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K0UO Rhombic, curtain, & Vee Beam Antenna Farm, Rhombic antenna largest in the world traveling-wave (fast-wave) antenna, V-beams, Receive Directivity Factor (RDF) towers, VOA, W1AW, W6AM, Beverage, HF curtain, Broadcast tower, ham radio, balun, IEEE, terminating resistor, E and H field, far field modeling, antenna measurements test range, NEC2 NEC4, k0uo, wire antennas, Curtain antennas, baluns, VOA sites, LPDA, W6AM, W7URA, Feed-lines, and 4KS Walz Airport at Kiowa, KS. Antennas.....before Amplification Welcome to K0UO's premier ham radio antenna site farm, spanning hundreds of acres dedicated to innovative design and rigorous testing of antennas. The largest in the world, so join me in advancing the field of ham antennas radio with cutting-edge technology and expert guidance. This station has been very competitive, and has won many major worldwide amateur radio contest. High-Frequency Stock Trading groups should use the rhombic antenna. RSI Corp in Barber Country KS works with Hyperscale AI Data and Network operation Centers developing Environmental Health and Safety EH&S surveys and programs. The Defense Technical Information Center is RSI's central facility for the collection and dissemination of scientific and technical training information. RSI Corp in Kiowa, Kansas, specialize in performing these surveys to ensure safety and compliance. , RSI has surveyed some of the largest Network Operations Centers (NOC) and AI Data centers for groups like Verzion, T-Mobil, DOD, UPS, FedEx, and AT&T over the years. Radiofrequency Safety International's Technical group has performed technical, safety, RF EME and general hazard inspection assessments at thousands of sites throughout the country, including many AI data center, MOC, major broadcast sites, tower antenna farms, major buildings, and DOD installations. Analysis: Comparing measurements against regulatory limits set by agencies like the EPA, FCC, FAA or OSHA. Hazardous communications analysis Steve Walz has sat on numerous boards and committees and is nationally recognized as one of the leading authorities on electromagnetic energy exposure issues, and has trained tens of thousands of people. He has surveyed thousands of sites using the methods he authored in Superior Survey Techniques, which is the industry standard for OSHA, FCC and EPA EH&S surveys. He has written safety plans for virtually every type of organization. RSI supplies training and assessment services to the United States and other governments. Since the 1990s, RSI Corp, located in Barber County, Kiowa, KS, has provided expert Environmental Health and Safety (EH&S) services to some of the largest data centers and NOCs. Their clients include Verizon, AT&T, T-Mobile, the Department of Defense, Google, UPS, and FedEx. This post explores how RSI Corp supports these critical infrastructures through thorough EH&S surveys, tailored programs, inspections, and training, helping clients maintain compliance and safety in demanding environments. Welcome to the K0UO Ham Radio Station, home the world's largest antenna site and test range, spanning impressive 1,200 acres. Featuring miles of antennas and towering structures—including FCC-registered towers up to 195 feet and is also a FAA-registered facility (4KS)—our facility is a dream destination for serious contester and big gun operators. "I hope others will carry on the tradition, and art of the large Rhombic Arrays in the future". Also K0UO has a blog page about his large 40-meter wire Delta Loop multi element beam. The site has numerous 100 foot wooden power-line poles, concrete silos, and portable mobile towers, the K0UO Rhombic Farm stands out for its significant height and capabilities. Registered under Antenna Structure Registration number 1216715, our station is recognized in the FCC public file, credibility and verification that sets us apart from other so-called big gun ham stations. The station and antenna farm uses very complex highly engineered arrays. The K0UO station is designed for maximum gain and directivity, utilizing high-performance, large-aperture antennas that require significant space, high gain, height, and great engineering. k0uo uses Re-entrant Rhombic array is one of the highest forward gain HF antennas with its 90% efficiency, the highest forward gain of any HF ham antenna. Also a world-class multiple stations, with many large LPDA yagi type beam antennas, 195 to 300 foot towers, and multiple very large wood power-poles. Antennas from 160 meters up to 2 meters. Using the new Icom IC7760 as the main transceivers. K0UO has years of expertise in contesting, DXing, using cutting-edge engineering and technology. K0UO uses many very high-gain directional LPDA-Yagis beamed at all continents, large 160 -40 meters four square verticals, stacked systems of rhombics, a model director current coupling of a 40 meter Delta multi element loop beam for ham radioV-beams, and curtain arrays, The achieved goal has been met to have a world class station with multiple antennas combined (stacked) for increased gain and better performance on all the amateur bands, that are optimized for maximum gain. All utilizing optimum take off angles. With 1200 acres near by to test and build all types of antennas and tower pole supports, also the largest ham radio station in the world with miles of wire arrays and many towers, Antenna Test Facility ATF, electromagnetically-quiet areal—K0UO is Largest by measured tower height/count, antenna quantity/gain, land used for arrays, (since OH8X in Finland, tall tower and 160 meters beam in Finland was destroyed by a storm in 2013). Miles of antennas for ham radio dozens of tall antenna support structures, like FCC registered towers up to 195, to 300 foot on a near by Gypsum hills site, numerous 100 foot wood power-line poles, concrete silos, and portable mobile towers. K0UO near Kiowa, KS has High-Performance Antennas: Using large stacked LPDA-Yagi beams, Rhombics, Curtain arrays, Four-square phased verticals on specific bands, optimized for low noise and very efficient and high gain K0UO Rhombic antenna farm which is the highest forward gain array and largest area on 1200 acres in use by any amateur ham station DX, remote, or contest station in current use any where in the world Modern alternatives still can't beat the big HF Rhombic: Using K0UO +90% re-entrant re-phasing system no power is lost by terminating resistors. Yagis even stacked ones,( 4 over 4 over 4 at 200 feet have about the same gain) Log-periodic antennas Vertical phase arrays, 4 Sqs Wire antennas with tuners Phased dipoles The K0UO Rhombic farm and antenna test range is one of the very few ham radio stations that has a tower which is tall enough and required by the FCC to have a registration. FCC-registered towers up to 195 feet and is also a FAA-registered facility 4KS. The Antenna Structure Registration or ASR tower number is 1216715. So the K0UO site, station, and antenna is in the FCC public file. used in conjunction with RSI Corp of Kiowa KS seehttps://www.rsicorp.com/dtic. Use for DOD and commercial wireless telecommunications groups. RSI Corp is a Professional, Scientific, and Technical Services company that can Handle technical management, RF testing logistics, and integration of measurement instrumentation in collaboration with the facility. The K0UO antenna test range site is a highly technical facility used to precisely measure an antenna's performance characteristics, such as its radiation pattern and gain. The K0UO and RSI test and measurement facilities feature state-of-the-art equipment/software in RF performance, supported by continuous in-house calibrations. Mechanical positioners are designed to precisely orient antennas. K0UO is using AI, making it one of the largest and most sophisticated amateur radio stations in the world Antenna University https://6989df74ecaac.site123.me/ The K0UO antenna test range site has significant outdoor real estate, and over 2500 feet by the 4KS Walz airport, so anechoic test chambers are not needed. and testing site has the use of over a thousand acres around the main antennas for far field measurements. the K0UO Electromagnetic Test and Evaluation Facility is a multi-purpose, wideband, antenna test facility. The RSI Superior Survey Techniques™ RF training course, by Steven Walz is a University based program developed over a quarter of a century ago by RSI RSI Corp: Superior Survey Techniques And is now taught at the K0UO RSI antenna outdoor antenna test range site near Kiowa, KS and is a controlled testing environment used to measure and evaluate the performance of antennas. https://www.rsicorp.com/dtic What exactly does RSI do? Steve Walz says, “RSI is the leader in the field of radiofrequency emissions safety and unique general safety challenges, especially related to electrical systems, cooling, and electromagnetic emissions. EH&S safety surveys, including Hazardous communications analysis, EPA OSHA, EME and general safety assessments, ”RSI Corp. - Radiofrequency Safety International This is where Environmental Health & Safety (EH&S) surveys, including Electromagnetic Emissions (EME) and Radio Frequency (RF), Hazardous chemicals assessments, become critical. s like RSI Corp in Kiowa, Kansas, specialize in performing these surveys to ensure safety and compliance, RSI has surveyed some of the largest Network Operations Centers (NOC) and AI centers for groups like Verzion, T-Mobil, and AT&T over the years. Radiofrequency Safety International's Technical group has performed technical, safety, RF EME and general hazard inspection assessments at thousands of sites throughout the country, including many major broadcast sites, tower antenna farms, major buildings, and DOD installations. Radiofrequency Safety International and Steve Walz is using AI which is now becoming an advanced tool in analyzing, developing, and expanding research. Also there is a blog about the Cessna Skymaster 0-2 Prototype, C336, C337, C337 Pressurized, O-2 A, O-2B Military FAC plane, Navy O-2, Rhodesian FA337, AirScan now A2G modified fleet on C337 Cessna Skymaster with IO550 engines, Miss Belize Cessna Skymaster O2 aircraft, C327, Nicknamed the Oscar Deuceand by the military, In 1965, the USAF at Eglin AFB, FL, modified a 336 with four sets of hard points on the wings, marker smoke system and had a one time STC approved by the FAA. The serial number on that plane is 336-0026. Brig General Steven Walz, Overview: Trying to be retired: Civil Air Patrol (CAP), 35 year member of MARS Military Auxiliary Radio System serving in both U.S. ARMY and later the U.S. Air Force program, Security Clearance, Founder of RSI Corp, Borderline Economic Development, RSI Wind, RSI Two-way radio (Kenwood & Icom), Borderline Electric, KPAK FM, Walz Farms, proudly serves on a number of Boards over the years, Technical advisor for Concrete Walz Fencing, Published in various trade journals and author of a number of white papers. FCC Commercial License Examiner from ETA, Life ARRL member, ARRL Volunteer Consulting Engineer for the Midwest Division, ARRL Emergency Coordinator, ARRL Technical Specialist, American Legion Amateur Radio Club, Armed Forces Communications and Electronics Association, Radio Society of Great Britain, Society of Broadcast Engineers, Federal Emergency Management Agency’s (FEMA) Emergency Management Institute contract instructor, The Radio Club of America, Association of Former Intelligence Officers, American Society of Safety Professionals, Life member Central States VHF Society, Royal Order of Wouff Hong, The Rag Chewers' Club, a founding member of the Great Salt Plains Amateur Radio Club, past Director for the Kansas Oklahoma Repeater Link System The KØUO Rhombic Antenna Farm in Kansas, consisting of many acres, with "Miles of Wire in the Air & On the Air". K0UO Steve Walz is a highly experienced amateur radio operator, best known as an antenna Experimenter, Contester, Ragchewer 1st and DXer for fun! "It takes years of Passion, Hard work, and Commitment to build a great station "super mega" which includes an extensive antenna farm (details on specific arrays are highlighted in various ham community discussions as among the most impressive for DX and remote contesting, running a multi/multi station The #1 Amateur “Super Ham HF Station” & Rhombic farm K0UO supports ARDC, Amateur Radio Digital Communications Community Governor of Minnesota Tim Walz, is a distance cousin (Nebraska and Germany) to a RSI Corp CEO Miranda Walz Allen who run for U.S. Congress in the 4th district of Kansas in 2016 and "Brigadier General Steve Walz" of Kiowa, Kansasan actual photo view of the install of one the one of the forty, 8000lb +100 foot wood poles in use at the Steve Walz K0UO largest ham radio station and antenna farm in the worlds with over 1200 acres of antennas and towersoptimized antenna farm having one of the most comprehensive and effective multi-transmitter stations, featuring a high density of towers and antennas. stations are designed to maximize signal strength and reach, often using massive, towers and vast, antenna farms to dominate in international competitions and long-distance communications. The rhombic and curtain arrays have extensive, high-gain antenna arrays that provide massive signal power. Used by International recognized top contesters and DXers as their remote site. Using the many high-performance antennas which are optimized for contesting and DX, this remote station is becoming Mini contesters and dxers Secret station which a utilize not only for transmitting but pulling after week ones with the up to eight 1500 ft 2-wire beverage receive antennas. k0uo is a "mega HF site and station" with massive views of the Red Gypsum Hills and low takeoff angles completely covering the globe with antennas 25° wide over 16 DB each aiming at 14 selected directions enabling complete World dominance coverage on High Frequency Communications 160 to 6 meters. Utilizing over 50 antenna support structures up to 320 ft High, all on the huge Ranch Walz Farms and 4KS airport DESCUBRA A FAZENDA DE ANTENAS RÔMBICAS K0UO Sua fonte de referência Perguntas frequentes General Setting up FAQs How can an FAQ section benefit you in reviewing this site? An FAQ section helps in addressing common questions about building large HF antennas along with other general info Where can I find parts for rhombic and V Beam antennas? SEE: https://www.k0uo.com/post/voa-100-000-watt-balun (https://www.k0uo.com/post/voa-100-000-watt-balun) https://www.k0uo.com/post/termination-resistors (https://www.k0uo.com/post/termination-resistors) https://www.k0uo.com/post/feed-line-systems https://static.wixstatic.com/media/77aad9_b4879a8cc2a044bc8450bc161b9ddfbf~mv2.png What types of antennas does K0UO Steve Walz specialize in for amateur radio and broadcasting? I specialize in a wide range of advanced antennas suitable for both broadcasting and amateur ham radio enthusiasts. Which include Rhombic antennas, V Beams, Sterba Curtains, HRS “Billboard” Arrays, Bobtail, HRS, USIA or Distribution fed curtains, Rohn "G" 25-65 & Export 26KD, J, K towers, Delta Loop beams, (4) Foursquare verticals, Beverage receive antennas, antenna Vibration Dampers, and Log-Periodic Dipole Arrays (LPDA). These high-performance antennas are crucial for reliable long-distance communication. Modeled after setups used by W6AM, Voice of America (VOA), BBC and the American Radio Relay League (ARRL), our antennas meet the high standards required by both professional broadcasters and dedicated amateur radio operators. Whether for large-scale broadcasts or enhancing your ham radio setup, our antennas deliver the quality and efficiency you need. What is best receive (RX) antenna for the lower HF bands, 160- 20 meters? The Beverage antenna serves as a versatile tool in the realm of radio communications, offering both bi-directional and directional capabilities depending on its termination. Its unique properties make it an invaluable asset for amateur and other radio enthusiasts, professional operators, and researchers alike, enabling them to capture a wide array of signals with clarity and precision. Major Advantage, all long Traveling wave antennas are known for fantastic Improvements in the reduction of signal fading, which is called QSB by amateur radio operators, for both transmit or receive. https://www.k0uo.com/post/the-beverage-antenna-is-a-traveling-wave-antenna How can AI be used in amateur ham radio? YES' AI tools can analyze past contest data, predict band openings, and even suggest the best times to operate for maximum points. AI-driven simulations and optimizations are pushing the boundaries of what is possible. In fact K0UO is using AI today, making it one of the largest and most sophisticated amateur radio stations in the world. https://www.k0uo.com/post/using-ai-for-ham-radio-contest-planning-dxing-and-station-design-automation Does K0UO really have big HF antennas? Yes, The K0UO Rhombic Farm has miles of wire array, beams and delta loops high in the air and in use daily, see at the link below, just skip the header page and go to the blog https://www.k0uo.com/post/the-king-of-wire-antennas-is-a-rhombic Does K0UO really have an airport at the stations site" YES FAA Public Airport called "4KS Walz", near Kiowa, KS. And is part of the large K0UO/RSI Corp outdoor test site. It is parallel to the 4KS Walz airport making the test range over 2500 feet for one of the far field ranges, using a portable tower and drones loaded with standardized calibrated RF, EME, and field strength survey instruments (used for DOD, Ham, Commercial wireless telecommunication antennas, AI Data Centers and MOC). The K0UO is a highly technical facility used to precisely measure an antenna's performance characteristics, such as its radiation pattern and gain. K0UO has significant real estate or so anechoic chambers are not needed. https://www.k0uo.com/post/4ks-walz-airport Can a Rhombic array have more gain than a stack of yagi beams? YES, The Big Advantage, all long HF Traveling wave antennas are known for fantastic Improvements in the reduction of QSB fading, for both transmit or receive. A larger Rhombic and gave 14 to 18 dBd of forward gain. https://www.k0uo.com/post/high-gain-bets-beams https://www.k0uo.com/post/understanding-the-essentials-of-antenna-gain-measurement In fact K0UO is now using AI, to get more gain out of the rhombic arrays, making it one of the largest and most sophisticated amateur radio stations in the world. Tell me about the VOA Ohio Rhombic site A: Its connection to the VOA site in Ohio underscores its historical and technical significance; the VOA site shares a heritage of high-quality international broadcasting and innovative antenna technology. By integrating knowledge and practices from this legacy, the Tech Forum supports enthusiasts and professionals with detailed discussions, practical advice, and state-of-the-art techniques aligned with the standards demonstrated at the VOA Ohio facility. The site is a collaborative environment that promotes both technical advancement and preservation of broadcasting excellence in amateur ham radio. https://www.k0uo.com/post/voa-bethany-ohio Tell me more about this site and the K0UO Rhombic Farm A: The General Steven E. Walz Tech Forum is distinguished by its expansive site covering hundreds of acres, hosting some of the world’s largest and most advanced amateur ham radio antennas, including Rhombic antennas, V Beams, Sterba Curtains, Towers, and LPDA arrays. This extensive infrastructure enables superior broadcasting and reception capabilities, fostering exceptional communication performance, rare in most amateur radio forums. https://www.k0uo.com/post/exploring-the-advantages-of-rhombic-hf-antennas-for-long-distance-communication K0UO Logo https://static.wixstatic.com/media/77aad9_4d129afa7eb94f22a24d5f8dbaa201f0~mv2.png K0UO is now using AI, to get more gain out of the rhombic arrays, making it one of the largest and most sophisticated amateur radio stations in the world. What is a Rhombic Antenna? A: THE ARRL and RSGB Diamond Logo, looks like a Rhombic Antenna, the "PHD" of wire antennas The Rhombic is the antenna that won WW2 for the Western Allies https://www.k0uo.com/post/rhombic https://www.k0uo.com/post/the-king-of-wire-antennas-is-a-rhombic K0UO is using a Rhombic Array, so what is it? A: THE ARRL and RSGB Diamond Logo, looks like a Rhombic Antenna, the "PHD" of wire antennas The Rhombic is the antenna that won WW2 for the Western Allies https://www.k0uo.com/post/rhombic https://www.k0uo.com/post/the-king-of-wire-antennas-is-a-rhombic Is the Rhombic Array a good antenna for Contest and DX stations? A: Yes Rhombic Farm KØUO: Home to the World's Largest amateur radio (ham), High Frequency (HF) Wire Antennas. With the four rhombic arrays and three V-beams, the K0UO antennas effectively cover 14 directions, every 25°, the beam width of each array. The KØUO Rhombic Antenna Farm in Kansas, consist of many acres, with "Miles of Wire in the Air & On the Air". Best known as an antenna Experimenter, Rag-chewer 1st, Contest &r DX for fun! "It takes years of Passion, Hard work, and Commitment to build a great station". https://www.k0uo.com/post/the-king-of-wire-antennas-is-a-rhombic In fact K0UO is using AI today, making it one of the largest and most sophisticated amateur radio stations in the world. How did the Rhombic arrays help in WW2? A: Rhombic antennas became a backbone for the Allied and Axis forces, enabling secure, high-power links and effective signals intelligence. https://www.k0uo.com/post/harnessing-the-power-of-rhombic-antennas-in-wwii-military-communications Are there beams antennas, other than the yagi for HF, that work? A: The Log Beam or LPDA is a purposefully designed antenna, not a compromised one, which was part of a United States Air Force "Secret" project in the early 1950s. It provides more gain than Hex-beams and most Triband Yagi beams. https://www.k0uo.com/post/log-periodic-dipole-array-or-lpda Does diversity receive help to work DX and win Contest? A: Yes, The Icoms, Flex, Anan, and supposedly even the K3/K4 have dual diversity processing and tracking not just dual receivers, a big difference. I have played with the Flex and Anan, if you have a lot of time with software you can probably actually do more. In fact K0UO is now using AI, to get more gain out of the arrays and receivers, making it one of the largest and most sophisticated amateur radio stations in the world. https://www.k0uo.com/post/diversity-receive-is-used-100-of-the-time-at-k0uo https://www.k0uo.com/post/using-ai-for-ham-radio-contest-planning-dxing-and-station-design-automation What is 1/2 Rhombic, Half Rhombic Vertical Array/ https://www.k0uo.com/post/vertical-polarized-1-2-rhombic https://www.k0uo.com/post/_math Are V Beams easy & low cost to build V Beams are easy, low-cost antenna that might be perfect for you. With a single taller support and sloping Vees, it offers high gain, low cost, and no moving parts to change directions. Using switches eliminates the need for a rotator, providing access to every direction, every band, and every time, with multiple V Beam antennas. https://www.k0uo.com/post/v-beams-hf-wire-antenna-veebeam Does K0UO have a large outdor antenna test range site? https://www.k0uo.com/post/mastering-antenna-gain-testing-techniques-for-testing-high-frequency-antennas https://www.k0uo.com/post/using-ai-for-ham-radio-contest-planning-dxing-and-station-design-automation In fact K0UO is using AI today, making it one of the largest and most sophisticated amateur radio stations and test range in the world. What kind of wire does K0UO use for the big HF wire antennas? https://www.k0uo.com/post/using-wire-rope-cable-for-antennas-wire Can you tell me about Art Bell's W6BB, big loop rhombic array? A: ART BELL, The Former “Coast to Coast AM” Radio Show Host, and ham radio Station W6OBB, SK. This page is about his ham Big Double Loop HF antenna, which was not really understood by many. https://www.k0uo.com/post/art-bell-the-former-coast-to-coast-am-radio-show-host-and-ham-radio-station-w6obb-sk-this-page How do Rhombic antennas stop fading known as QSB? A rhombic antenna is designed to spread the receiving elements over a very large physical area (acres) — often extending many wavelengths across. Traveling wave antennas are known for fantastic Improvements in the reduction of signal fading, which is called QSB by amateur radio operators, for both transmit or receive. https://www.k0uo.com/post/the-physics-of-fading-and-why-huge-acres-wide-rhombic-arrays-stop-signal-fading How can I find if the bands are open to DX A: Propagation is your friend as an amateur, the more you understand, the better you'll enjoy radio, so see https://www.k0uo.com/post/are-the-bands-open Ace DX program used at K0UO https://static.wixstatic.com/media/77aad9_e1e47be3b19e4a4bbd1a665b9ef2025f~mv2.png How large are your Rhombic Arrays? They cover 6 to 7 acres each, and are 100 feet in the air. https://www.k0uo.com/post/6-1-2-acres-antenna Do you have info on the FCC RF Safety MPE Rules for RF sites ? A: See my group, RSI who is a pioneer for Telecom Safety’s Best Management Practices, now RSI is the most respected and oldest RF safety organizations within the industry. RSI’s relentless pursuit of client satisfaction and client-centered focus is what has made RSI a market leader in RF Safety. https://www.k0uo.com/post/faq-questions https://www.rsicorp.com/ https://static.wixstatic.com/media/77aad9_734bd3691a2c4d278971e314658e1476~mv2.png Who else has used large HF Rhombic antennas? https://www.k0uo.com/post/hams-with-rhombic W6AM Antenna Farm https://static.wixstatic.com/media/77aad9_b04bf7c7242e4aac90dede7ff7a5b5d1~mv2.png What is antenna gain? https://www.k0uo.com/post/understanding-the-essentials-of-antenna-gain-measurement https://www.k0uo.com/post/mastering-antenna-gain-testing-techniques-for-testing-high-frequency-antennas https://www.k0uo.com/post/antennatesting In fact K0UO is using AI today, making it one of the largest and most sophisticated amateur radio stations and test range in the world.

Rhombic Antenna, Vee beam, traveling wave, Rhombic farm, Rhombic Antenna V beam, curtain broadcast antenna, traveling wave Rhombic farm, beverage antenna, towers, Ham radio Rhombic antennas | K0UO Rhombic, curtain, & Vee Beam Antenna Farm https://www.k0uo.com/ wire antennas, Curtain antennas, baluns, VOA sites, LPDA, W6AM, W7URA, Feed-lines, and 4KS Walz Airport at Kiowa, KS. SOBRE O BLOG Durante anos, servi como uma fonte útil para aqueles que buscam inspiração sobre grandes antenas de fio, com ajuda ou conselhos. Reserve um tempo para explorar o blog, ler algo interessante e sinta-se à vontade para entrar em contato se quiser colaborar em um projeto junto com você.

Ham radio Rhombic antenna, Vee beam antenna, v beam antenna, traveling wave antenna, Walz airport 4KS Kiowa, KS CONTATO Submit Thanks for submitting!