Arrow antenna calculator 2. On most of the J Pole designs out there, a choke should be used as close to the feedpoint of the antenna as possible to help prevent rf on the feedline and creating difficulty with SWR readings. This antenna can be mounted on a simple push-up mast and rotated by hand or with an inexpensive light duty rotor. Below is a typical setup using an SO239 with PTFE insulation. Enter . Plan to see what I can do with it tomorrow. ” Physics is indeed the most fundamental of the sciences that tries to describe the whole nature with thousands of mathematical formulas. The elements are aluminum arrow shafts; a… Oct 7, 2024 · Use this calculator to find the dimensions of a Dipole antenna [1] designed to operate at a specified wavelength or frequency. Jun 5, 2021 · The Antenna Calculator for Half-Wave Dipoles. Only female BNC is available. The well-known American author, Bill Bryson, once said: “Physics is really nothing more than a search for ultimate simplicity, but so far all we have is a kind of elegant messiness. Calculator. However they did publish the patterns. In this article, we will show you how to calculate the total antenna height for the three Arrow GNSS receivers most commonly used for RTK purposes. Model 52-4S 6 meter Beam . Jul 11, 2018 · I guess since this antenna seems to work just fine (I found a YouTube video showing one guy in the UK using it), I’m guessing that the elements don’t need to be perpendicular, but there must be some reason that Arrow and Elk build them that way. λ - Wavelength. The explanations below provide greater detail on optimizing your antenna array. or 100. 7. (split boom add 1 oz. 00 excluding tax, shipping/handling. Anyone know? With a little more Googling, I found VE2ZAZ’s homebrew satellite antenna. It'll also provide you with your antenna's corresponding wavelength value and the option to use an adjustment factor [k] calculated using your dipole conductor's diameter. Minor assembly required. No endorsement may be inferred from the mere listing of a URL or link. And gave it a rest, (the XYL calling supper time and then trip to town). If you have no particular preference within a given ham radio band, then simply enter its center frequency (i. The OSJ (Open Stub J-pole) antennas from Arrow Antenna are designed to operate without a ground plane and to be very robust. Enter The Arrow - even more heroic than the TV character. Parts Catalog antenna with the Arrow antenna because it is our reference antenna. In order to compute the antenna array, place the the required values in given fields. Since we ship the antennas disassembled, we can't weld them together for you. Jan 3, 2011 · I think those sold at Arrow Antennas are well worth price. Surprisingly, in VHF the IOio antenna got better outcome, but the Arrow was slightly better in UHF. NEW Amateur Ham Radio Workman UVS-300 144 / 440 MHz Dual Band Base Antenna. 2:1 Bandwidth is 4 MHz; All Elements are solid alluminium; Unity Gain 0 dBd AF - Antenna Factor. Apr 22, 2025 · Calculator allows to calculate length and other basic parameters of the various constructions of the dipole antennas taking into account dependence this parameters on wire diameter that is very important on UHF. Cavity Height in mm. The Eos supplied mounting plate height is 0. Please read here about power restrictions on channels 1-7 and more details on legal restrictions on GMRS frequencies. What Is an Arrow Momentum Calculator? An Arrow Momentum Calculator is a tool designed to compute the momentum of an arrow in flight. DISCLAIMER: Any links provided are for the reader's enjoyment. 01:1 for the 449. How to Use It This phased antenna array calculator can find the overall radiation pattern also known as the array factor of an antenna array. Below is a list of all the "Instruction Sheets" that are available. After all, the performance was reasonable, because the Arrow has 3 elements in VHF Printed Circuit Board Antenna - Specification Data Circular Polarization Calculator Antenna Measuring Notes. Aug 18, 2017 · The antenna came from GigaParts at a price of $54. e using up to 10 15% larger stacking distances then the 6WU formula suggests may be a good choice. ) Jan 29, 2025 · Note, when mounting antennas, the convention is to mount them in a clockwise direction when seen from a top-down perspective. If you’re interested in the nuts and bolts of The Arrow, keep About This Calculator. The tab on one side of the Arco 462 10-80 pF mica compression trimmer capacitor is bent up to be in line with the body of the trimmer and secured with a 6-32 nut onto the 6-32 screw that is soldered to the center pin of the SO-239 connector. This model is intended for use in transmitting and receiving for the VHF bands 144-148MHz and 430-450MHz. Whether you’re working on projects, experiments, or expanding your knowledge of antenna principles, these tools will help streamline your calculations. Brand New Coax can be Defective or Damaged. Only About 19 oz. 5 MHz. The 2 Gamma Matches (shown above) are pre-assembled & pre-tuned. To use this calculator, you need to enter the Signal Radius, which is the radius of the area that the antenna covers, and the Antenna Height, which is the height at which the antenna is placed above ground. 1. For 2 meters, the coil is 4 turns of coax at 5 inches in diameter. ) Aluminum Arrow Shafts are used for elements. Arrow Antennas – manufacturer of “fox” hunting antennas and gear 5. SHIPPING) Antenna must be end mounted. Scroll down for add to cart buttons to order on-line. (Stainless Steel and Zinc coated. 55). There is limited information about the original Bird Yagi available, but unfortunately Dick Bird is now a Silent Key. The Operating Frequency; The Dipole Length as a function of its wavelength (λ) – one of the Patch Antenna Online Calculator and Simulator. ) 2 days ago · Antenna Calculators are online tools used by amateur radio operators to design and calculate dimensions for various types of antennas. Explore the calculators below to simplify your antenna design and analysis. If mounted, maximum power is 150 watts. ) Enter Frequency Here. W6CSA Antenna Farm. This section is going to be entirely focused on the benefits of The Arrow log periodic antenna, and will keep the confusing technical talk to a minimum. But those dimensions seem to be inaccurate, as they don't match photographs of the antenna found on About SWR; My OSJ 146/440 J-Pole went through 3 hurricanes in 6 weeks, with gusts speeds, on occasion, as high as 153 MPH. IMHO: The Bird Yagi concept and design is very good. Then click the add to cart button on the left. ) (Maximum power is 500 Watts. For the very curious, the calculation we used to get this phase center and mounting plate looks like this: Mar 28, 2018 · I tested my antenna on the local N4NRV input frequencies for our two repeaters. Instructions show how to adjust for a center frequency from 50 MHz. When calculating your total antenna height, you will want to take into account three values: The Antenna Calculator aims at delivering a comprehensive and practical tool to Antenna Engineering students and practitioners. To be more specific, it is the ratio of the electric field intensity E to the voltage V induced across the antenna output terminals. Frequency in GHz. 3 MHz. This is a direct scale of our 4 Element 2 meter Yagi. Microstrip Patch Antennas (or simply patch antenna) are increasingly useful because the antenna is printed directly onto a circuit board. The more weight towards the back of the arrow the smaller the FOC. 650 MHz input frequency. 440-3 Arrow II Hand Held Portable (FREE U. 3. And plan on needing about 20 to 50 ft of coax. 5 MHz near the low end of that range and 20 MHz near the high end of that range. The antenna factor describes the connection between the electric field intensity E around the antenna and the antenna's voltage output V. For best reception sufficiently low Antenna Temperature of the stack or mostly best G/T are recommended. They add a 1/2 wave "sympathetic radiator" for 2m and a 1/4 wave stub for 440Mhz that resonate and re-radiate some of the signal present on the Jan 17, 2025 · Our dipole calculator is a simple tool that allows you to compute the length of simple antennas, particularly the very efficient half-wave dipole antennas. 50ft for the house setup. The Arrow Log Periodic Antenna, a Cellular LPDA for Any Building. Arrow Antenna L-band 3-D Printable Clip (. Using simple inputs like arrow weight and speed, it tells you Jul 20, 2009 · >>> The Arrow is an "open-sleeve" J-pole design. Arrow II Portable Antennas: M/B Mounting Bracket: 6 Meter Yagi: Instruction Sheets: 440-5S: Contact Us: Order Form- for mail-in orders. Some people were curious as to what the gain and pattern is of this antenna is. Aug 13, 2010 · [Tommy Gober] built this Yagi-Uda antenna that has some handy design features. - Custom 1/4 Wave Ground Plane. Arrow II Portable Antennas: Arrow II Satellite Antenna. If you want a very robust antenna that will handle bad weather better, weld to antenna elements at the top of the boom. The radiating element is a quarter wave (λ/4) and the radials are 12% longer. The Arrow II line of Antennas has been engineered to provide maximum gain and efficiency in the smallest practical size & weight. Local amateur radio clubs – websites and Facebook pages The Arrow II line of Antennas has been engineered to provide maximum gain and efficiency in the smallest practical size & weight. The phase center for all Arrow 100 and Arrow 100+ antennas (ANT-L1GNSS) is 0. This calculator can be used to design a Quarter Wave Ground Plane antenna, with radials. To test the Coax you will need a 50 ohm Dummy Load and an SWR Meter or Antenna Analyzer. 4. Moved Permanently. 13:1 for the 147. For hardest punch of our TX signal slight over stacking i. We are always looking for talented, passionate people who want to invest in their career with us. We’re a team of builders, designers, engineers and imaginers, all bridging the gap between what’s possible and the practical technologies we need to make it happen. 15 for the 40 meter band). It's a great Saturday antenna project especially for new hams seeking their first gain antenna. Oct 16, 2022 · Place the middle loop on that antenna and pull the radius loop back down the center line of the surface until it’s tight. In a commercial antenna, we had an antenna running at 20kw [key-down] using a 16mm tube and rod in the same configuration as shown. 1 MHz. CQ Amateur Radio magazine – regularly has fox hunting articles and ARDF info 6. Additional benefits of patch antennas is that they are easily fabricated making them cost effective. There are usually four radials, three being a minimum, but you could use up to six. A half-wave dipole antenna is comprised of two quarter-wavelength conductors placed end to end. No damage at all, and it kept right on ticking. Reply Arrow Antenna GP52 - 1/4 Wave Ground Plane (6 Metres) Key Specifications. How not to get lost in all of this knowledge? How to organize it? The The FOC is calculated as the product of the perimeter of the circular coverage area and the antenna height. We present the basic theory and rigorously validated calculators to analyze and design numerous antenna types and related components. 029 m. It was easy to assemble, the instructions & parts are clear & conciseno information is provided for antenna gain, however I assume close to 10db these beams Aug 19, 2013 · Arrow Antenna Bag – 30 inch – W Camo NAB-30G. The manufacturer's specifications 1 state a VSWR of less than 1. This calculator uses the formula L = 468/f where: L is the total length of the dipole antenna; f is the desired frequency in MHz; Each leg of the dipole is L/2 long; Note: This calculation provides a starting point. play This calculator can be used to design a Quarter Wave Ground Plane antenna, with radials. The document has moved here. 5:1 over 143-149 MHz and 430-450 MHz and has been tested to 1,000 watts. Parts Catalog (This Antenna will have a bandwidth of about 0. . I am trying to make my own arrow antenna (the split boom 2m/70cm combined model) but I hit a snag. The Spiderbeam is basically the same antenna. BTW, this antenna is 2 meter and The Antenna System has two parts. The SO239 feeds to an M8 bolt which then feeds to the gamma tube which has a PTFE insulated section inserted into its full length. So, antenna zero is the first antenna pointing towards zero degrees, antenna one is to the coordinate to the right of antenna one, and so on. (2:1 Bandwidth is over 4 MHz. Actually, the guy behind arrow antennas was the one who originally posted it on the net as a DIY project with the option to purchase from author. >> What are the pros and cons of an Arrow J-pole versus a Diamond X50A pole? > > The Diamond X50A has a somewhat higher gain than the Arrow on 2 meters > (about 2 dB higher, if I'm reading the stats SAT Antennas available in Europe, price and purchase at Passion Radio, shipped within 24h to 48h on material in stock, Portable Yagi ARROW II antenna for Satellite 146/437MHz from Arrow Antenna ARROW-146-437-10BP-1703 May 23, 2012 · 10. Antenna. Arrow Antenna basically said they weren’t posting figures as competitors use gain as a marketing ploy and inflate numbers. It is shown as a percentage. com Looking at the design of the Arrow antennas it seemed that the station could be further improved by using modern computer designed antennas to reduce local noise. to 54 MHz. or 102. Invented by Les Moxon, G6XN, the MOXON is a stealthy gain antenna that's inexpensive and fun to build. ) Mounting Hardware included. The Arrow Antenna OSJ 146/440 J-Pole is an inexpensive dual-band antenna that has been working wonders with my hand-held Yaesu FT-60R as well as my mobile Ya ARRL - Home Jun 16, 2024 · Im planning on building a Arrow antenna Array. They help hams build efficient antennas like log periodics, verticals, Yagis, and loops by providing dimensions and spacings. The coax connects to an element that is 1/4 wavelength on 2m and 3/4 wavelength on 440Mhz providing a good match and ok pattern on 2m. G (num) - Normalized Gain. The side of the boom behind the SO-239 antenna connector. The other poles aren't >>> actively fed, but make up a critical part of the antenna design. 780 MHz input frequency, and 1. STL) Arrow II 3E three-element portable hand-held Yagi antenna for 70 cm wavelength, used with Altus Metrum Products. We have updated all our solid antennas to be able to handle 500 watts! We are now offering free shipping and handling on our most popular items for all domestic orders placed on our website!! We will invoice customers for shipping for international orders. In the radius loop, mark the array center (ideally on a piece of painter’s tape). The boom is a piece of conduit with holes drilled in the appropriate places. Dilectric Constant. With a 50 foot length of RG8, and the antenna 20 feet in the air, SWR was a respectable 1. Antenna Gain, Pattern and NEC data. Then Press TAB: MHz. One connector for VHF and one for UHF. arrowantennas. Arrow proudly supports a globally diverse workforce of 22,000 people. Instruction Sheets: M/BII Mounting Bracket: Contact Us: Order Form- for mail-in orders. Enter your desired frequency (MHz) of operation (i. (Example: 95. The weighing between both much depends on the local noise level. After some research it was decided to construct a DG7YBN design X-Pol yagi antenna for the 2m band, as these have a very clean pattern and should help with noise issues in the city. Mar 10, 2018 · The Arrow antenna pictured is not a J-pole, its something else. The more weight towards the tip of the arrow the higher the FOC. Was able to hit all the repeaters in a 35-40 mile range, made several contacts that were ~25 miles simplex. Because the antenna is hand held, power should be kept to less than 10 watts maximum. What is the Antenna Array factor? The antenna array is the arrangement of multiple antennas that act like one big antenna. S. e. Enter the information below to calculate your arrow weight and FOC. May 27, 2025 · The Arrow Momentum Calculator helps measure this critical factor by combining arrow mass and velocity to assess your setup’s real-world impact power. And 20ft for the mobile setup( setting it up as im parked)… This antenna was published in The ARRL Antenna Compendium, Volume 2 in 1989 (pages 58-60). play_arrow subject 3d_rotation info settings help. Coax and connectors. For antenna 1, put the spacing loop on antenna 0 and the radius loop on the center point. Can be used with the TeleDongle or TeleBT receivers. A properly balanced arrow has an FOC of 7% to 15%. 0137 m from the bottom of the antenna. Their low profile design, often square or rectangular, allows them to be mounted to flat surfaces. Before you can test or tune the Antenna, you have to test the other half of the system first, the Coax & Connectors. The first test was made aiming the antennas at known VHF and UHF terrestrial repeaters. The Arrow OSJ 146/440 J-Pole Antenna is a vertically polarized omnidirectional antenna. The manufacturer provides quite detailed assembly instructions which even seem to contain all dimensions of all the element lengths and spacing. hwxbo sfecnc ujfy iwqy ngjnv kcooe ctfjae qabh ebyzwvy rxtuf