and between wires are good. impossible, but first an important fact! 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. breaker panel to the left is 240 volts for seven 15-ampere amplifier outlet What's best? a six-element antenna pointed right back at the operating position, there are no "RF-in-the-shack" really means RF voltage in the shack which is what bites us when the chassis is "hot". The best RF ground has no small diameter bends in it, it's absolutely straight. The entire ceiling, which is the floor of the radio room, has braiding that on very low frequencies. I can ground the antenna at its base; can I run a ground from the shack to the outside to a rod? Still, we should The best way to create a good ground connection is to use a metal cold water pipe. What are some ways to ground a transmitter+antenna in an enclosed attic? This "closes the loop" made by long leads and as is the frame for the garage door. in voltage to match Do not depend on your house power wiring grounding pin/points as they are often loosely connected, corroded or simply not on the same common grounding points. antenna located close to the operating area. Whatever connection you make will be long enough that it will be more of an antenna than a ground. This will remove many of the RF problems that stations encounter! This sort of disagreement about ground … Amateur Radio Station grounding. One reason is lightning protection, but that's probably not what you hand in mind, and it's more complicated than running some wires to some dirt. Note: This posting does not address lightning protection or safety grounding. A good ground connection is every bit as important as a good antenna in do-it-yourself radio electronics. site design / logo © 2021 Stack Exchange Inc; user contributions licensed under cc by-sa. To run a ground from my equipment to the outside/ground is a run of at least 60-75 feet. You can't, anyway. All these types of installations may suffer grounding issues. Although proper power grounding is fairly straightforward for AC and DC power, grounding for the radio signals in a ham station is a different problem altogether. This strap is part of the "grid" of wires that establish a Shielded ground leads in actual fact cannot work. The conductive wide strips or The artificial ground absorbs RF. The far end will be about 45 feet above ground level. Electrical safety requires a properly working safety ground path back to the Sci-fi book in which people can photosynthesize with their hair, How is mate guaranteed - Bobby Fischer 134, Children's book - front cover displays blonde child playing flute in a field. If I want to minimize "RF in the shack" ... what some good ways to ground a transmitter and indoor antenna in a top floor room or attic with no exterior access? gutters allow quickly pulling of new cables and keep cables bundled or parallel This could be a major problem if your shack is on the second floor or higher. Your house wiring ground should never be considered an RF ground, even if it is all brand new and tightly connected. That’s a lot of noise: it was 18 dB above my antenna’s “noise floor”, and 26 dB above the receiver’s noise floor. To run a ground from my equipment to the outside/ground is a run of at least 60-75 feet. First and foremost is for the safety of your family, home, and HAM equipment. RF problems. chassis voltages. His grounding system looked like the setup shown Fig. Last night this measured about S5.5, which is about -93 dBm (preamp off, 6KHz bandwidth). the current and locations. I have a small handheld radio as … I will have a 20' mast with a long wire antenna running 130+ feet out to the south. How to enlarge a mask in Photoshop non-destructively ("bleeding", "outer glow")? A number of students requesting a number of reference letters. Resources listed under Grounding category belongs to Technical Reference main collection, and get reviewed and rated by amateur radio operators. transmitting antenna Strapping from the copper wall panel to the entrance panel is short, and I installed. By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy. A ground to "earth ground" is never required for RFI mitigation. This is at ground level. Moral: Avoid unbalanced antenna systems (OCFs and EFs) if one's shack is on the second story. This panel is the first line of defense for lighting in my contesting barn. ensures cables do not have much voltage differential from lightning. back to a wide barn: Entrance panel is bonded to the electrical entrance. Proper Station Grounding is Important! land and spread out antennas, I still have a tower close to my contest barn. You should read more about it in a separate question. First of all: 1) I don't have an RF ground (don't really want to drill thru the house and siding for the ground strap) and 2) my antenna is a semi-indoor/attic dipole (HOA). rods (or even buried radials) have He had no suggestions about what to do in my situation (I live on a second floor condo) outside of running a counterpoise wire from the ground terminal along the floor … You don't need that. station equipment Installing a ground plane at room level is the most practical way to minimize This ham had his shack installed on the second floor of the house. Bonding of Coax shield to RF ground conductor for long ground runs? good low resistance low frequency paths. A grid of foil does not need to be too dense. radio room. very limited Or if you have to run a long earth cable to a remote ground spike. above the horizontal 2X4, is bonded into the grounding grid at multiple points, Don't. Lightning safety primarily deals with how entrance cables are routed and Specifically which misconception about grounding is widespread? Sixteen or more trunk cables ; Lightning protection: keeps all equipment at the same voltage during transients from … Adding the choke to the antenna input made a big improvement in lowering the noise floor. By grounding the feedline somewhere, you short out these currents. I'm sure I'm not alone in situations where obtaining a short ground lead is Dig a small bowl into the dirt where the ground rod will go, Pour in water to fill the bowl, Push the ground rod into the ground a few inches, Remove the ground rod and let the water flow in, Push the ground rod into the ground a inch or two more, Repeat while ensuring an adequate pool of water is in the “bowl.”. special radio and antenna setups 3 below: Figure 3. Grounding a HF radio on 2nd floor by kyle » Wed Apr 07, 2010 4:09 pm From what I understand, the ground wire from radio equipment to the ground rod should be short or the ground wire may be a resonant length on HF bands and act like an antenna, which could cause an RF burn to the operator if the panel of the HF transceiver is touched. We call that empirical testing. All cables eventually going upstairs are bundled or parallel after they leave RFI is aggravated by poorly installed or designed antenna systems, Immediately below the desks, I have another common point. RE: Note: This posting does not address lightning protection or safety grounding. The Sutton Transceiver was showing strange mismatch symptoms when transmitting through a z-match but not when into a dummy load or resonant antenna, and the 6m Transverter and Linear project indicates there is some RF … I am copying my answer to another similar question. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. the entire room, including the operator, "rise" I'm running a coax from the second floor radio to the attic where i attach to a dipole (no balun) and … amplifier power distribution and receiving antennas. World's Largest Supplier of Amateur Radio, Ham Radio, and Communication Equipment. high gain 40-foot boom ten-meter antenna pointed right into the radio room, shielding. I will be including a lightning arrester that will also go the the ground. It doesn't seem to necessarily correspond to how far away the other vehicle is. Talking to a technician from Ham Radio Deluxe the other day, he mentioned that I really need to take steps to make sure that my radio is grounded. Even grounding to a cold-water pipe would make the building's plumbing become part of the complex antenna that has been created. Good luck, and experiment, as grounding is not an exact science no matter how many articles regurgitate the old wives tales about grounding everything to the outside grounding point - a 1830 ham byline too often quoted by newbies writing on these blogs. carpet, a screen, or something under the floor. Thanks for contributing an answer to Amateur Radio Stack Exchange! The wide very heavy heavy braiding going upwards is not for lightning. bonded to dwelling power mains grounds, and usually or often will require a Hello guys, I'm planning on purchasing a K3/100 but am concerned about my second floor shack and RF problems. What to do? This ground effectively places your rig near actual earth ground potential, even if your rig is on the second floor or higher with no earth ground possible. Lightening NOT ONLY KILLS radios but can start house fires! I run grounding straps to a common grounding node: a length of metal braided wire and a terminal block cheaply purchased from a hardware store. No significant change noted in noise floor. Amateur Radio Stack Exchange is a question and answer site for amateur radio enthusiasts. Lead lengths to the grounding system are much too long to provide a "low-impedance" RF ground. Each has it's own set of requirements, but not all station setups need every kind of ground. ground when using an antenna feed system with high common mode current, or when With 1500 watts, and especially with the — Most of the a-c-powered tx/rx equipment in use includes a connecting path from the circuit "common" (typically, via the chassis to the "ground" pin of its a-c mains cord). With that done, you will probably be in better shape than most stations that run a wire to a rod in the dirt without any thought. A good ground system is an essential part of a good ham station for various reasons. cables, AC power lines, and computer or telephone cables. Not exactly the most practical thing in the world, especially from the second floor, right? Wiring here is just being What does a faster storage device affect? or more correctly counterpoise can be strips of Electrical Safety 2. Does installing mysql-server include mysql-client as well? Note the very large ground straps that also form a "grid". RFI is NOT Of course, it works only at the frequency/wavelength that it is built for. this change should help in reducing losses though. How to make columns different colors in an ArrayPlot? … Build your ham radio station with effective grounding and bonding techniques: AC safety: protects against shock hazards from ac-powered equipment by providing a safe path for current when a fault in wiring or insulation occurs. So it absorbs any RF energy at the tuned frequency. baseboard will work. My application is a little bit atypical, because I have quite a few antenna forms a large counterpoise. Shop through a wide selection of Electrical grounding bars at Amazon.com. RF in the above-ground shack. Left silver outside tray= shielded control cables (48 pairs), Left tray= receiving and receive switching, Right tray= transmitting and TX antenna controls. 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. I occasionally get reports from other vehicles that they don't hear everything I'm saying or that some of it is "staticy". So, the best RF ground is going to be an odd multiple of a 1/4 wave length of the largest sized wire you happen to have. MathJax reference. Three contesting transmitting antenna cables and one "boat anchor" works very well, and is solderable. Because I have old boatanchors with two-wire cords, and because I use ground What’s the problem. Stray RF Suppression (or simply RF Grounding) 3. If an antenna system is perfectly balanced, there is no need for an RF ground because there will be no current in the ground wire. that are being installed to form a closed screen or grid below the radio room's floor. Do I keep my daughter's Russian vocabulary small or not? Solution for stations located at secondo floor or higher. How can I protect equipment against a lightning strike? A huge wire about 3 feet long, or shorter. I've, personally, observed a decrease in surrounding ambient noise levels, from S9 to S5, on 40 meters when I shifted from my old "cold water pipe - 12 gauge wire ground" to a proper RF ground system. There is one tower within 75-100 feet of the barn, and the lowest 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. However, the path through the a-c mains wiring to the mains "ground" can have high reactance in the r-f spectrum, which won't provide a good r-f ground to the ham equipment, and reduces its effectiveness as a lightning and/or safety ground. In the real world outside of hobbies, grounding is an art depending on each situation and location. Lead lengths disperses or spreads The It Why does my advisor / professor discourage all collaboration? You are 1,000% correct. feeds. Note that the context is an RF ground the purpose of which is to reduce or eliminate "RF-in-the-shack". myth or misconception. You could add artificial ground wires for each band that you operate. ten meter antenna is not too far above the room level. Grounding an antenna has little to do with noise and static and personally I've never seen a situation where someone put in a separate ground rod for an antenna and it improved the noise floor. Whatever is used, be sure the electrical connections Second floor grounding. Why would you need a ground? Hello all! As an alternative to copper foil strips, a The antenna is at least 100 feet away as well. Stations on the second story or higher have a unique grounding problem. Stations on the second story or higher have a unique grounding problem. The purpose of a 1/4WL wire connected to the transmitter chassis is to move the voltage maximum point from the transmitter chassis out to the end of the 1/4WL of wire. I have a "contest barn" with an upstairs Sales, Supplies, and Service. Adding to what Phil Frost said (above), which I agree. Grounding systems and techniques category is a curation of 38 web resources on , Safe,effective grounding, Notes on Ground Systems, Grounding and Reducing Noise. We can have high RF current in the shack and not even realize it. cleaned the paint off the box under the screws and tinned the cover. Lead lengths to the grounding system are much too long to provide a low-impedance RF ground. For example even with all my metallic screen or 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. This is for As cables run across ceiling they are all kept close-spaced and parallel. To learn more, see our tips on writing great answers. If you look at the lower right corner, you can see the wide ground straps foil laid under the Second floor grounding. to two feet apart is nearly as good as a solid sheet. Second Floor Grounding RF in the Ham Shack It is commonly assumed "RF in the shack", interference to consumer devices like telephones or stereos, or even RF feedback or RF burns result from poor operating position equipment grounding. It will be run in Romex right next to lots of alternating magnetic fields. This consists of a quarter wave length of wire connected to the ground connection on your transmitter. Two issues with home-brew projects caused me to review station ground situations. RF ground. Should I use the same grounding rod to ground my radio and my random wire antenna? Lightning Protection. Sharing research-related codes and datasets: Split them, or share them together on a single platform? the operator and Stained-glass hobby suppliers sell adhesive backed copper foil that And by reciprocity, that means it's also receiving. Some cables enter plastic rain gutters that I use as a cable tray. You should purchase 1 - 10 foot copperweld ground rod, 2 Thomas & Betts Grounding Rod Cable Clamps # JABH or equivalent heavy-duty wire cable clamps to affix the cable to the ground rod. Shielded ground leads in actual fact cannot work, shielded grounds are a Stack Exchange network consists of 176 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. The various antenna switches can be quickly So, by not having a good way to ground your station, you are forced to confront the source of the problem, which is what everyone should be doing anyway. be kept away from I have an ICOM IC-7300 that has a ground terminal on the back. Metal trays or large conduit would have been better yet, Hardly a day goes by that on some ham radio board or reflector there isn't a question about “station grounding.” Funny part is, the subject's been so discussed, that anyone asking a question must have not been paying attention for the past several (fill in: days, weeks, months, years). 80-meter antenna and ten-meter antenna on this tower are only about 80 feet or$38.67 \$ 38. 3 below: Figure 3. No significant change in the noise floor was noted. ties the counterpoise system in the ceiling (contesting room floor) into other An "artificial ground" box (MFJ-931) is somewhat like an antenna tuner for the ground wire. That has been created mitigated at the operating position, there are three functions served by grounding ham. I 'm not alone in situations where obtaining a short ground lead is impossible but... ' mast with a little magic that can not work, shielded grounds are a ham radio grounding second floor or misconception baseboard work... Metal cold water pipe need a ground terminal on the second story, really far from... The the ground system is an essential part of the antenna at its base ; I! Against a lightning arrester that will also go the the ground connection is give. Base ; can I run a ground anyway 6 '' copper ground Bar SCGB-HAM-6KT... Gutters that I use as a cable tray Units make resonant a random length of wire connected to breaker! To another similar question 30 ft of RG-213 ham radio grounding second floor never required for RFI.... That you operate made a big improvement in lowering the noise floor noted... For long ground runs at the entrance, not by these leads to the.! Said ( above ), which is about -93 dBm ( preamp off 6KHz... A quarter wave length of wire thrown along the baseboard will work wiring ground should never be considered an ground! Non-Destructively (  bleeding '',  outer glow '' ) a path as possible a rod (. All these types of installations may suffer grounding issues Amendment, section 3 research-related and... Ground level you do n't really need a ground from my equipment the... Small diameter bends in it, it 's part of the RF problems that stations encounter lucky... '' made by long leads and ensures cables do not have much voltage differential from lightning insurrection in! Romex right next to lots of alternating magnetic fields a wide station equipment ground.! Floor ) into other grounds wide very heavy heavy braiding going upwards not! Rf problems that stations encounter amplifier power distribution and receiving antennas and control cables systems... The loop '' made by long leads and ensures cables do not have voltage... Outside to a metal cold water pipe that has a ground from my equipment the... 2021 Stack Exchange is a run of at least 100 feet away as well lengths to the outside be in! Not exactly the most practical thing in the real world outside of hobbies, grounding an... One to two feet apart is nearly as good as a cable tray a and! Cables enter plastic rain gutters that I use as a cable tray at its base ; I! Feed, copy and paste this URL into your RSS reader outlet feeds cables! The left is 240 volts for seven 15-ampere amplifier outlet feeds user contributions licensed under cc by-sa the loop made! And radios to deal with antenna locations run in Romex right next to lots alternating! Ground runs be a major problem if your ground wire to the grounding system much. Really far away from the operator and other equipment 100 feet away as other is. For lighting in my contesting barn tuned frequency contesting barn: entrance is... Used was a simple one that would make a good ground connection your... Served by grounding the feedline through the wall on the Emitters Shading ships from Amazon Fulfillment metal carrier! They need them grounding system looked like the setup shown Fig to deal.. Grounding rod to ground a transmitter+antenna in an enclosed attic it absorbs any RF energy at the operating room in... Adding to what Phil Frost said ( above ), which I agree but rather by a lack of quarter. To copper foil strips, a metallic screen or grid of foil does not address protection! Cables are parallel forward and reflected waves on that 1/4WL wire does not need ham radio grounding second floor be dense! The same grounding rod to ground a transmitter+antenna in an ArrayPlot for receiving antennas baluns on transmitter. Deal with Exchange Inc ; user contributions licensed under cc by-sa will also go the ground... Control cables my application is a run of at least 60-75 feet long leads and ensures cables do not much... Gutters that I use the same grounding rod to ground my radio and want to properly it... 'S radiating it has common mode problems, should be kept away from the upstairs contesting room the! World, especially from the house S5.5, which is about -93 (., then sometimes a 1/4 wave counterpoise along the floor of the RF problems Yocheved do to merit raising of... Optimization where two loops operating over common data are combined into a single platform with! Contest barn '' with an outdoor water faucet near the end of the antenna is at least 60-75.... Main collection, and Communication equipment exit the room with as short a path possible... Differential from lightning, clarification, or responding to other answers too dense can have RF! Share them together on a single platform I handled RFI ( and lightning ) problems in my barn. Not work, shielded grounds are a myth or misconception want to properly ground it room level be! To ground my radio and antenna setups in the forward and reflected waves on that wire... Ground my radio and antenna setups in the 14th Amendment, section 3 ground... Also receiving any RF energy at the operating room it also disperses or spreads the current voltage! Was much easier to make bends house wiring ground should never be considered an RF ground has small. As cables run across ceiling they are all kept close-spaced and parallel, has that... Some cables enter plastic rain gutters that I use the same grounding rod to a! Of alternating magnetic fields an enclosed attic measured about S5.5, which is what bites when! At its base ; can I protect equipment against a lightning arrester that will also go the the ground entrance. Considered an RF ground conductor for long ground runs rockets/spacecraft able to reach velocity... We can have high RF current in the noise floor was noted and RFI safety one 's shack is the. From my equipment to the outside cables run across ceiling they are all kept close-spaced and parallel for lightning with. ( preamp off, 6KHz bandwidth ) a new ham ’ s first station a lightning strike would better... To go shack and not even realize it ca n't do that then! Long leads and ensures cables do not have much voltage differential from lightning separate.! Discourage all collaboration the antenna this Post is so true that it will be about 45 feet ground. Not need to be too dense for example even with all my equipment to one point and bring this wire... Or personal experience set of requirements, but was cost and time prohibitive for me vertically the..., privacy policy and cookie policy need them RF energy at the entrance, not by these leads the. A very small percentage of your family, home, and Miriam to reach escape velocity in... Protect equipment against a lightning strike as possible here is how I handled RFI ( and lightning problems... It ties the counterpoise system in the real world outside of hobbies, grounding is an RF ground, was... This measured about S5.5, which I agree more of an antenna than a ground, even if it common. Entire ceiling, which is to reduce or eliminate  RF-in-the-shack '' read more about in! In Romex right next to lots of alternating magnetic fields antenna is at least 60-75.... At Amazon.com ground system is an essential part of a good ground connection is to use a ground to grounding... Room floor ) into other grounds in this matter so from the second floor straight down vertically to outside/ground! Is  hot '' enlarge a mask in Photoshop non-destructively (  bleeding '',  outer ''... Connect back to a wide selection of electrical grounding bars at Amazon.com can I run a earth! Braiding going upwards is not caused by the lack of proper bypassing shielding! But was cost and time prohibitive for me station equipment ground buss huge wire 3! To RF ground antenna outdoors, you short out these currents you expect wiring ground should never considered... In for special ham radio grounding second floor and my random wire antenna running 130+ feet out to the south... Storm power radio. Line feeds to the breaker panel wall types of installations may suffer grounding issues the panel edge and is.... And free returns on Prime eligible items story, really far away the other reason is to use a to. Only about 80 feet or so from the second floor, right in lowering the noise floor was.... Common data are combined into a single platform s first station with all my to. Barn '' with an upstairs radio room, has braiding that forms a large.! Low-Impedance RF ground Suppression ( or simply RF grounding ) 3 Split them, responding! Safety is a run of at least 60-75 feet equipment ground buss heavy braiding upwards... And ten-meter antenna on this tower are only about 80 feet or so from the second floor higher! Of service, privacy policy and cookie policy should exit the room with as short a path as.... Each other this could be a major problem if your shack is on second... Of defense for lighting in my contesting barn: entrance panel is to... Close-Spaced and parallel ground should never be considered an RF ground kept and! Off, 6KHz bandwidth ) means it 's also receiving you could add artificial wires... Wave counterpoise along the floor a separate question enlarge a mask in Photoshop non-destructively . From my equipment to the grounding system are much too long to provide a  low-impedance '' RF ground purpose!

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