Do ham radio antennas attract lightning

They suggest poking a hole in the existing vent and sealing it around the feedline. Here's a searching look at the mysterious process by which our antennas hurl energy from Here to There. You should use a balun. Vertical Square loop. So, if the bulk of your operation will be in town, close to the repeaters, a ¼-wave vertical should work Lightning Arrestors for SMA Antennas (Ham radio related but not really) I need to mount two antennas outside that have SMA connectors on them, the two antennas have a 6' lead on them, and then I was going to add a 10' extension to each of them and install the arrestors where the two cables meet outside on the wall of my cabin. Use the appropriate connector cables to establish a secure connection between the lightning arrestor and the antenna. One end of the wire attaches to a tree, pole or other support, preferably at a high point. This is the Surge Protector / Lightning Arrester - Connectors i In fact all of the arrestors (like ethernet if you use POE) should be connected around the same point to the same ground. For best results, solder this connection. Apr 8, 2023 · Moonbounce, also known as Earth-Moon-Earth (EME) communication, is an advanced amateur radio technique that involves bouncing radio signals off the Moon’s surface to communicate with other stations on Earth. I've seen ham radio antennas that slide over a vent stack. Tie the other end of the nylon rope to each insulator. •¼ wave Vertical monopole, which requires a ground plane (elevated) or a Ham Radio Satellite Antennas. We’re your complete source for grounding and lightning protection components, including coaxial lightning protectors, coax shield grounding kits, copper grounding straps, grounding plates and clamps Jun 21, 2019 · 6. It has been around for many decades [1]. May 19, 2021 · An attic antenna isn’t going to attract lightning anymore than the usual stuff found in the attic such as AC ducts, electrical wiring, CATV, phone, etc. It can also drain off static to some extent, but not all of it. If your roof antenna is struck, that means lightning was almost certainly going to hit your roof someplace anyway. In addition to the usual radio equipment, all the things needed for off grid power need EMP protection too. I am installing a ham radio and want to properly ground it. May 26, 2017 · Studies dating back to the 1960s show that antenna towers attract lightning strikes to a greater extent than mountain peaks at similar elevations. Sep 1, 2013 · Maybe/maybe not. Even a small power surge could interrupt important communications. In general, the taller the antenna, the more gain the antenna will have. If we had a 10kΩ resistor, then the loss would be: P = E2/R 0. Rabbit Ears antennas are grounded wire with two vertical rods to receive or send ham radio signals from other ham radio users. Conversations. Notes: Proper lightning protection for a ham radio station can involve more variables than any other type of radio site. The general "key" to mounting antennas on the same mast is vertical separation. The top 2-meter vertical antenna was literally blown in half (I later found the top part stuck in the ground like a javelin), and the radio to which it was “Lightning Protection” in the Technical Information Pages. Dec 16, 2023 · I have heard the rumors that fiberglass antennas attract lightning. MRQ213 17. 5–30 MHz In summary, setting up your ham radio station involves connecting and configuring your transceiver and antenna, powering your station with an appropriate power supply, and properly installing and securing your antennas. Separate eight-foot ground rods for each tower leg, bonded to the tower and each other. ”. There's still a lot of damaging current that ends up in the wire which will damage attached equipment. The first thing to know is that there are three functions served by grounding in ham shacks: 1. By Kenneth Macleish, W7TX QST November 1992 If antennas didn't radiate, we might be well advised to dispose of our ham gear and take up another hobby. A random wire is exactly that—a piece of wire that’s as long as you can possibly make it. I tend think the latter after asking a few hams who went the commercial route to take a look inside at the components used. Proper lightning protection is an important aspect of designing a safe amateur radio station. For example, I bet a 2m whip on the corner of Oct 2, 2022 · Lightning will hit whatever it feels like, nothing you can do about it. Damage to connected devices: Lightning strikes can generate a significant electrical surge. Remember more than just lightening can kill electronics. It is also important to learn as much as possible about what could go wrong so we can avoid factors that might result in accidents. antenna. It's important to bear in mind lightning While the connectors and surge arrestors are one thing, your cable will be far more of a problem. One operator had actually used his body as an antenna for a low-powered contact. Designs vary, but there are basically three different types of mobile antennas: the ¼-wave vertical, the ½-wave vertical, and the ⅝-wave vertical. The place where a 9:1 or 49:1 transformer balun matches the off center impedance isn’t at the very end, but close to the end. Nov 19, 2017 · The off grid radio amateur has extra challenges. Loop Antennas. However, many studies summarize lightning over Feb 10, 2013 · Every ham radio operator should have a backup antenna system. Electronics Technician Volume 7—Antennas and Wave. Propagation NAVEDTRA 14092 Large 3. Keep the antenna off of the roof. One enthusiast reports, " . The bare copper wire is strung from between the insulators, as shown in the diagram. Recently, many amateurs have become concerned about possible damage from EMP, or Electromagnetic Pulse. Jan 28, 2012 · The J-Pole antenna, more properly known as the J antenna [6], is one of the most popular antennas for 2m vertical use in the amateur radio ranks. One of the most widely-used antennas for satellite work is the Arrow II generations of hams. ) 2. I know it is a good idea to disconnect all radios, tv's. The main thing about cable is DISTANCE of the cable. The usually way to connect them to the transceiver is to lay the feedline across the roof. You can use the metal parts of your structure as part of the antenna, if that makes things easier. Then, backfill the hole with soil, making sure to pack it down well so the rod is firmly in place. We ship them in kit form with clear instructions for quick assembly. Ampere = Volt/R. The static charge would have to be of a higher current than the resistor can bleed off. The antenna that needs to be installed in your attic is the one intended for the outside. It's the high temperature of the arc that starts fires. I saw it out the window and ran to my sister's room to ask if she saw it (a 10' run). #2. Electrical Safety 2. Follow the manufacturer’s instructions for proper cable connections, ensuring that they are tight and I finally got this done and installed. Because, lighting can hit that antenna and fry $ worth of equipment. While a multi-element beam on a high tower in an ideal location is the dream of most hams, few of us are in the position to be able to erect such a system. A wire dipole is a super basic antenna that works well. Now, it’s time to connect the lightning arrestor to the antenna. There can certainly be a direct path to ground for DC, but it will seldom be adequate for much protection against lightning. This rod must be long enough so that it penetrates at least a depth of 8 feet or longer. It runs from $90 to $200. You mention 75 feet. I will have a 20' mast with a long wire antenna running 130+ feet out to the south. First of all, long antennas do not “attract” lightning. Gold: 24. amateur. Good cable is worth its weight in gold. Dec 13, 2018 · March 9, 2016 AF5NP Antenna, Coax (ial Cable), Feedline, Lightning, Protection. In Stock. A single four-foot ground rod, driven into the ground no more than 12 inches from the base. The downside to that is that vertically-oriented VHF/UHF monopole Aug 27, 2021 · Otherwise your station and your house would be very vulnerable to nearby lightning strikes, even if you disconnect the coax from the radio as the storm approaches. a schematic of a protection plan. 029" spacing for a KW station, and . An electrical ground doesn’t enhance the RF radiation of the antenna, but it is an important safety feature on any installation. I am wondering if it is good idea to disconnect my coax from outside antennas during a lightning storm. It was a direct hit on a dipole I had up about sixty feet (I found pieces of the BALUN scattered around the yard), and a direct hit on the CATV line street-to May 18, 2022 · A ground rod is a metal rod that is buried in the ground, and it provides a good ground connection for your antenna. Run the wire to your radio equipment, ensuring it’s secure and protected. So If you’re a beginner, Dipole antenna can be a worth choice for you. understanding of radio. Fortunately, EMP protection has been studied by Dennis Bodson, W4PWF, and effective mitigation strategies published in QST. 9. C. For example, if you operate on HF bands, you should use an arrester that covers 1. Apr 6, 2008. 10 gauge solid electrical wire is heavy enough for most antenna systems. Use heavy-gauge copper wire or copper straps to connect your equipment to ground rods driven into the earth. 2. Will not effect the SWR reading on your antenna. If your antenna isn’t efficient it doesn’t matter what radio you hook up to the other end. One of the least understood phenomena in electrical engineering is the idea that electric and magnetic fields appear to leave a radio transmitting antenna to form what we know as radio waves. Yet antennas do not need to be large and expensive to perform well. In fact, lightning is one of the biggest causes of tv and radio equipment failure. One of the most interesting responses was in the realm of I-haven’t-but-always-wanted-to, as a ham related living at the foot of a large steel bridge, and wondered what would happen May 28, 2021 · Radials are used to increase the conductivity of the ground surrounding a vertical antenna, to aid in returning current efficiently to the transmitter. Part 2—Last month, the author discussed the characteristics of lightning and the hazard it presents to the amateur, and presented a method of preparing. 5 W = (70. Use a lightning arrestor that does not have a gas discharge tube. I have covered J-Poles quite a bit on this site [2]. The End Fed Half Wave for 80 meters is 135 feet and needs virtually no adjusting to get it on the air. • Feedpoint determines polarization • Maximum radiation perpendicular to the plane of the loop. The primary rule for Introduction. We do not expect customers to measure and cut the various element lengths Jan 26, 2012 · Wrong. The process described in Part 1 of identifying the Jun 5, 2023 · Dipole Antennas. Just do not let it use your house or gear to get there. If your primary antenna goes off the air, you should be able to construct a crude mast and string the cable to stay operational. 3. 0. You apply a little RF and adjust the antenna tuner to achieve the Jul 27, 2010 · Oct 24, 2011. Aluminium: 26. Now, 90 percent of new housing starts in the United States are subject to private land-use restrictions. You can probably get as close as a quarter wavelength and still make things work with some adjustments to the tuning. Amateur Radio activities are not inherently Aug 19, 2005 · Thanks. 8. Feb 1, 2024 · Step 3: Connecting the lightning arrestor to the antenna. IF you could attract waves, what good would it do you if you also attracted noise in the same proportion. A connection between the tower base and a cold water pipe. The good news is your standard homeowners insurance policy will help pay for the damage if the angry skies decide to hit the big antenna on your roof. Now that the coaxial cable is grounded, the next thing is to ground the antenna pole or mast. I'm planning to attend Field Day this weekend, and the forecast calls for thunderstorms. Has Pl-259 ans SO-239 inputs. rbulsara (Electrical) 19 Aug 05 19:38. The Challenge. But instead of an RF ground, the antenna should have an electrical ground to protect it in case of a lightning strike. Apr 6, 2008 · 125. Like I said, lightning is capricious. My home brew lighting/static protection for my radios. 7V)2/10000Ω P = E 2 / R 0. The far end will be about 45 feet above ground level. These CB antennas really were not designed to survive a lightning strike. 4. Connect the rod to the grounding wire using a clamp or connector. Oct 23, 2019 · For good reception, you want a good signal to noise ratio. Mobile Antennas. At the very minimum, you’ll want to have a charge controller in your Faraday cage, and maybe an inverter too. Strip a couple inches of it and wrap it around the bare copper wire. A couple of HTs—or an HT capable of duplex operation—and a handheld, dual-band Yagi, as shown in the figure below, will do. radio. Radials create a mirror-like reflection around the vertical antenna, which reflects radio waves that hit the ground off at an angle that simulates an "image antenna" beneath the surface, as Yes install the lighting arrestor but at the same time protect your equipment with additional measures like lighting rods that provides a straight forward path to the ground thats not your atenna It is better to be safe than sorry. A typical lightning bolt may carry Apr 8, 2018 · However, many lightning strikes that hit Earth nearby are by far the main hazard for ham radio gear (in my opinion, after 60 years in the hobby). Using an antenna doesn’t attract lightning. 2. No arc, no fire. The antenna location will establish the grounding requirements, while the station locati on will drive the protection requirements. Loop Antenna. Sep 4, 2007 · Once upon a time lightning missed several much taller nearby antennas and trees and struck an 18' ground mounted antenna in my back yard. Keep in mind that a lightning arrestor doesn't stop an electrical discharge event, it merely shunts most of the energy to ground. May 23, 2015 · The commercial path. 5 KWs ". Advantage of using Dipole is ease of building it and it supports wide frequency band. However, there is not any real evidence of this. Stray RF Suppression (or simply RF Grounding) 3. Do radio towers get struck by lightning? “The answer to your first question is yes, lightning is a threat to strike communication towers and can do great damage if the tower is not Apr 7, 2020 · I have an end fed random wire antenna about 50 feet from my shack into an antenna tuner. TV itself may not attract lightning, but if you have an outdoor antenna conncected to it, that will attract the lightning. Here all my antennas go into a large electrical box on the outside of the shack. They consist of a wire or metal rod that is split in the middle and fed by a transmission line. This method allows radio operators to make contacts over vast distances, even thousands of kilometers, without relying on traditional May 4, 2012 · As for the second half of the question: yes the J-Pole should be grounded. Just because an antenna is inside the walls of your house does not mean that you need an internal antenna. That direct connection just isn't going to be heavy enough. Many hams have a VHF/UHF radio and antenna for local communication, especially if they are involved in EmComm. The purpose of this document is to detail the proper installation procedures for many of the items typically used for lightning protection in and around an Amateur Radio Station. Full-wave horizontal loop: good for short-range communications, NVIS or “cloudwarmer” antenna. The distance a signal will reach depends on a lot of things, including: Jan 19, 2015 · For the antenna to be really in the clear, two wavelengths is a good rule of thumb. What is not discussed in these and other technical documents are installation procedures and examples. 11MB download. May 14, 2022 · 1. SPX-100 9 Band Plug N Go HF Portable Antenna Moonraker. After antennas, station grounding is probably the most discussed subject in amateur radio and it is also the one replete with the most misconceptions. Here are several considerations that will influence your decision: l) Safety 2) Available real estate 3) Available supports 4) Single-band or multiband operation 5) Possession of or need for a Transmatch 6) Type of operation (stateside or DX) There may be some compromises inherent in these conditions. Install your copper grounding rod. 78. Random Wires. Static buildup on the antenna during a cold, dry winter day can zap a port easily if your antenna system isn't properly grounded. When lightning strikes a home antenna, several things can happen. About Feb 1, 2024 · Make sure you connect the cables horizontally at the coaxial ground block connectors. I can picture a serious issue with a bunch of temporary antennas set up in an open area when a thunderstorm sweeps through. I may be thinking a bit more of lightning than most took a big hit about five years ago. It is easy to build and can be made for as little as $10. Mar 29, 2013 · The easiest is to ground your antennas and tower so that a lightning strike will go into the ground and away from your house. The exception is when we look at very tall towers. com FREE DELIVERY possible on eligible purchases Feb 25, 2022 · Some grounds are for electrical safety, some are for RF to make an antenna work as designed, and some are for lightning safety. They have more noise on ham radios than rubber duck antennas but they do have better range. My favorite feature is the versatile feed adjustment provided by the J part of the antenna. Aug 29, 2019 · Fortunately, a lightning rod intended to dissipate lightning also works well to divert it. I. That about lightning protection is a sort of exaggeration. Note this is an approximate solution that is valid only if the resistor is much larger than the feedpoint impedance. When it comes to lightning protection, PolyPhaser® is the recognized leader for providing superior performance, reliability, and multi-strike capabilities. PolyPhaser’s® patented products are designed to protect the most sensitive equipment for Amateur Radio, Military, Emergency Communications, GPS and many other RF and Microwave Feb 1, 2003 · Electromagnetic Radiation Explained. Establish a single-point grounding system for your amateur radio station, connecting all equipment, antennas, and lightning arrestors to a common ground point. Lightning Safety. Nov 10, 2021 · One of the most common mistakes is buying an indoor antenna. Lightning Protection. This prevents water from entering into the cables. Understandably, new ham radio operators are often overwhelmed by the options available to them because of the variety Grounding & Lightning Protection. The other end connects to the random-wire connector on a suitable antenna tuner. 5 ft. Thus the need for a short counterpoise (so 5 to 15% of the antenna is on the other side of the transformer/balun) to optimize Rabbit Ear Antenna. I suppose an attic antenna would not itself attract lightning like an outside one, but over the years I've had a couple of garage door circuit boards in two different houses damaged from neighborhood strikes. The ground lug on your transceiver is provided so that the operator can ground the case, which is usually also connected to the shield of the coaxial cable, to an RF ground. Damage to the antenna: The immediate and most obvious effect is that the intense energy from the lightning can physically damage or destroy the antenna. Your attenuation for LMR-400 at 450MHz is 3. For example, if your goal is to work the Before we go, let’s review those top 5 antennas for new HF stations. 3dB per 100 ft. However, the manufacturer provides instructions for hiding the feedline inside the vent. I will be including a lightning arrester that will also go the the ground. PolyPhaser makes several DC blocked lightning arrestors that have an inductor to ground instead of a gas tube. I have been taught that such EMP will induce voltage on antenna wires, power lines, guy . Regardless it is advisable to turn the TV (and like devices) off during a storm as lighting, even strck a few miles away, could induce voltage spikes in the electrical Yes; disconnect all your base & mobile antennas, put the ends in a glass pop bottle, duct tape & watch the lighting bolt come through, explode the bottle, send high-voltage electricity all throughout your house and [probably] electrocute everyone inside to death is better than losing a radio any day of the week. The huge electromagnetic pulse generated by such nearby strikes spreads in all directions at the speed of light. #1. Use an insulated wire to connect to the copper wire at the end closest to your radio. To install a ground rod, you first need to dig a hole about 8 inches deep and place the rod in the hole. 7 V) 2 / 10000 Ω. An end fed isn’t really an end fed, but a highly off center fed, off center fed dipole. Aug 9, 2023 · Frequency range: Coaxial lightning arresters should match the frequency range of your radio system. 5 W = ( 70. The second cheapest option, and probably the most popular purchase among hams is a simple Okay not directly related to antenna/radio but it is to lightening and it's odd behavior. Nothing wrong with buying commercial, but a $170 protector for a $390 I made my own window pass-through with a 4' 1"x6" board, a 3" SO-239 barrel connector, a ground rod, and 6' of 6GA copper wire. They are designed to have better reception and greater gain and range than many indoor 3. Connect the wire to your antenna using a grounding block or connector. Dipole antennas are one of the most popular types of ham radio antennas. Recommend using a 10 AWG copper wire as the ground wire for this arrestor. The antenna will need to have a DC ground to the mast too. Lightining rods provide the path of least resistance for lightning to enter the ground through paths OTHER THAN the house. They are easy to build, just cut a section of wire and attach it to your ham radio with crocodile clips. 47 Watts. A backup antenna can be as simple as a spare antenna, like the KB9BR 2 meter J-Pole Antenna tucked away in the garage along with a spare length of coax cable. Our purpose here is to explore the Dec 14, 2012 · Product Description. Ground screw. rec. #6. Jul 17, 2023 · Posted July 17, 2023. A ferrite-core RF choke connected between the tower and ground. It is the same principle as providing the path of least resistance when grounding an antenna. HLP-6 50MHz 6M Halo Loop Folded Dipole Antenna Moonraker. Fortunately, they do radiate. Stainless Steel Telescopic Antenna (70MHz-14. A lightning strike can destroy a variety of elements of television and radio apparatuses, including antennas, masts/towers, transmitters, amplifiers, and receivers. Running a single 10ga strand of copper wire will evaporate in the same millisecond the lightning hits your antenna. Part 1—Lightning protection can be a serious issue for amateurs. If you where to have a 1000V static charge from the antenna it would have to force a 100mA constant current. This seems to have the potential for multiple fatalities (it has happened under conditions without the lightning attractants, such A lower resistivity means you will need less of a metal to reduce the resistance to an acceptable target. The theory is that the wind blowing across the fiberglass generates a static charge that attracts the lightning. These nearby conductors may "de-tune" the antenna and change the pattern and/or the SWR. Yagi-Uda Antenna. An equally common, but equally vague, answer is, “It depends. The most usual "solution" is to ground the feedline and/or antenna mast, which creates two grounds: the mast ground, and the electrical service ground. (Some antenna designs, such as folded dipole or folded dipole Yagi antennas, inherently have a DC ground on the active element due to the nature of the antenna design. The cheapest ham radio antenna is normally a 1/4 wave ground plane antenna. Feb 23, 2018 · To reduce power-line induced noise in your shortwave radio, shortwave longwire antennas should be run perpendicular to, and away from, utility power lines. Make it a habit to plan your work carefully and always consider the safety aspects or your Ham Radio activities. Non-dish antennas DO NOT focus light in reception, but a phased array of them (eg a Yagi) can be used to selectively capture signal and noise from a particular direction. Jun 23, 2020 · A strike from lightning can damage your roof, electrical wiring, appliances, and personal property. €47. As the rod is solidly grounded, the strike current prefers to follow the grounding conductors and as such does not create arcing within the structure. Quad Antenna. Handheld Antennas. In the first of this three-part series, the author leads us through the process of developing a protection plan. Lightning is just trying to find the easiest path to earth does not matter what that path is. Why would a radio connected to an antenna in an attic be any different?-- Dec 19, 2019 · Please explain. Virtually all of these have provisions that either prohibit outdoor Amateur Radio antennas outright, or else Nov 24, 2009 · The responses were fascinating and ranged from old bedsprings to window screens. Commercial rotor control protection systems must use un-obtainium in their construction or are priced at what the market will bear. Ideally you have an exterior antenna up high for best performance with your radio. Here's a selection, ordered from lowest to highest resistivity in nano-ohm-meters (nΩm), of some metals you might consider using in an antenna: Silver: 15. Dec 1, 2022 · Buy UHF Coaxial Lightning Arrestor PL-259 Lightning Surge Protector Suppressor PL259 UHF Male to SO239 UHF Female Coax Cable Surge Protector for RF,VHF,UHF,CB Radio, HAM Radio Gear, 2-Way Radio,Antennas: Surge Protectors - Amazon. For Two Way, CB, Amateur Radio, Scanners & other antenna systems. 1kV divided by 10k = 0,1A. Introduction. They merely act as long inductors that get a voltage spike from the nearby lightning arc. Your range on ham radio starts at 5 miles with a simple handheld and extends all the way around the world once you have the right license and equipment. Back in the 70's, during a heavy rain storm lightening hit a 60' pine tree some 600' from my home. Protect your equipment from lightning damage with grounding and lightning protection from DX Engineering. Log-Periodic Antenna. One of the cool things about working the FM satellites is that you don’t need a lot of sophisticated equipment. These antennas are omnidirectional and have a low take-off angle, making this type of antenna perfect for beginners. We probably want at least a 1W resistor here, but more would not hurt. CB Antenna. Zinc: 59. One answer is “all around the world. Antennas should be ground bonded to the tower and the tower bonded to an eight foot ground rod buried at the base of the tower. What it I am wondering is the coax before I split it off to other rooms, if I should just disconnect it and let it just hang rather than being plugged into a splitter? Lightning Arresters & Surge Protection products from Ham Radio. e. Anyway, to answer your question, I would wrap the coaxial connections and about 4" or 10 cm of the coax with black self-fusing stretchy silicone tape, which is great for keeping Apr 8, 2023 · Grounding: Proper grounding is essential for lightning protection. Jul 9, 2020 · 1. 045" spacing for 2. The future of Amateur Radio is indeed dim without it. I do not have the option to install a ground rod at the house entrance but I do at the antenna feed point. Get them as far apart as possible vertically and see if when one or the other radio transmits it desenses the other radio's receiver. By following these step-by-step instructions, you will be well on your way to operating a successful ham radio station. I was there at the time and observed that the flash and impossibly loud thunderclap were simultaneous. The A-28 lightning arrestor is the best TD1016: An overview of Lightning Protection for Ham Radio Stations . Safety begins with a proper attitude. Adding a decent ground, depending on how it's done, might make things worse. It is because when you have lightning, the entire system (antenna, transmitter, cabling, etc) is floating to high voltage and the inductance of the conductors will cause a voltage drop to ground and it will look for the Sep 9, 2008 · A number of years ago, lightning struck the amateur radio tower behind my house. If the antenna pole is metal it may be worse than better as it might itself attract lightning. All our “Lightning Antennas” are true quads beams which feature 6061 T6 seamless aircraft grade aluminum boom and sleeving, strong fiberglass spreaders and 13 gauge enamel coated copper element wire. The final part will cover the process of creating an effective ground system. Specialising in new & used Ham (Amateur) Radio, Commercial Two-Way Radio, Marine & Aviation equipments. Next: how to protect your equipment. The process involved is easier than the one explained for grounding the antenna coaxial. It can also start fires and even injure people in your home. D. The rig is grounded for electrical safety Feb 1, 2003 · Electromagnetic Radiation Explained. Copper: 16. Dec 20, 2011 · Dec 21, 2011. In your case it would be only one radio transmitting but you get the idea. Just adding a discharge tube will do little to nothing to protect equipment. Lightning surge protector for Coaxial cable. 1000V x 0,1A = 100Watt. Solar panels themselves are generally regarded as immune from all but the End Fed Wire Antenna. B. It followed the buried coax into the shack, arced about a foot to the ground bus, blew the PL-259 off and left a burn mark on the wall. Having rods in adjacent trees is not likely to reidrect lightning strikes. Ham radio antennas come in various types, each with its own characteristics, advantages, and disadvantages. Vertical and Inverted L Antennas. Conductive objects do not “pull in” lightning like some sort of plasma vacuum, the effect is typically much less pronounced. Jul 23, 2021 · If the antenna is on a balcony, then you probably have wires or pipes in the walls that are within a wavelength or two of the antenna, unless you only operate at UHF or higher frequencies. 3MHz) Moonraker. This installment shows us the type of protection to apply and how to design the protective installation. es ct mu jb ox ld do vd ox ef