Ham radio coverage calculator. Create terrain profiles using digital elevation models.
Ham radio coverage calculator Best. Adjust your To use the RF Exposure Calculator, fill-in the form below with your operating power, antenna gain, and the operating frequency. 110MHz -0. Q&A. The BC VHF Plus Page, Dedicated to the Enjoyment and Exploration of Propagation on Amateur Radio Frequencies Above 50 MHZ; EME email list. That’s left many investors in the dark about whether spending money on their miner setup will have an impact on their earnings. This is a true unbalanced antenna, with a feed impedance of around 50Ω and therefore a great match to 50Ω unbalanced Welcome to Reddit's own amateur (ham) radio club. I know a few HAM radio guys whom do not know how to do this calculation properly, and I only know a few whom know how to do this calculation. Create for any Current Ham Radio Propagation Conditions Below you will find charts showing the live conditions around the Earth for radio propagation as well as atmospheric conditions that can affect Ham Radio usage depending on frequency. Two terrain databases are available here: the FCC's legacy 30-second terrain database, and the GLOBE Kenwood, Yaesu, Icom, MFJ, Yaesu, Alinco radio transceivers and receivers mods; homemade radio transceivers and receivers; homebrew HAM radio transceivers and receivers; Converters for HF, VHF; homebrew antennas yagi, It allows modeling of ham and GMRS frequencies. For a Radio Coverage study, a colored plot over a topographical map is produced. Test Different Scenarios Create Colorful Maps Answer Questions like How far is my transmitter signal going to go? How much power for my desired radius? What SignalServer is a simulation that can provide insight into geographical coverage of a transmitting system. Overall, the halo antenna is a versatile and effective option for amateur radio operators looking for a compact and efficient antenna. Have you checked your display settings, right click mouse on the Desktop and it is at the bottom of the list. 750MHz Repeater. Three search engines ( filters, geolocation and routes ) to download repeater data as a CSV file and program the RTX memories in a few clicks! An open-access tool. All topics relating to the hobby are welcome here, from purchasing and building equipment, to Ham License Plates; Radio Clubs; Links; Electronic Filing; Calculate Your Repeater System Effective Radiated Power with W1AN's Calculator: 01: Enter Transmitter Watts Output Power to the Duplexer. 0 mW/cm 2. To get maximum line of distance you need to enter the height of the antenna. VSWR = Voltage Standing Wave Ratio (n). 125 -18 0. APRS is built on Transmitter Performance Calculator - Coverage Map . Simplified Sine – Wave Oscillators T. Understanding these bands is crucial for effective communication and maximizing your ham radio experience. 5 Hz. com/M0FXBHAMRADIODIARY https://rsgb. Generating such things is EME, SETI, Radio Astronomy and Radio Amateurs. The accuracy of the data in the 48 contiguous US states is approximately 10 meters, while in Canada the accuracy is about 30 meters, and it’s about Let's see some antenna calculator and antenna design software that will help you design faster and better. Maps can be created for nearly every frequency range. A user wanting to get a calculation for range has nothing to do with their license status. Electronic Metric Prefixes 6. The APRS Design Philosophy. B. 8 support. It assumes there is nothing between the radio signals and the antenna horizon. io If you’re an amateur radio operator, you know how crucial it is to have the right tools at your disposal. 1 µH. Our maps are based on actual RF propagation, topography, and land cover data. Contact Oli MM0YOS (mm0yos@oliversturm. 5 watts. 49 MHz is 1. 200 This makes it ideal for applications where a wide coverage area is desired. com has maps of approximate repeater coverage. APRS has been developed by Bob Bruninga, callsign WB4APR. 7 SWR. However, in many cases finding out how these efforts will increase their range has been difficult. k. Yours calculated 3. Hope that helps? 73’s Steve. 5Hz. 5 -6 Ham Radio AI Art. Keep this site on-line This index page is licensed under a Creative Commons Attribution‑NonCommercial‑ShareAlike 4. RF Units Conversion 5. Operators can monitor propagation using these methods: Activity Charts: 2. 65 GHz, and 5 GHz coverage areas quickly. As we did with Loop Antenna Theory, we will them into the following types:. I have seen people use tools that give estimates of a system's performance as it relates to an antenna/transmitter/receiver specific geographic coordinate, height, and power. My first calculations were less but when I measured it I got 3. where. The K5HH Antenna Calculators are for demonstration purposes only and may not reflect actual numbers for your equipment. Basically, what you need to do is calculate what the total power consumption will be in Wh of all items that you plan to power with the system. Twice the range and/or coverage of "Long Slow", low resilience to noise: 0. This map is useful in planning and troubleshooting Welcome to Reddit's own amateur (ham) radio club. Steve: 15 March 2021 at 16:53 UTC. Home; 9M2PJU APRS Bot; 9M2PJU APRS Maps & APRS By considering these factors, you’ll guarantee your long-range ham radio meets your communication needs effectively and legally. FAQs. Radio (RF) Calculator 2. Adjusting the transmission power can significantly impact battery life. EH Antenna calculator Posted in Ham Radio Software. Database Advanced Search; Current Hot Callsigns; XML Logbook Data; QSL ListMaker; DX Spotting Network; Ham Club Database; QSL Corner; Top Web Contacts; Expired Callsigns; • My Ham Station • HF Contesting • Irish Contesting • Buy And Sell It • Ham Links • Overlay Maps • Ham Maps • APRS Maps • Flags • Ham Downloads • Guestmap Archives • My Ham Station: Here you will learn about EI8IC, a brief biography of my radio amateur 'career', and be able to see the radio equipment and aerials that I FREE DOWNLOAD, WinRFCalc is the best Windows RF calculator toolbox for EMC, RF and Radio engineers. For example, using a lower transmission power of 16 dBm instead of 20 Magnetic Loop Antenna Calculator . 01 -40 0. Please Read Description Hello! In todays video I go over how to get a coverage map using an we resource called Radio Mobile Online to help you find The Radio Coverage Tool is based on the Longley-Rice VHF/UHF “ITS” model[2], and includes a nearly 1 terabyte digitized worldwide terrain database, based on NASA Shuttle Radar Terrain Mapping data as well as other sources. If you are wondering what Amateur Radio is about, it's basically a two way radio service where licensed operators throughout the world experiment and communicate with each other on frequencies reserved for license holders. Joined Dec 19, 2002 Messages 2,158. 04: Enter Manufacturers cable loss in db per Below is a list of on-line calculators from West Mountain Radio to assist in calculating basic system information to set up your equipment. Just a quick update about new tool I created recently. 1. There are many other similar FREE VHF/UHF Coverage Mapping and Point-to-Point Analysis Tool. FOREVER, FREE OF CHARGE. A simple EH Antenna calculator that will help you in calculating turns a spacing of antenna traps . K. The calculation assumes there are no obstructions (trees, buildings, etc. Today we serve customers worldwide, including some of the biggest names in NGOs, Telecommunications, Enterprise IT and Transportation. Get Started. patreon. It is a graphical representation of MUF within a 3000-kilometer range, allowing While researching for a future Off Grid Ham article I happened across two on line propagation calculators that can determine what HF bands are best for any time or operating condition. These are great tools for HF and knowing what the conditions are if you plan on trying Skip to content. login help/register; 03:19:23 UTC 29 Dec 2024 ; Recent Callsign Lookups. Uncontrolled Environment. VOACAP is free professional high-frequency (3-30 MHz) propagation prediction software from NTIA/ITS, originally developed for Voice of America (VOA). Additional notes 3. Scientific Calculator 4. , to antennas, the points could be defined as Long / Lat coordinates + an elevation, for instance) and see if there is a line-of-sight path between those two points given (1) the curvature of the earth (2) changes in terrain. HOME; HR4NT Episodes; DIY. Robert N9NQ Fortunately, I have a Palstar AT2KD tuner (awesome piece of gear) and I can tune 20M down to 1. Installed OK, but on my PC the calculator and its text is too small and is virtually unreadable. Premium Subscriber. 10 GHz Amateur Radio; Amateur Radio Microwave – It’s easier than you think; Amateur Microwave – 3. org/main/technical/emc/emf-exposure/https://www. The first interactive map of amateur radio repeaters and beacons updated in REAL TIME. To generate an RF coverage map using Radio Mobile Online, all you need to do if follow the three easy steps below. By Mehtab September 17, 2024 September 17, 2024. 1 -10 0. kwas156 • repeaterbook. MUF 3000 Km Propagation Map, by Andrew, KC2G. Each band has unique characteristics, including propagation behavior, range, and ideal operating conditions. dlwtrunked Member. M = Signal wavelength (l) in meters. Amateurs need to complete the assessment so that if they are asked by Ofcom, they can present the calculations and demonstrate no risk to the general public. The most common material for home building small ham radio loop antennas is common copper plumbing pipe. This Line of sight simply means that there is a "radio horizon" from your antenna stretching out to the earth's horizon or other structures which normally blocks or attenuates the radio signals. If the exact antenna parameters are unknown notes at the right side can help to determine the closest values. . ofcom. I am looking (and have looked a lot) for a tool that will allow me to form a line between two points on the earth (e. last updated 30 November 2024. Users who wants to publish the result of their work must TAGS: amateur radio, Android smartphone, coverage maps, Crossband Repeaters, google earth, repeater frequencies, Repeaters 03/15/2016 In February, ARRL announced it had established an agreement with RFinder, the creator of a web and app-based directory of Amateur Radio repeaters worldwide, to be its preferred online resource of repeater Radio Mobile is dedicated to amateur radio and humanitarian use. (The satisfy many ham radio needs! A Tutorial on the Decibel Version 2. How to complete an EMF RF Line-of-Sight provides radio path information for mapping long distance SCADA radio communications by using antenna height and topography. Although commercial use is not prohibited, the author cannot be held responsible for its usage. Lowering Transmission Power: By reducing the dBm setting, I can decrease the power consumed during transmission. rf-exposure. small receiving loops, less than about 0. The calculator program available for download to design this antenna is in xls spread sheet format and requires that you have a program that will read xls spread sheet files. GitHub Repository. Where can I find repeater coverage maps? Share Sort by: Old. 110MHz Repeater . 8 µH. uk/manage-your-licence/emf Analysis: The coverage of the 146. Understanding the frequency range coverage of long-range ham Radio (RF) Calculator: Radio and RF units conversion/JavaScript applications. Links:Radio Mobile Online: https://www. 3 min read. Works either in Standard and Metric units, and let you choose on material, and loop shape, as circular, square There are many variables in this calculation. Create terrain profiles using digital elevation models. 6 by KI6GD. It's always fun to promote what's new in the hobby and the plan is to continue doing so into 2025 and beyond! Merry Christmas and Happy New Year! 73 K4HCK. This shows how to derive the answer to Fig. 495*2; Dipoe length = 0. h₁ is the transmitting antenna height above the ground,. I have, in good faith, given my best efforts to provide a calculator that will save ham operators time in setting up their antennas. \$\endgroup\$ – Magnetic Loop Calculator v. You were probably downvoted for that. DIY Ham Looking for an example of Radio Coverage Planner software w/sources to look how calculations are done (real math is somewhat hard for me). Instructions are included below for building the antenna in an example for 147. All topics relating to the hobby are welcome here, from purchasing and Resource Details You will find this resource in just one category on our links directory. 86497 / (1 + (R/0. Reflector length = 0. Home » Ham Radio Software » EH Antenna calculator. All Posts; What's New? Search. A magnetic loop antenna is a compact and efficient design used in radio frequency (RF) communication and reception. Here is my question does the 16. 001 Decibel value (dB)-30 Voltage ratio 0. Animated map . Hamradio. 0 Feet. Conversion; Finance; Health & Fitness; Maths; Physics ; Statistics; Other; Calculator Doc. It is designed for the Ham radio hobbyist, but may be useful to others as well. 620 repeater is quite well-known and generally reflects that shown on the maps The predicted coverage of the Scott's Hill repeater (and the observed coverage of an existing 2-meter repeater nearby on 145. I always have hard time calculating the offsets for repeaters so I made this tool: The Ham Intelligent Calculator, also called Hamic, is a program designed to simplify a number of calculations commonly used by Hams. The achievable RF range depends on many other factors as well. IT: let's map together Ham radio repeaters and beacons. 5 MHz and possibly supplanted by 7 MHz. ) Welcome to Reddit's own amateur (ham) radio club. 25 -12 0. 180 Hidden Peak (a. org. The key feature of a magnetic loop antenna is its ability to generate a strong magnetic field within the loop when an RF current Definitions and Formulas. Over the past few months, HNTnews has covered some simple actions that an investor can do to improve their miner’s range. Controversial. Ham Radio, Fun Facts, Open Source Software, Tech Insights, Product Reviews. An isotropic antenna is a theoretical antenna that can radiate radio waves uniformly in all directions in free space. 473* 2; Director length = 0. GO TO THE MAP The Banana Antenna Calculator allows you to input any frequency and achieve accurate measurements to achieve a precise build for all Amateur Radio HF Bands. If you’re considering getting your ham radio license or you’re trying to choose a radio service that’s right for you, the answer is simple – amateur radio, also known as ham radio – has the longest propagation prediction software for ham radio category is a curation of 32 web resources on , HF Propagation app for Windows, PalmProp, BeamFinder. Related Posts via Taxonomies. How to Use. Whether you’re a seasoned expert or just dipping your toes into the world of amateur radio, this user-friendly Calculations based on data from the official Semtech LoRa calculator. 125 -9 0. This transmission includes light emissions traveling in a straight line. 25 -6 0. Their explanations of just about everything appear to be missing pertinent information that allow the reader to connect the dots These are the two software programs I use to calculate or at least estimate likely loss in feedlines. S. Use the μV to dBm calculator to calculate the equivalent -107 dBm amplitude. Information shared over the APRS network is for example coordinates, altitude, speed, heading, text messages, alerts, announcements, bulletins and weather data. Similarly, one can specify the input impedance and find the impedance at the far end of the cable. 5μV / -113. 7 50 +5MHz PL 88. You can do this by providing your Predicting Signal Strength: HF propagation calculators estimate the signal strength and reliability of communication between two HF radio stations based on various input parameters, including Nautel has partnered with RF engineer Roger Coudé, the author of “Radio Mobile”[1] to provide simple, fast online VHF/UHF coverage mapping and point to point analysis worldwide. DMR in Australia; Three Digital Radios – The Good, The Bad and the Ugly. EXAMPLE Antenna Range Calculator: INPUTS: Pt = 20 dBm , Gt = 13 dB, Frequency = 2400 MHz, Cable_loss = 3dB, Receiver sensitivity = -80dBm OUTPUTS: Free Space Path Loss = 110 dB, Antenna Coverage Distance = 3147 meters Antenna Range Calculator Equation. Reply reply KD7TKJ • On the repeater's club's website, if they generated one. Since 2012, we’ve perfected our API for RF propagation. 0 μV. The radiating element is a quarter wave (λ/4) and the radials are 12% longer. Height (H): everything RF has created a series of RF calculators to help engineers and students with common calculations that they need to conduct frequently. Find Cable Size Find out what cable size you need depending upon the length of run, voltage at source, and current draw. my. It contains many calculators to help you design radios and antennas for all your projects. Virtual Code Practice Oscillator 7. Tools: Q code - A list of common Q codes 92 Code - A list of Please note: If you are planning to test remotely (via the internet) check with your exam administrators about the suitability of the TI-30XS for remote testing. 3 Element Yagi Antenna Calculator Formula. 001 Decibel value (dB) -60 0. L = Length (feet) of a 1/2 wave ant. All topics relating to the hobby are welcome here, from purchasing and Although this online calculator is intended to assist with designing and building homemade, ham radio loop antennas for use in the HF bands, magnetic antennas have been constructed that function in the VHF or even the UHF frequencies. Top. Stu WØSTU. In North Carolina, all official emergency radio communications are done through NC AUXCOMM. Need to know more about this update? Read the release information ERP, Line Loss and Various Calculators, Antenna Voltage and Current and Feedline Voltage and Current Ham radio repeater coverage maps . 22 Degree - 2% shorter 30 Degree - 3% shorter 37 Degree - 4% shorter 45 Degree - 5% shorter I'm planning on setting up a low-HF antenna for near to mid-range contacts. Here in this article I’ve tried to compile all information regarding Ham radio frequencies and Voice of America Coverage Analysis Program VOACAP. uk) for any queries related to EMF, RSGB EMF recommendations and regulations, or other content-related matters . 2 to 2. 170MHz Repeater. R = 6371 km is the mean Earth radius. Hamic has a simple to use, but powerful graphical interface that allows solving simple circuits such as resistors in series or parallel, or more complex circuits such as The Radio Coverage Tool is based on the Longley-Rice VHF/UHF “ITS” model[2], and includes a nearly 1 terabyte digitized worldwide terrain database, based on NASA Shuttle Radar Terrain Mapping data as well as other sources. Source: Amateur Radio Daily open_in_new. 4 SWR still exist over the 145ft of my feed line and my tuner is just masking it to my radio or did my tuner really “fix” the mis-match and an SWR of 1. 5A when Magnetic Loop Calculator v. Old. 0 is a planning tool for: - Mobile networks: 5G (NR), LTE, UMTS, GSM, GSM-R, WCDMA - Public safety land mobile networks: P25, TETRA, DMR, dPMR, NXDN - Wireless IoT LPWAN networks: LoRa, SigFox - Precision agriculture systems - Terrestrial radio and television broadcast networks: ATSC, DVB-T, DVB-T2, ISDB-T, DTMB, DAB, DAB+ - Air-to-ground This service is here for you, to help get the word out regarding all things ham radio. C4FM and WiRES-X; D-Star; DMR Repeaters c-Bridges and Networks; DMR Reflectors; FT8 and GridTracker – Digital Amateur Radio ; Microwave. v1. The other calculators I tried online were estimating from 2. Snowbird) repeater, except that Scott's has poorer coverage toward the Ham Tools - Index 1. More. Choosing Power (dBm) Settings. The above image mentions all the Repeaters Frequency Calculator. 9787 − [(11. Download EH Antenna Calculator. Similar to the situation with Radio Mobile there is no real What’s Different about Repeaters vs. Add a Comment . George good to hear you have it up and running. RF Line-of-Sight The RF Line-of-Sight tool allows users to easily drag-and-drop locations and obtain point-to-point line-of-sight information anywhere using Google Maps. (dipole), based on 95% of electrical wavelength, considering end effects. Antennas, Unit-Conversions, VSWR, RF power, DSP, EMC and much more RF related topics. a. However, . This is the minimum level required at the receiver. Other. 10. v The most powerful radio service available. Read a further explanation about this ONLINE HF propagation map. com) for application issues, or submit an issue to the This calculator can be used to design a Quarter Wave Ground Plane antenna, with radials. JavaScript must be enabled to use see the real-time graphics. Much appreciated. If a Ferrite Balun is used, the balun needs to be rated at least twice the operating wattage to prevent the balun from overheating. Open comment sort options. For example, given a type of cable and a known load impedance, tline can calculate the impedance at the input of the cable. NC Division of Emergency Management Senior External Affairs Ham radio operators use these calculations to precisely predict the effectiveness of their transmissions, adjusting power levels or antenna placement for the crispest audio-visual signals. 270) is similar to that of the 147. (requires Excel via Microsoft Office). By Oli Sturm MM0YOS, based on work by Ofcom, John Rogers M0JAV, Peter Zollman G4DSE and Ian White GM3SEK. Minimum Safe Distance. The dBm value represents the transmission power of the device. It uses data gathered by Automatic Packet Reporting System-Internet Service (APRS-IS) from packet stations in the amateur radio service. Top 10 Articles. Common Ham Radio Radio Mobile is dedicated to amateur radio and humanitarian use. Rocky AE7US: 30 December 2021 at Free tools are available from the RSGB. ×. These tools are part of the new Nautel RF Toolkit, rf coverage mapping software category is a curation of 11 web resources on , Proppy Online HF Propagation Prediction, Radio Mobile, GEOG UK terrain heights. The following Pages are dedicated to building bridges between the EME, SETI and Radio Astronomy Amateur Interest Groups. But whether you’re a pro user or a curious newcomer radio A question that comes up from time-to-time what sort of calculator can I use for my Foundation, Intermediate and Full amateur radio exam? The wording from the RSGB paperwork (Booklet EX500 2016 edition) Ham radio continues to play a significant role in this situation. The display shows worldwide activity from the last 15 minutes and is automatically updated about every minute. 1 Real-time charts like PSKReporter or FT8 activity maps display The most important thing to understand about MUF is that each possible path has its own MUF. P r = Reflected Power (%), expressed as a percentage of the incident power for a specific Home » Ham Radio Software » EH Antenna calculator. 046 kbps: 12 / 4096: 4/8: 31 kHz: 160dB: Twice the range and/or coverage of "Long Slow", high resilience to noise : The link budget used by these calculations assumes a transmit power of 17dBm and an antenna with 0dB gain. I've learned a lot from playing around with it. 3, I refer you to the RSGB book. For example, in my case I will be powering a 2-meter ham radio repeater. X. Calculator Doc. by Callsign . Universal Short Adjustable precision in coverage map calculations ; Huge databases of more than 35,000 U. 6MHz PL 88. www. Doesn't matter what year/platform/language (except asm/codes) Any help is highly appreciated! VOACAP Online for Ham Radio offers free high-frequency propagation prediction software for amateur radio enthusiasts. P r = Reflected Power (%), expressed as a percentage of the incident power for a specific Ham radio bands, also known as frequency bands, are designated segments of the radio spectrum allocated for amateur radio use. Maximum Allowed Power Density. 5Hz-ham V HF-145. Each half is about a quarter wavelength long and ends with a current node (zero current and peak voltage) at the break. 5 meters) Assume -6dBi gain handheld antenna (typical rubber-duckie) Convert Rx Hi folks! New ham here. Moon bounce reflector. Following equation or formula is used for Antenna range calculator. More information about APRS can be found at World's leading amateur radio web site with news, technical articles, discussions, practice exams and more. How to use this online map 2. New. There are others that can be used with good effect, but The APRS network is used by ham radio operators all over the world. The map shows activity from the past hour. In my particular case, ideally I would like to be able to cover a radius of approximately 1000-1200 km with good reliability, operating on 3. (Moon-Net) Over the last few decades, the G5RV antenna has become one of the most popular and widely used "all around" multi-band antennas in the world. TAGS: amateur radio, Android smartphone, coverage maps, Crossband Repeaters, google earth, repeater frequencies, Repeaters 03/15/2016 In February, ARRL announced it had established an agreement with RFinder, the creator of a web and app-based directory of Amateur Radio repeaters worldwide, to be its preferred online resource of repeater Calculate. 3)] where: R = ½ wavelength / Diameter of a conductor; 🔎 If you don't feel confident switching between wavelength, frequency, or wavenumber units, our wavelength calculator will definitely help you with the task! Dipole FM antenna length and VHF / UHF Line of Sight Calculator. 850MHz SuperLink Hub Repeater. Need a user manual? Read the new & improved VOACAP for Ham Radio User's Manual! A more VHF Propagation Map This map shows real-time radio propagation from stations operated near 144 MHz. 7925) 0. 1 Page 4 of 8 Table of Common Decibel Values Power ratio 0. 8 and 54 MHz in the amateur radio service. 145. Resources listed under RF Coverage category belongs to Software The Line of Sight calculator will determine both the "line of sight distance" and "radio horizon / service range" of an antenna placed at a specific height above the ground, represented by One of the best tools for understanding HF (high-frequency) propagation is the online map (chart) shown below. Nov 25, 2023 #5 CaptDan said: Is there a simple program I can use to IZ8WNH. This will help mitigate mismatches and stray RF due to using the antenna at frequencies other than what the antenna was specifically designed They are incredibly rugged radios and are often described as "the Swiss army knife of ham radios" and I definitely back that. Power Calculation (G5B03) The 2023-2027 General License question pool asks you to compute power usage from a voltage and a load in a DC circuit: G5B03: How many watts of electrical power are used if 400 VDC is supplied to an 800 ohm load? A. I can't find the tool/website that does this. 02: Enter Manufacturers Duplexer Loss in db. The 9M2PJU Dipole Antenna Calculator is designed to simplify the process of calculating ideal dipole antenna lengths based on frequency and velocity factor. This has not been tested on VHF (50MHz and above) banana-antenna-calculator No macros are embedded with this file. Thanks Steve. Resistor Color Codes 8. Other licensing available on request. The calculators also calculates the radio horizon. RadioLink Propagation Prediction Calculate path losses of a point-to-point radio link. Halos pick up Ham Radio Wire Antenna Calculator, wire antenna calculator, dipole & loop antenna dimensions For ALL ANTENNAS Enter operating frequency in mHz For Inverted Vee antennas ONLY, decide what is the approximate angle from horizontal. Good job on the calculator. It’s a light magnetic loop antenna calculator that run on MS Windows, and allow to calculate capacitor values and voltage based on Loop circumference, conductor diameter, desired resonant frequency and the operating power. Radio Distance Calculator. Contact. WinRFCalc version V2403 is online Windows 10, 11 & DOT-NET Framework 4. How to calculate Yagi antenna length? This map shows real-time radio propagation from stations operating on 11 bands between 1. 170MHz -0. All topics relating to the hobby are welcome here, from purchasing and An RF Engineer in Quebec (whom is also an amateur radio operator) has a website with a free online calculator that will help the knowledgeable radio user visualize an estimate of what there coverage would be based on many of the fundamental factors that affect radio coverage. ) between the antenna and the horizon and does not take into account the Antenna gain is a measure of how efficiently an antenna can radiate ham radio waves in a certain direction in reference to an isotropic antenna. Frequency Range Coverage. An analogy would be if you imagine your radio signal as a light beam reaching out to the other station's antenna, so anything in the way of your "light beam" would tend to block or shield it k — Adjustment factor, calculated with the following equation (simplified version): k = 0. Works either in Standard and Metric units, and let you choose on material, and loop shape, as circular, square Wide Band vs Narrow Band: Introduction. There are usually four radials, three being a minimum, but you could use up to six. RF prop RF propagation software. f (MHz) = Signal frequency in MHz. WSPR Signal Disturbance Theory Revives Search for Missing Flight MH370 A recent 'year end review' posting in the Amateur Radio Weekly blog, reminded me of great little piece of online software that might interest a lot of hams. The results of this range calculator also apply approximately to the conditions in the upper SW area, for example for CB radio and amateur radio operation in the 10m band. Users who wants to publish the result of their work must Radio Propagation & Diffraction Calculator This is a radio frequency propagation calculator for the transmission path between an RF transmitter and a receiver. (Using a combination of the two bands to achieve full coverage is perfectly acceptable. 01 -20 0. Coverage Maps. Note that the dimensions of h, R and d TX Output Power and RX Sensitivity need to set up based on the radio device’s actual link parameters based on the data sheet. 02Dbm-ham UHF-443. Here is a simple line of sight calculator that will do the complicated math for you to determine just how far the horizon is from your HT or your base station antenna at any height above level and To get maximum line of distance you need to enter the height of the antenna. About Us. However, ultimate responsibility for the proper use of your equipment lies with you. Everyone interested in analog electronics should find some value in this post. BNC connector on the front, SO-239 on the back, it runs all types of modes, is portable, I use it as my main VHF radio for checking in and hosting nets, I use it portable for QRP and I use it in my car with an HF Loop Antennas. Even though it is a "compromise" antenna, it has good overall performance on most hf ham bands when used with an external tuner, and allows coax as an entry feedline to the radio equipment eliminating the The Line of Sight calculator will determine both the "line of sight distance" and "radio horizon / service range" of an antenna placed at a specific height above the ground, represented by "antenna height (h)" in this equation. Yaesu FT-991 Memory Manager; EH Antenna for 80 M; WSJT-X not decoding – Solved; Frequency Filer; PC ~ Calculator Notes ~ f o = Antenna tuned frequency in MHz. 3 by Calculus, Computers are very good at Calculus, but hand calculators are not so hot and I Calculation of radio ranges in the VHF range With the program available here, the expected range of VHF radiotelephony systems can be calculated using the ground wave propagation. It is a graphical representation of MUF within a 3000-kilometer range, allowing amateur radio station operators to estimate the best frequencies and The coverage calculation are much faster than the original program, producing pixel wise images. The outputs resulting from the program are under the entire Calculate the effective radio distance with our Radio Distance Calculator to optimize your communication range based on antenna height. The map generator is the brainchild of Tom, NS6T, and can be found on his ' HAM STUFF ' website along with some other You could use the calculator to build a 75 or 80 meter dipole and then calculate an inverted vee for other bands higher in frequency, suspended under it as shown in the drawing above, from the same support and feed both with the same line to xmtr. 5 -3 0. It is characterized by a loop of wire that forms a closed circuit, often shaped like a circle or square. This will help mitigate mismatches and stray RF due to using the antenna at frequencies other than what the antenna was specifically designed Being aware of HAM radio frequencies & Bands is an essential part of your journey of becoming a successful ham radio operator. Paths are smoothed to create a color-coded footprint indicating the distance VHF signals are Ham radio, TV reception, wireless links: Operating Environment: Outdoor or indoor, depending on purpose : Construction Material: Aluminum or other conductive materials: Please note that the actual gain and other specifications may vary depending on the specific design and manufacturer of the 6-element Yagi antenna. Software/Propagation; The title of the main category is Propagation and it deals mainly with propagation prediction software for ham radio. Amateur Radio Toolkit is the best app for ham radio hobbyists. Hareendran - 12/20/24. 7 truly exists now between radio and antenna? Thanks! Welcome to Reddit's own amateur (ham) radio club. As a dedicated Ham Radio enthusiast, you understand the importance of connecting with fellow hams across the globe. For more sophisticated radio coverage analysis, there’s Radio Mobile (images taken from the Radio Mobile website): I’m not even going to try to cover the capabilities of this program, since there are a lot of them, it’s not necessarily To use the RF Exposure Calculator, fill-in the form below with your operating power, antenna gain, and the operating frequency. Antenna Calculator 3. In the dynamic realm of HF radio, a live propagation map becomes an indispensable tool for navigating the ever-changing atmospheric conditions that impact long-distance transmissions. Repeater Coverage Maps *Calculations based on a 6' receive antenna (HT height) with a threshold of 0. g. Please post a comment if you know other great . It was an overlay on a Google map showing how far the antenna's reach might be. 4 GHz, 3. Some (all?) remote testers are asking candidates to use the Windows or The balun will keep stray antenna currents off of the Feedline and help to keep stray RF out of the Radio Shack. It is used by RF engineers, ham radio operators, mobile communications engineers, and others to help In this video, we dive into the fascinating process of creating Radio Repeater Range Maps and demonstrate how to plot and calculate the range of your local A Power, Height Gain Directivity (PHG): Specifies the power, antenna height, gain, and directivity of a station, which is used to calculate radio coverage circles around stations. These radio frequency calculators help with unit conversion, attenuator design, One of the best tools for understanding HF (high-frequency) propagation is the online map (chart) shown below. Contact John M0JAV (m0jav@rsgb. It’s utterly satisfying when your message traverses vast distances, arriving as clean as if it were from next door—and these are the ham radio math formulas that make it happen. Yaesu FT-991 Memory Manager; EH Antenna for 80 M; WSJT-X not decoding – Solved; Frequency Filer; PC Values for antenna height above average terrain (commonly abbreviated "HAAT") can be calculated using this form. The repeater will be idle most of the day and I know that it draws about . e Ham Radio ~ Ham Tools This is a radio calculator script for functions and images which may not be accessible with your browser. Note that we have not used the Minimum Detectable Signal of -130 dBm in this calculation, as our interpretation from the specification is that it represents the noise floor of Ham radio activity is a reliable indicator of current HF band conditions. D. These have a broadside null and maximum The wire is #8 (3. Just learned a ton by plugging in my data. Controlled Environment. The outputs resulting from the program are under the entire The balun will keep stray antenna currents off of the Feedline and help to keep stray RF out of the Radio Shack. 0. 2mm) dia. Gain is, therefore, denoted as dBi where “dB” is the pressure level while the “i” represents the isotropic Ham Radio Frequency Calculator Ham Radio Frequency Calculator Wavelength (meters): Frequency (MHz): Calculate CALCULATION OF LOSSES: For those people who want to convert "N" into -dB by calculator or computer instead of the graph at Fig. Enter 0 if you don't have a duplexer: 03: Calculated Duplexer Power Loss in Watts. 0 International License. 850 +5MHz PL 88. For a perfect sphere without any mountains, the distance d₁ from a transmitting antenna to the horizon or the line of sight, or radio horizon, can be calculated from the Pythagorean theorem (see the picture above):. 440*2; Reflector to Dipole spacing = 0. tline makes use of gnuplot for RadioPlanner 3. Since any signal that gets from my location to somewhere more than about 2,000 miles away has to make more than one The actual math here is annoying enough that you will hardly ever want to use it (it requires knowing the incidence angle of the signal on the ionosphere, which is dependent on the height of the F-layer and the distance When calculating decibels, we use the common logarithm, written as log, with its base value of 10. Loop antennas come in various sizes and shapes, with very different characteristics. 000449) 1. The accuracy of the data in the 48 contiguous US states is approximately 10 meters, while in Canada the accuracy is about 30 meters, and it’s about See where your radio signal gets out and plot paths between radio stations with this free tool by Roger Coudé VE2DBE. 09Mhz. 1 wavelengths, where the current is approximately constant around the loop. 6MHz PL ~ Calculator Notes ~ f o = Antenna tuned frequency in MHz. This is usually called a "fan" dipole and works well when tuned for lowest SWR. World Time Clock | tline - A Transmission Line Calculator for Ham Radio. Create 900 MHz, 2. Amateur Radio Software, by Morris. Having now contrasted its calculated results with my personal radio Our simple to use system will allow you to create Tower Coverage Maps for any geographical area in the entire world. Skip to content. tline is intended to calculate various transmission line parameters. 125*2 Ham Radio, Fun Facts, Open Source Software, Tech Insights, Product Reviews . 0 The wireless coverage API . Of course, an effort has been . 1 -20 0. Click to expand Thanks for posting this. The outputs of the program are nice and can be imported to your computer ; All your studies are kept on the server; To use Radio Mobile Online the only thing required is a subscription by registration to the tool. Go to the Radio Mobile Online website and create a free account. For more information see: Radio Mobile elevation and landcover data sources; ITM model documentation The author cannot be held responsible for the quality of the predictions, the usage, or the lost of data due to a failure of the server. 443. The resource has been on our site since Wednesday Nov 11 1998, and it has been viewed 23660 times. Using the EFHW Antenna Calculator is straightforward: Input Frequency (MHz): Enter the operating frequency of your radio equipment in megahertz (MHz). It is a very nice Great Circle Map Generator, centered on your specific location. The Minimum Detectable Signal or Receiver Sensitivity at 7. your Home Ham Radio Station Determine Where Radio Coverage is Required Line-of-Site, Power Levels, and Channel Occupancy Strength of Mobile/Portable Stations Usually Limiting Factor Assume handheld radio +30dBm (1 watt) tx at a height of 1. 1. This calculator calculates the theoretical LOS and actual radio horizon (service range) of an antenna. Like the cell providers This line of sight calculator calculates how far the horizon is from an antenna placed at a particular height. 146. If you are wondering what Amateur Radio is about, it's basically a two way radio service where licensed operators throughout the world experiment and communicate with each other Coax Loss Calculator; Contests; Digital Radio. Depending on how far above ground the RF source is located, you might want to consider ground reflections — and then click "Calculate". Resources listed under Propagation prediction category belongs to Software Welcome to Reddit's own amateur (ham) radio club. This online guide should get you well started with the software. See the following KBA article for further details on RF Frequency Coverage: By calculating the antenna length accurately using the EFHW Antenna Calculator, users can ensure optimal performance across specific frequency bands. The wire was some common copper ground wire I picked up at a local hardware store. Signal-to I've just started studying for my HAM license a couple of weeks ago, so please excuse me if this is a remedial question I have the Canadian Amateur Radio Basic Qualification Study Guide (which I'm finding is terribly hard to understand). and world locations, including DXCC, NCDXF beacons, and HF broadcasting stations, to name a few ; Accepts unlimited number of user defined location databases. Online Very High Frequency /Ultra High Frequency line of sight calculator to calculate the range of electromagnetic transmission between two antennas. Database of hundreds of transmit and receive antennas, with ability to user adjustments using HFANT, Coverage; Satellite Look Angle Calculator; Online VHF UHF Coverage Maps by Roger Coudé, VE2DBE; Home; 5. luomu kbtvkerh pixt knfbikug bgqkvf simdx eeu nszg bcsd dgxyb