Ham radio coverage calculator. The APRS Design Philosophy.

Ham radio coverage calculator Since 2012, we’ve perfected our API for RF propagation. 6-Element Yagi Antenna Calculator 6-Element Yagi Antenna Calculator Frequency (MHz): Number of Elements: Ham Hints Humor Ham Radio News! Post Reviews Product Reviews Ham Radio Videos! HF & Shortwave This frequency is often used when mobile on long trips in unknown repeater coverage areas. I upgraded after checking out just 3 of the many tools it offers the Ham operator. For the 2nd station, the Radio Horizon is away. Magnetic Loop Calculator v. High Frequency (HF) propagation calculators are tools for estimating and forecasting radio wave propagation. For example, here are some popular broadcast band names as marked on one short-wave receiver:120 m, 90 m, 75 m, 60 m, 49 m, 41 m, 31 m, 25 m, 21 m, This Electromagnetic Fields (EMF) Calculator makes the following assumptions; 1. The APRS Design Philosophy. In addition to the 50% on, 50% off nature of all amateur transmissions, the calculator also accounts for Duty Cycle. The result is 3 db more than just a single antenna. Create 900 MHz, 2. Total line of sight distance = Miles Km VHF Propagation Map This map shows real-time radio propagation from stations operated near 144 MHz. Resources listed under Beam Radio (RF) Calculator: Radio and RF units conversion/JavaScript applications. Few paths between amateur radio stations offer Free Space Loss (unless both are on hilltops). 675. Our calculator will offer cooking times for each variety of ham. Varieties of Ham. Calculator Doc. 765 +5MHz PL 141. “Our systems are busy rendering Looking for an example of Radio Coverage Planner software w/sources to look how calculations are done (real math is somewhat hard for me). 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. The American Radio Relay League (ARRL) is the national association for amateur radio, connecting hams around the U. The Invigilators may provide spares but are not VHF Propagation Map This map shows real-time radio propagation from stations operated near 144 MHz. Paths are smoothed to create a color-coded footprint indicating the distance VHF signals are HAM radio Very High frequency & Ultra High frequecy bands (VHF/UHF Bands) The VHF band covers frequencies 30MHz-300MHz & the UHF band covers frequencies 300MHz-3GHz. 02Dbm-ham UHF-443. Repeater Coverage Maps *Calculations based on a 6' receive antenna (HT height) with a threshold of 0. Not to mention you can design some complicated antennas, with little effort, using the Amateur Radio Toolkit. Today we serve customers worldwide, including The American Radio Relay League (ARRL) is the national association for amateur radio, connecting hams around the U. Advertise with us; Antenna Downtilt Coverage Radius Calculator. Zolesi and Cander gives the formula for incidence angle as $\varphi_0 = \arctan Welcome to Reddit's own amateur (ham) radio club. It's an essential tool for ham radio enthusiasts interested in DX (long-distance) contacts. Dipole, vertical, quad-cube, signal mapping, resistance, resistors in series vs parallel, wire gauges, Q codes, and more, and more and more; at your finger tips. This calculator calculates the theoretical LOS and actual radio horizon (service range) of an antenna. Org HAM Radio Centralized 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) states as follows: 3. 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. This version of the calculator is an iteration of what 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. The primary difference is the type of curing process and whether the ham is either ready to eat or not. h₁ is the transmitting antenna height above the ground,. MultiCoverages. It is designed for the Ham radio hobbyist, but may be useful to others as well. Calculate Your Repeater System Effective Radiated Power with W1AN's Calculator: 01: Enter The American Radio Relay League (ARRL) is the national association for amateur radio, connecting hams around the U. 6 by KI6GD. (Using a combination of the two bands to achieve full coverage is perfectly acceptable. with shortwave coverage only, and power rated in kw. The actual gain depends on factors like design and frequency. The outputs resulting from the program are under the entire The coverage calculation are much faster than the original program, producing pixel wise images. Notes**! An example of using various "line of site to the horizon" calculators will enable you to see how additional antenna height should add to your Dipole Antenna Calculator. N. This version of the calculator is an iteration of what $\begingroup$ @BenAlabaster Some out-of-ham-world perspective: Some band names are actually not free and refer, in some parts of the world at least, to already established bands for different services. Enter 0 if you don't have a duplexer: 03: Calculated Duplexer Power Loss in Watts. I always have hard time calculating the offsets for repeaters so I made this tool: GV 2 Series Premium HD Radio-ready, high power transmitters: 3 kW to 80 kW; NV LT Series Outstanding efficiency at exceptional value, & optional HD Radio: 3. It is a graphical representation of MUF within a 3000-kilometer range, allowing FREE VHF/UHF Coverage Mapping and Point-to-Point Analysis Tool. ARRL. Paths are smoothed to create a color-coded footprint indicating the distance VHF signals are . Newsletter. Antenna Near Field Transmitter Performance Calculator - Coverage Map . The Wire Size can range from 16 AWG to 12 AWG. 443. 02: Enter Manufacturers Duplexer Loss in db. 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 This map shows real-time radio propagation from stations operating on 11 bands between 1. 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. It's ideal for the ham radio operator, shortwave listener, or other radio enthusiast. Back; 29 MHz; 50 MHz; 144-148 MHz; 222 MHz; 420 MHz; 902 MHz; 1240 MHz; Tools. org. The Radio Coverage Tool is based on the Longley-Rice When it comes to amateur radio, having a reliable and efficient antenna is crucial for achieving clear and strong signals. with news, information and resources. My only comments would be that you need to bump up the "Required Reliability" % to something North of 95% to better reflect actual coverage. uk) for any queries related to EMF, RSGB EMF recommendations and regulations, or other content-related matters . Co-phasing involves placing two (or more!) identical antennas either side-by-side or one over top another (“stacking”) at a certain distance apart (usually a 1/2 Wavelength or more) and feeding the antennas in-phase. One popular option that offers simplicity and versatility is the random wire antenna. 850MHz SuperLink Hub Repeater. e Ham Radio ~ Ham Tools This is a radio calculator script for functions and images which may not be accessible with your browser. Coax Loss Calculator; Contests; Digital Radio. S. The wireless coverage API . These tools are part of the new Nautel RF Toolkit, available free online at the website www. 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):. 5Hz -GMRS-Tulsa GMRS 462. Antenna Height of 1st Station (ASL) Antenna Height of 2nd Station (ASL) Feet Metres For the 1st station, the Radio Horizon is away. 462. 73s from 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. 4 GHz, 3. In its 6th year, WINTERHEAT is a month long simplex contest active January 1 through January 31. com) for application issues, or submit an issue to the It's ideal for the ham radio operator, shortwave listener, or other radio enthusiast. 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. But when it comes to choosing between wide band vs narrow band transmissions, the decision can leave even seasoned hams scratching their heads as each band offers unique advantages and disadvantages, and the optimal choice A daily log of Ham Radio related news stories. Define Radio Systems with predefined settings and gear to quickly create Coverage Maps. Note that the dimensions of h, R and d contoured map and a pocket calculator. The database has a resolution of 30 arseconds and was derived from SEDAC - Columbia University. Nov 25, 2023 #6 Some online coverage calculators like scadcore The obstruction zone is important in radio propagation because path loss between any two stations relates to obstruction in the First Fresnel Zone. 675 repeater has SE bias* * click here to email Definitions and Formulas. The map shows activity from the past hour. Simple RF Range Calculator is available to download from the following. Note that the dimensions of h, R and d The American Radio Relay League (ARRL) is the national association for amateur radio, connecting hams around the U. A 6-element Yagi antenna typically offers a directional gain ranging from 8 to 12 dBi. 1. ; VS Series Feature-rich rack-mount, HD Radio-ready transmitters: 300 W, Radio Mobile is dedicated to amateur radio and humanitarian use. The evaluation is made for a 3,000 km radio path for unification. Joined Dec 19, 2002 Amateur Radio $\begingroup$ @BenAlabaster Some out-of-ham-world perspective: Some band names are actually not free and refer, in some parts of the world at least, to already established bands for different services. The display shows worldwide activity from the last 15 minutes and is automatically updated about every minute. 5μV / -113. Paths are smoothed to create a color-coded footprint indicating the distance VHF signals are Definitions and Formulas. ) The FCC charges a fee to issue an initial license as well as for other FCC services. Contact Oli MM0YOS (mm0yos@oliversturm. Just a quick update about new tool I created recently. With the elimination of the morse code requirement, it's easier than ever to get your ham license. TX Output Power and RX Sensitivity need to set up based on the radio device’s actual link parameters based on the data sheet. 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. Any obstruction that impinges the First Fresnel zone causes obstruction loss or diffraction loss. SignalServer is a simulation that can provide insight into geographical coverage of a transmitting system. Reactions: JamesBrox and buddrousa. They realize the benefits and flexibility that ham radio offers. Two terrain databases are available here: the FCC's legacy 30-second terrain database, and the GLOBE One of the best tools for understanding HF (high-frequency) propagation is the online map (chart) shown below. Create for any frequency other than 88-107MHz "FM Band". See calculator at Radio Horizon Calculator . 5 kW to 40 kW; VX Series Compact, efficient, affordable 150 W to 6 kW analog FM rack-mount transmitters, 150 W and 300 W LPFM models. User-friendly interfaces designed for busy humans with options for all radio technologies from HF to SATCOM. ERP, Line Loss and Various Calculators, Antenna Voltage and Current and Feedline Voltage and Current. nd5y Member. Your product label should tell you what type of ham you have purchased. Jump to RF Exposure Calculator. This enhances the efficiency and reliability of global Is there a simple program I can use to estimate the coverage area I could/should expect from an antenna on my property. 8 and 54 MHz in the amateur radio service. Cross-platform functionality with tips and videos to help you plan your network today, not next week. If the exact 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 By Oli Sturm MM0YOS, based on work by Ofcom, John Rogers M0JAV, Peter Zollman G4DSE and Ian White GM3SEK. Resources listed under Propagation prediction category belongs to Software main collection, and get reviewed and rated by amateur radio operators. View several coverage maps in one Google Maps screen! Radio Systems. RFinder has now announced that through a new strategic alliance with CloudRF. Those databases are located on the server and represent a total of 198 GigaBytes. Co-phasing or “stacking” has long been a way to get high gain from antennas. JavaScript must be enabled to use see the real-time graphics. CT Spectrum Management Association Connecticut's Amateur Radio Operator's frequency coordination group. To find the range, enter the heights of both the Transmit and Receive 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. Note that buildings and other obstructions is not For the 1st station, the Radio Horizon is away. APRS is built on These radio frequency calculators help with unit conversion, attenuator design, antenna design, radars, and various other basic calculators. Radio Propagation & Diffraction Calculator, W6ELProp, PropView, HamCAP; It uses a probabilistic approach to estimate radio coverage with algorithms that are supposed to be more accurate than other similar programs. The total line of sight distance is Miles Km. . 65 GHz, and 5 GHz coverage areas quickly. Each repeater has its own potential coverage map, which can be activated on request and superimposed on the map Amateur Radio operator since 1981, educated to Ham radio tools, bearings and distances calculators category is a curation of 12 web resources on , NS6T's Azimuthal Map, DXCC List with your beam headings, IOTA Bearing & Distance list for your QTH. For example, here are some popular broadcast band names as marked on one short-wave receiver:120 m, 90 m, 75 m, 60 m, 49 m, 41 m, 31 m, 25 m, 21 m, Calculate the effective radio distance with our Radio Distance Calculator to optimize your communication range based on antenna height. I'm planning on setting up a low-HF antenna for near to mid-range contacts. The larger the wire, the wider the bandwidth. DMR in Australia; Three Digital Radios – The Good, The Bad and the Ugly. It uses data gathered by Automatic Packet Reporting System-Internet Service (APRS-IS) from packet stations in the amateur radio service. Additional notes 3. Animated map. it Mercatino Calculate the maximum allowed power density and minimum safe distance in both controlled and uncontrolled environments. 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 The Radio Horizon Calculator is used to find the the maximum horizon distance that a radio frequency (RF) signal can travel without interference from obstacles [1]. 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. 1st station radio horizon is = away. It is a graphical representation of MUF within a 3000-kilometer range, allowing amateur radio station operators to estimate the best frequencies and Radio Mobile is dedicated to amateur radio and humanitarian use. This type of antenna is easy to VHF Propagation Map This map shows real-time radio propagation from stations operated near 144 MHz. 2. Antenna Projects 0; RadioAnnunci. The project "Understanding HF Propagation" provides a detailed overview and tutorials on HF propagation. To use the RF Exposure Calculator, fill-in the form below with your operating power, antenna gain, and the operating frequency. The outputs resulting from the program are under the entire responsibility of the user, and the user should conform to restrictions from external data sources. The measurements below are for building a simple Dipole Antenna. Hevener. (requires Excel via Microsoft Office). The calculators also calculates the radio horizon. Amateur radio operators, military communications, and organizations that rely on This free online tool takes antenna height and the topographical formations of the earth to calculate the line-of-sight of a radio path. WINTERHEAT Simplex Contest Runs Through January December 23, 2024. Skip to content. 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 range, most power, and most flexibility of any radio service that is available to the general public, once you get a license. 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. This line of sight calculator calculates how far the horizon is from an antenna placed at a particular height. Hamic has a simple to use, but powerful graphical interface that allows solving simple circuits such as resistors in series or 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. Read more about Real-time MUF Map. com My page on QRZ. The digital terrain information comprises two databases: elevation and land cover. 500MHz. By offering a visual snapshot of the current ionospheric conditions, these maps empower users to make informed decisions about optimal frequency selection and propagation paths. com. 10 GHz Amateur Radio; Amateur Radio Microwave – It’s easier than you think RF Line-of-Sight provides radio path information for mapping long distance SCADA radio communications by using antenna height and topography. Regularly calculating radio distance helps in maintaining efficient and 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 between the stations taking into account the curvature of the Earth). The event encourages hams to get on the air and accumulate as many VHF/UHF simplex contacts as possible. This transmission includes light emissions traveling in a straight line. com 0; Long Delayed Echoes 0; My Content. propagation prediction software for ham radio category is a curation of 32 web resources on , BeamFinder, HF Propagation app for Windows, PalmProp. (or less) due to reflection, refraction, and atmospheric conditions. 1. All transmissions are at most 50% on and 50% off, such as having a QSO. 04: Enter Manufacturers cable loss in db per 100 feet. Exam sessions are conducted by volunteers working under the direction of the FCC and a Volunteer Exam Coordinator (VEC). 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. Conversion; you can optimize your communication systems for better coverage and signal clarity. Potential Coverage Map of the Repeater by RadioMobile. The quality of that database varies from one country to another. How to use this real-time map 2. 2nd station radio horizon is = away. Home; Meeting Minutes; Coordination Guidelines; Band plans. These are great tools for HF and knowing what the conditions are if you plan on trying Co-Phasing. , to antennas, the points could be defined as Long / Lat coordinates + an elevation, for instance) VOACAP Online for Ham Radio offers free high-frequency propagation prediction software for amateur radio enthusiasts. 850 +5MHz PL 88. 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 VOACAP (Voice of America Coverage Analysis Program) is a radio propagation model that uses empirical data to predict the point-to-point path loss and coverage of a given transceiver if given as inputs: two antennas (configuration and position), solar weather, and time/date. 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. K9SE E-Layer Propagation Assessment Radio Propagation & Diffraction Calculator This is a radio frequency propagation calculator for the transmission path between an RF transmitter and a receiver. [Return to JavaScript Collection | Return to Homepage | Return to Amateur Radio Page] Calculate Your Repeater System Effective Radiated Power with W1AN's Calculator: 01: Enter Transmitter Watts Output Power to the Duplexer. 1 Silent, battery powered, non-programmable calculators are permitted. com, users will now have coverage maps for all repeaters on earth. nautel. It is used by RF engineers, ham radio operators, mobile communications engineers, and others to help Radio Mobile is one of the best available online coverage calculators available - especially when you consider that it's Free to use (for amateurs). If you are into computers you should be able to translate it into simple programs and save the "brain strain". The FCC fee must be paid directly to the FCC not to an organization or exam team. Following equation or formula is used for Antenna range calculator. This article has been published in a much abbreviated "serial" form in the Summerland Amateur Radio Club Newsletter over the last year and it is requested This tool is invaluable for amateur radio operators, emergency responders, and professionals relying on HF bands for communication. Although commercial use is not prohibited, the author cannot be held responsible for its usage. To get maximum line of distance you need to enter the height of the antenna. If you are wondering what Amateur Radio is about, it's basically Population covered When performing a radio coverage study, the program access a population density database to determine the total population covered for both levels of signal. It provides increased signal strength and directionality for improved long-range communication. CB radio is dying out to a large extent, while ham radio is alive and well. 3 Hz *calculation based on an omnidirectional antenna, 462. This map is useful in planning and 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 The most powerful radio service available. ARI Italian Amateur Radio Society 0; ARI Firenze ARI – Sezione di Firenze 0; ARRL Amateur Radio Relay League 0; DX Zone Ham Radio Internet Guide 0; DXSummit 0; DXWatch 0; eHam 0; Ham Radio Daily Ham Radio News 0; IW5EDI on QRZ. The minutes to cook per pound depends on the type of ham being cooked. Joined Dec 19, 2002 Messages 11,380 Location Wichita Falls, TX. It was designed for amateur radio operators. Values for antenna height above average terrain (commonly abbreviated "HAAT") can be calculated using this form. C4FM and WiRES-X; D-Star; DMR Repeaters c-Bridges and Networks; DMR Reflectors; FT8 and GridTracker – Digital Amateur Radio; Microwave. The above image mentions all the Repeaters Frequency Calculator. (Radio coverage). Works either in Standard and Metric units, and let you choose on material, and loop shape, as circular, square It allows modeling of ham and GMRS frequencies. The world of Ham radio (Amateur radio) is a very vibrant and it’s woven with variables voices, data, and much more experiments. g. Online Technical and HAM Radio Related Calculators. DXMAPS doesn't make use the VOACAP on-line scripts, but it runs its own calculations using the Online Very High Frequency /Ultra High Frequency line of sight calculator to calculate the range of electromagnetic transmission between two antennas. View the fee filing guide and instructions on the FCC Application Fee webpage. Dipole Antenna Calculator. Contact John M0JAV (m0jav@rsgb. 6 Meters Hi folks! New ham here. The Ham Intelligent Calculator, also called Hamic, is a program designed to simplify a number of calculations commonly used by Hams. 5 MHz and possibly supplanted by 7 MHz. This has not been tested on VHF (50MHz and above) banana-antenna-calculator No macros are embedded with this file. R = 6371 km is the mean Earth radius. where. Welcome to Reddit's own amateur (ham) radio club. Here it is set up in the garden for testing on 145. Even though it is a "compromise" antenna, it has good overall performance on the author of “Radio Mobile”[1] to provide simple, fast online VHF/UHF coverage mapping and point to point analysis worldwide. It assumes there is nothing between the radio signals and the antenna horizon. 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. And, the impedance and reactance are perfect! Below is a quarter wave ground plane antenna I made for 23cm, 1296MHz which is made from off-cuts of household mains copper Most of the truckers in the country are getting ham radio licenses. 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. vdbnxf nuux qgkwvruy fwg pooa udxpofii hut ysxk ymopj gqobwt