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Accessing real-time public safety and amateur radio communications often requires specialized scanning equipment or a local presence. Broadcastify addresses this by offering a web-based platform that streams live audio feeds directly to listeners, enabling remote monitoring of various radio systems. This particular page aggregates twelve distinct audio streams covering the Las Vegas-Henderson metropolitan area, providing a centralized point for monitoring local emergency services and ham radio activity. The available feeds include public safety channels for entities like Boulder City Fire, Henderson Fire Dispatch, and Nevada Highway Patrol in Clark County. Additionally, several amateur radio repeaters are streamed, such as the _DMR NX7R 449.62500_ MHz repeater, the _Dstar 449.575 W7AES_ machine, and repeaters associated with the _Sin City Repeater Group_ and _W7HEN Henderson ARC_. These amateur radio streams offer insights into local ham operations, club activities, and emergency communication drills. While the primary Las Vegas Metro Police Department feed is noted as offline due to encryption, the platform continues to provide a diverse selection of other local public safety and amateur radio transmissions. This allows enthusiasts and emergency communicators to stay informed about regional events and ham radio nets without needing a physical scanner.

HamScope v1.56, released on 2007-03-20, functions as a multi-mode communications interface for amateur radio, supporting digital modes such as PSK31 (BPSK and QPSK), RTTY, ASCII, MFSK16, PACKET, and CW. The software integrates with external engines like _MMTTY_ for RTTY/ASCII and AGWPE for PACKET operation. It features a panoramic waterfall display, 42 user-programmable macro buttons, and user-definable function key mappings, providing operators with enhanced control during digital mode operations. The program includes a radio control interface compatible with several ICOM, TenTec, Kenwood, and Yaesu transceivers, enabling direct rig control. HamScope also establishes data links with various logging and radio control applications, including LOGic 7/8, DXbase 2004, RYLogit, and TRX-Manager, facilitating seamless data exchange and logging. A DDE server is available for custom connections. Designed for Windows 98 and NT, HamScope requires a 133 MHz Pentium-class machine and 16-bit SVGA color. While not officially supported, users have reported functionality on Windows 95, ME, XP, and 2000, though some issues with window settings or the MMTTY engine may occur. The software is distributed as a single executable file, with separate downloads required for MMTTY and AGWPE engines.

Ever wondered what goes on behind the scenes of the Chicago Police Department? Listen to Chicago police live audio feed from different district zones. Broadcastify offers a free stream of live Chicago PD radio transmissions! Stay informed about real-time incidents and hear police communication firsthand. This official feed allows you to experience the fast-paced world of Chicago law enforcement, directly from your browser. Be aware that some broadcasts may be delayed or encrypted for privacy reasons.

DX Summit, operated by the OH9W OH2AQ Radio Club, functions as a full-featured web-based DX cluster, aggregating real-time and historical DX spots across the amateur radio spectrum from 1.8 MHz through 47 GHz. This utility includes specialized categories such as beacons, digital modes, IOTA, QRP, and satellite operations, making it a critical tool for monitoring current propagation conditions and identifying active DX stations. The platform also offers a spot search function to research past activity of specific call signs and integrates direct links to VOACAP predictions, QRZ.com, and ClubLog. Maintained by OH8X, DX Summit's long operational history underscores its reliability for DXers and contesters seeking current amateur radio spots. While it provides daily DX news, the content may not always be up-to-date, and access can be overloaded during major contest events. A comprehensive tutorial is available to guide users through its features, enhancing its practical application for identifying rare DX or unidentified signals.

A 2 meter (146 Mhz) J-Pole antenna that is inexpensive, and easy to build.

The article details the construction of a basic long-wire antenna, referencing its use with a Realistic stereo receiver for AM reception and noting its availability as a RadioShack kit (catalog # 278-758) in their 2000 catalog. It emphasizes proper orientation for optimal signal reception, stating the antenna performs best at right angles to the desired signal direction and worst end-on. Specific components mentioned include bare copper wire, nylon rope, insulators, and eye-hooks, with a recommendation to solder connections for best results. Key construction advice includes securing the wire between two points, such as a house corner and a tree, while ensuring the airspace is clear of obstructions, particularly power lines. A practical tip for tree mounting involves using a pulley and a counterweight, like a brick, to maintain wire tension despite tree sway, a technique commonly employed by **Ham Radio operators**. Grounding instructions specify connecting the radio's ground terminal to a copper cold-water pipe or a dedicated copper ground rod. Safety notes are prominently featured, advising extreme caution around power lines, proper ladder usage, and ensuring the antenna is high enough to prevent accidental contact by people or pets. The document also recommends **lightning protection** measures, such as disconnecting and grounding the antenna when not in use, suggesting devices from C. Crane Company or RadioShack, or a simple knife switch for manual grounding.

Able to cover all frequencies between 3.5 and about 10 MHz, the loop described here is directional, does not require a radial system, and stands just 1.8 metres tall. The antenna can be put together in a short time and is cheap by Peter Parker VK3YE ex VK1PK

MMTTY V1.70K, released June 4, 2017, provides a full 3.5MB installation for RTTY operations on Windows platforms including XP, Vista, and Win7. The software, developed by JE3HHT, utilizes a soundcard for RTTY decoding and encoding, with support for external FSK keying via parallel or serial ports, including USB serial adapters. An MMTTY Engine V1.70K is also available, specifically designed for integration into other commercial amateur radio programs requiring RTTY functionality. Older versions such as MMTTY V1.68A (September 29, 2010) and MMTTY V1.66G are accessible, alongside a non-installer version (MMTTY168A-i.zip) for experienced users. The resource includes an updated ARRL.DX file for callsign lookup and offers a comprehensive 18MB PDF help file for offline viewing or download. Support for the software is directed to a group.io community. MMTTY integrates with **COMFSK** and **EXTFSK/EXTFSK64** for precise FSK keying, enabling direct radio control. The site also hosts MMJARTS V1.03, a 254KB utility released September 6, 2002, which generates log and summary sheets specifically for the JARTS RTTY contest, linking to the official JARTS website for contest information.

Building a 2.4GHz vertical collinear omnidirectional antenna

The online interface presents a **Drake R8** communications receiver, allowing users to remotely tune frequencies, select modes, and adjust key settings via a web browser. It features a graphical representation of the receiver's front panel, including a rotatable main tuning knob, offering an interactive experience for shortwave listening. The system has been operational since 1995, providing continuous access to the receiver's capabilities. Users can listen to various shortwave broadcasts and amateur radio communications across the HF spectrum. The interface supports real-time frequency changes and mode selections, such as AM, SSB, and CW, directly impacting the physical receiver's operation. This setup enables remote exploration of radio signals without requiring personal equipment. The resource functions as a live **Web-controlled Shortwave Radio**, making the Drake R8 accessible globally. It serves as a practical demonstration of remote radio operation, facilitating both casual listening and more focused signal analysis for those interested in HF propagation and radio reception.

This antenna is fed for vertical polarisation, to give a low angle of radiation for DX and also a nearly omni-directional radiation pattern.

Logger32 is a well-established amateur radio logging program designed primarily for DXers who require a flexible and data-driven logging environment. The software maintains a comprehensive logbook database capable of handling large volumes of QSOs while offering detailed tracking of DXCC entities, awards, and band/mode statistics. One of the core strengths of Logger32 is its DX cluster integration. The program connects to telnet DX clusters and displays spots in real time, with filtering options by band, mode, country, or callsign. The cluster window can automatically highlight needed DXCC entities, band-fills, or new modes based on the operator’s log. Logger32 also provides rig control through CAT interfaces, supporting a wide range of transceivers via serial or USB connections. When properly configured, frequency and mode are automatically captured in the log entry window. The software supports digital mode integration through external applications and can exchange information using standard interfaces. Another important feature is its award tracking system, including DXCC, WAS, IOTA and other common amateur radio awards. The program calculates worked, confirmed, and needed entities with detailed reports. Logger32 supports ADIF import and export, allowing interoperability with other logging systems. It also includes QSL management, with tracking for bureau, direct, and electronic confirmations such as LoTW or eQSL when configured. Overall, Logger32 remains a technically capable logging solution focused on DX tracking, cluster awareness, and detailed statistical analysis of operating activity.

Offers a direct portal to real-time public safety communications, specifically focusing on the **NYPD Citywide 1** radio channel. This resource enables monitoring of law enforcement and emergency services traffic, providing insight into ongoing incidents and operational procedures. It functions as a web-based scanner, delivering live audio feeds directly to the user's device, bypassing the need for dedicated scanning hardware. Listeners gain immediate access to dispatch and field unit transmissions, which can be valuable for understanding local emergency responses. While the free version includes initial advertisements, an upgrade to premium service removes ads and offers additional features like feed archives and **alpha tags**, enhancing the listening experience and providing historical context to the live broadcasts.

The page provides detailed plans and pictures of 80m and 160m antennas for both transmission and reception, emphasizing the importance of antenna farm on low bands. It discusses the differences between TX and RX antennas, the significance of signal-to-noise ratio, and the benefits of directional antennae. The author shares personal experiences and recommendations for successful operation on low bands.

CW Decoder provides a robust solution for amateur radio operators aiming to decode Morse code directly on their computer. The software processes incoming audio, presenting the decoded CW as text on the screen, which can be particularly useful during crowded band conditions or for those refining their copying skills. Additionally, it offers the capability to generate a sidetone, allowing operators to monitor the decoded audio in real-time. The application features a **spectrum display** of the audio input, complete with a sliding cursor. This visual aid enables precise selection of a specific audio frequency for decoding, helping to isolate desired signals from QRM. My field experience with similar decoders confirms that a clear visual representation of the signal greatly improves decoding accuracy, especially when dealing with weak signals or multiple stations. Beyond decoding, the program integrates a **keying function**, allowing users to transmit CW directly from their keyboard. This feature supports full CW break-in operation, which is essential for efficient contesting and DXing, providing immediate switching between transmit and receive modes without manual intervention.

Sixty-four years of operating experience inform Glynn E. "Buck" Rogers Sr., K4ABT's, insights into the J-Pole antenna, which he describes as a direct descendant of the _Windom_ or _ZEPP_. His first article on the J-Pole appeared in HRC magazine in 1958, and he has since published numerous pieces in publications like CQ Magazine, consistently referring to the J-Pole as a Windom with a folded-back short section forming the parasitic element. He emphasizes that both the Windom and J-Pole are powerful multi-band antennas, performing exceptionally well at harmonics of their fundamental design frequency, and advocates for 50-ohm coaxial cable with a _BALUN_ at the feed-point to avoid RF energy losses. K4ABT details the J-Pole's features, noting its ease of erection, lack of radials, low angle radiation, greater bandwidth, and immunity to terrestrial noise. He highlights its suitability for local nets and distant repeaters, claiming more gain and durability than most ground planes, and its ability to meet stealth antenna requirements. The guide provides specific dimensions for 2-meter (145.000 to 146.000 MHz) and 6-meter (50.500 to 51.500 MHz) J-Pole antennas, including measurements for the long driven element, short tuning stub, and spacing. The construction section illustrates a modified feed technique using an SO-239 chassis-mount coax connector soldered into a copper tee, deviating from the usual hose clamp method. The author also discusses the use of _EMT_ (electrical metallic thin-wall conduit) as an alternative to copper in earlier days. He cautions against building a 75-meter J-Pole due to its impractical length, reinforcing the antenna's optimal application for VHF and UHF bands.

Demonstrates the construction of **magnetic loop antennas**, detailing both multi-turn and single-turn designs. It covers a 30-inch diameter multi-turn loop for 80 meters, based on a February 1996 QST article, and an octagon single-turn loop made from 15mm copper tube with a 4.8-meter circumference, operating from 7 MHz to 14 MHz. The document also presents a smaller 800mm diameter loop for 14 MHz to 28 MHz, emphasizing the importance of high-voltage tuning capacitors. Covers the design and construction of custom **butterfly capacitors** and piston capacitors, including a split stator capacitor with 140 pF capacitance and a 6000 Volt rating, and a butterfly capacitor with 5-65 pF and 7200 Volt rating. It explains why butterfly capacitors are preferred over split stator types for high power applications due to lower losses and direct series connection of rotors, reducing resistive losses from wiper contacts. Material recommendations include clear PVC for plates and brass or stainless steel for non-magnetic hardware. Addresses practical considerations such as feeding the loop with a shielded 1/5 Faraday loop made from RG213 or RG8 coax, achieving VSWR 1.1 across bands, and optimizing its placement 180° from the capacitor. It also discusses mechanical joint resistance, dissimilar metal oxidation prevention using Vaseline, and a simple method for determining radiation angle with a TL-light tube. The guide includes diagrams for rotor, stator, and end plate construction.

Presents the official online presence for Yaesu, a prominent manufacturer of radio communication equipment. The site details their extensive product lines, encompassing amateur radio transceivers, antenna rotators, tuners, amplifiers, and various accessories like microphones, speakers, and power supplies. It functions as a central hub for product information, specifications, and support resources. The resource categorizes its offerings across several key areas, including **Digital Mobile Radio (DMR)** solutions, HF/VHF/UHF transceivers, and specialized receivers and scanners. Each product section typically includes model numbers, feature highlights, and often links to manuals or technical documentation, providing hams with essential data for equipment selection and operation. Beyond amateur radio, the site also covers Yaesu's contributions to aviation and marine radio sectors, illustrating the company's broader scope in wireless communication technology. It serves as a direct portal for accessing manufacturer-provided details, ensuring accuracy and currency for those researching Yaesu gear.

The **Extended Double Zepp** (EDZ) antenna, a simple wire design, is presented as a means to achieve 3-4 dB of gain on 10 meters, with an overall length of just 43 feet. This resource, authored by WB3HUZ, details several gain antennas suitable for the 29 MHz AM segment, all modeled using EZNEC software at 30 feet above ground. Other designs include a compact rectangular loop, offering more gain than the EDZ and a lower take-off angle, and the **Lazy H**, a bidirectional antenna providing 6 dB gain, which is also workable on 20, 17, 15, and 12 meters. The Bisquare, a diamond-shaped open-top loop, is also featured, providing approximately 4 dB gain and requiring only a single support. These designs are primarily fed with ladder line or open-wire line to simplify matching, though a coax feed option for the EDZ is shown for 10-meter-only operation. The Lazy H, for instance, requires about 16 feet of open-wire line for its half-wavelength elements spaced a half-wavelength apart. An enhanced EDZ Lazy H variant is also discussed, achieving an additional 1-2 dB gain by extending element length to 1.28 wavelengths and increasing spacing to 0.64-0.75 wavelengths. The Bisquare, while primarily a 10-meter antenna, can be adapted for 20 meters by closing the top connection.

The 144-430 portable j-pole antenna is designed for amateur radio operators seeking a lightweight and efficient solution for VHF and UHF communications. This antenna is particularly useful for portable operations, allowing hams to set up quickly in various locations while maintaining excellent performance. Constructed from readily available materials, it can be easily homebrewed, making it an ideal project for both beginners and experienced operators alike. The j-pole design offers a simple yet effective configuration that provides a good match across the 144 MHz and 430 MHz bands. Its vertical polarization and omnidirectional radiation pattern make it suitable for local communications and simplex operations. This antenna can be deployed in various environments, whether in the field or at home, and is well-suited for mobile applications. With proper construction techniques, operators can achieve optimal performance, enhancing their ability to make contacts during contests or casual QSOs.

The JACK Audio Connection Kit provides a robust, cross-platform solution for routing audio and MIDI data between various software applications with minimal latency. It addresses the common challenge of directing the output of one program, such as a digital mode decoder or SDR application, into the input of another, like a logging program or audio recorder. Jack audio is a multi platform application, runs on Linux, Windows and MacOS. This virtual audio cable functionality allows for complex signal flows, enabling users to simultaneously send audio from a single source to multiple destinations and even loop it back for recording or further processing within the same or different applications. For amateur radio operators, JACK facilitates advanced configurations for digital modes, contesting, and signal analysis. It supports intricate setups where a single radio's audio output can feed multiple decoders, spectrum analyzers, or recording utilities concurrently. The API is designed for real-time performance, crucial for applications requiring precise timing and minimal delay in audio processing.

Presents the WA7BNM Contest Calendar, a long-standing resource for amateur radio operators seeking contest schedules and rules. Bruce Horn, WA7BNM, compiles comprehensive listings that include an _8-Day Calendar_ for immediate planning, a _5-Week Calendar_ for near-term strategy, and a _12-Month Calendar_ for broader outlooks. The site also offers specialized views like the Perpetual Calendar for predictable events and a dedicated section for State QSO Parties. Operators can access historical data back to **2005** and customize their calendar views to filter for specific modes or QRP power levels. The calendar integrates with modern tools, providing RSS feeds, iCal downloads for desktop calendars, and direct links to Google Calendar for seamless integration. This resource is a staple for contesters, offering essential details like log due dates and links to official contest sponsor rules.

For radio amateurs considering homebrew antenna projects, this resource details several designs from WE6W, an experienced operator. It covers the construction and characteristics of a _160 Meter QRP Loop Antenna_ optimized for high voltage, along with standard and folded variations of the double bazooka antenna. The site also presents a unique Field Day antenna design and instructions for building a Sterba Curtain, a directional array known for its gain. Each design includes practical insights from the author's building experience. The author provides comparative data, such as the performance of a standard bazooka against a traditional dipole, offering real-world context for antenna selection. The Sterba Curtain section includes notes on its beamwidth and gain, crucial parameters for directional operation. These designs are suitable for hams looking to experiment with cost-effective, high-performance antennas for various bands and operating scenarios, from QRP on 160m to directional DXing with a Sterba Curtain, which can offer significant forward gain, often exceeding **10 dB**.

Need a general purpose antenna on the magic band? The J-Pole is an easy-to-build and inexpensive device that provides an omni-directional vertically polarised antenna without the need for a ground plane. In technical terms, it is an end fed vertical 1/2 wave which is fed via a 1/4 wave matching stub.

Freeware Windows QSL card printer software. This tool will let you create you own QSL cards importing pictures and customizing colors and other cards aspects. Print directly to your ink-ject or laser printer. Runs on windows systems by wb8rcr

This resource presents the _FCC_ Online Table of Frequency Allocations, codified under 47 C.F.R. § 2.106. The document details frequency assignments across the electromagnetic spectrum, from 0 kHz to beyond 2170 MHz, specifying allocations for various radio services including amateur, maritime mobile, aeronautical radionavigation, and broadcasting. The table is structured with columns for International Table (ITU Radio Regulations Article 5, Section IV, 2019 Edition), United States Table (Federal and Non-Federal), and corresponding _FCC_ Rule Part(s). Specific frequency ranges, such as **135.7-137.8 kHz** and **472-479 kHz**, are identified with their primary and secondary allocations, including Amateur Radio (Part 97) and Maritime Mobile (Part 80). The methodology involves direct publication of regulatory data, reflecting amendments adopted by the _FCC_ that may not yet be codified in the Code of Federal Regulations. Each entry provides the allocated service (e.g., METEOROLOGICAL AIDS, RADIONAVIGATION), relevant footnotes (e.g., 5.53, US18), and the applicable _FCC_ Rule Part. For example, the 1800-2000 kHz range is allocated to AMATEUR radio under Part 97, alongside MOBILE services. Contact information for the Office of Engineering and Technology Policy and Rules Division is provided for inquiries regarding the data. DXZone Focus: Regulatory Database | FCC Publication | Frequency Allocation | Rule Part Reference

QRZ.com provides a comprehensive online **callbook** service, enabling amateur radio operators to look up detailed information for over 2 million licensed stations worldwide. Each entry typically includes the licensee's name, address, QSL route, and often a personal biography with station details, antenna configurations, and operating interests. The platform integrates various features such as a **Logbook of the World (LoTW)** interface, allowing users to confirm QSOs directly, and a robust search engine for rapid call sign resolution. The resource also features dynamic content, including real-time solar-terrestrial data from N0NBH, an active online swapmeet for buying and selling amateur radio gear, and a news section with articles covering current events, contest results, and special event station announcements. Recent news items highlight topics like the 'Five Two Simplex Challenge' and the '9th HamSCI Workshop,' indicating a focus on active operating and scientific engagement within the amateur community. Furthermore, QRZ.com supports various amateur radio awards, such as the new 'USA250 Award,' encouraging participation in specific operating programs.

SysLabs RadioControl is a software platform for radio device control and application development. It operates on _Windows_ versions from Windows 95 and Windows NT 4.0 through _Windows 11_. The software is available in Lite, Standard, and Professional editions, each including Frontpanel for direct radio control, a Frequency Database for management, and a Memory File for channel operations. Features include frequency identification, memory scanning, and graphical spectrum views with bitmap export capability. The Professional Edition supports multi-device control and utilizes radio device-internal scanners, achieving scan rates of **40-60 steps per second** compared to the RadioControl-internal scanner's **10-20 steps per second**. Supported devices for internal scanning include AOR AR-5000, AR-8200, AR-8600, AR-ONE, R&S EB200, and various Icom receivers and transceivers. RadioControl supports older devices such as ICOM IC-R71, IC-R7000, IC-706, IC-735, YAESU FRG-8800, and FRG-9600, extending their control capabilities. The platform offers APIs for integration and supports import/export with formats from VisualRadio, SCANcontrol, shoc Radio Manager, WiNRADiO, AOR ACEPAC-3A, as well as generic Text, CSV, and HTML. DXZone Focus: Radio Control | Windows | Frequency Management | API

The page provides a tool to create a customized Ham Radio Az Map on the fly, with various dimensions available. It is a valuable resource for amateur radio operators to visualize and optimize pointing of directional antennas. The content includes maps for different regions, prefix maps, and world maps.

The J-Pole antenna is an omnidirectional antenna that can be used for base, mobile and field day stations. It does not need a ground plane, radials or a complicated matching system. The J-Pole can be cheaply, simply and quickly constructed using a variety of techniques, some of which are discussed in this article.

Over 200 Telnet DX cluster entries are meticulously cataloged, each providing the cluster's callsign, IP address or hostname, and the specific port for connection. The resource details the geographic location for each cluster, often including grid square information or city/country, which is crucial for operators seeking regional or local spotting networks. For instance, **AB5K** offers both worldwide and USA/Canada-only spot feeds, while **K2LS** explicitly limits spots to USA/Canada/Caribbean Zones 1-8, excluding chat messages. The compilation serves as a practical reference for amateur radio operators who utilize traditional Telnet clients for real-time DX spotting. It presents a raw, unadorned list, prioritizing direct access information over elaborate interfaces. This format allows for quick integration into logging software or terminal programs that support Telnet connections. Distinctively, the resource focuses exclusively on Telnet access, differentiating it from web-based or aggregated cluster services. The sheer volume of listed clusters, spanning continents from Europe and North America to Asia and Oceania, makes it a robust tool for DXers and contesters aiming to monitor propagation and identify rare DX stations across various bands.

The Broadcastify platform hosts a live audio feed for the Baltimore City Police scanner, enabling real-time monitoring of law enforcement and emergency communications. This specific feed, identified as feed/16007/web, streams public safety radio transmissions directly over the internet. The service aggregates thousands of such feeds globally, with 7,299 live audio feeds available, including 6,966 within the United States, covering various states and jurisdictions. Users can access these feeds via a web interface, allowing for passive listening to local police, fire, and emergency services. The platform also provides a geographical browsing option, displaying a United States Feed Map and allowing navigation by state, such as Maryland with 88 available feeds. This facilitates monitoring of specific regional public safety radio traffic without requiring a physical scanner.

Monitoring shortwave broadcast stations effectively requires accurate schedule information to identify transmissions. This online utility offers a straightforward, graphical interface designed to search for and display current shortwave radio broadcasting schedules. Users can precisely filter results by frequency, specific language, broadcaster, time of day, and even by shortwave band, which simplifies the process of pinpointing desired content. The database, last updated on March 26, 2023, details station callsigns (e.g., BBC), start and end times in UTC, days of the week, broadcast language, transmitter power in kilowatts, and azimuth. Crucially, it includes the precise geographical coordinates of transmitter sites, such as Woofferton in the UK or Al Seela in Oman. This data is invaluable for predicting signal paths and optimizing antenna direction for improved reception, a key consideration for serious SWLs. For instance, a search for BBC English broadcasts at 21:04 GMT quickly reveals multiple active frequencies like 17780 kHz from Woofferton, offering a clear overview of current transmissions. The tool processes queries rapidly, returning results within seconds, demonstrating its efficiency for broadcast listening enthusiasts seeking timely information.

Demonstrates RadioComm, a freeware Icom transceiver/receiver controller program for Windows, which facilitates memory programming, spectrum analysis, and interfacing with extensive frequency databases. The software allows users to program their Icom radio's memory, generate radio-frequency spectra, and connect the radio to a computer-based frequency database. It supports various Icom models, offering bidirectional control where virtual controls mirror the transceiver's physical controls and vice versa. The program's spectrum analysis feature, exemplified by tuning the WWV time standard at 15 MHz, provides insights into the AM passband, a capability often found in high-end Icom transceivers. While RadioComm offers these functionalities, the author, Paul Lutus, notes that it has been superseded by JRX (a virtual radio) and IcomProgrammer II (a memory programming utility), which are described as superior and compatible with more platforms. RadioComm is available as a 516 KB self-extracting executable, requiring an Icom CT-17 RS-232 interface box for radios that need it. Users can also customize the plain-text database to include unsupported Icom models. However, the author explicitly states that no user support is provided for this free program.

The SK6AW DX-Cluster provided a web-based interface for real-time DX spotting, featuring a flexible and configurable environment for amateur radio operators. It supported various display _skins_, allowed users to send spots, and integrated _e-mail and push notifications_ for alerts. The platform was designed to offer a comprehensive spotting experience, enabling users to track propagation and DX activity across multiple bands, similar to traditional _telnet clusters_ but with a modern web interface. This service, formerly hosted on dedicated servers, transitioned to a shared hosting platform before its scheduled shutdown on December 13, 2025. The decision to discontinue the cluster was attributed to a lack of resources for updating it to contemporary standards. Users seeking similar functionality are directed to alternative DX spotting services such as _dxsummit.fi_ or _dxheat_, which continue to provide real-time DX information and related features for the amateur radio community.

The project details a DIY SWR/Wattmeter designed around an _Arduino Uno_ shield, providing capabilities to measure RF power from 2 to **200 watts** and Standing Wave Ratio (SWR) for HF amateur radio bands. This construction features a compact design, integrating the measurement circuitry directly onto a custom PCB that interfaces with the Arduino Uno microcontroller. Key components include a directional coupler for sensing forward and reflected power, precision rectifiers, and analog-to-digital conversion for processing RF signals. The Arduino firmware handles calibration, calculations, and displays the results on an integrated LCD, offering real-time feedback on antenna system performance. The design prioritizes simplicity for homebrewers. Performance specifications indicate accurate readings within the **2-200W** power range, suitable for typical QRP to medium-power HF operations. The project provides schematics and a basic overview of the software logic.

Automatic Position Reporting System windows program, allow monitoring of real time geographical information such as the position of vehicles, the status of weather, radio direction finding and more.

This page details the construction of an easy-to-make collinear 360 degrees omni-directional, vertically polarised, antenna for 802.11b/g wireless networking.

How High should my Dipole be? Dipole Antennas and the effect of height above ground. The effectiveness of a dipole antenna is influenced by its height above ground, determined by the intended use such as DX work, local communication, directionality, omni-directionality, and feed point impedance. Through EZNEC modeling, the study evaluates a 40-meter dipole's performance at various heights, from 7 to 560 feet. Findings reveal that lower heights enhance omni-directional local communication, while higher placements favor DX work with low-angle radiation. The study emphasizes the importance of defining operational goals to optimize dipole height and performance.

A free soundcard application supporting PSK31, PSK63, RTTY, CW, and Phone operation. It can decode all PSK QSOs within a 4 KHz segment, maintaining a sorted list of heard callsigns; it can simultaneously decode RTTY via soundcard and an external modem, generates CW directly or via WinKey, and includes a voice keyer. WinWarbler interoperates with the free Commander, DXKeeper, and SpotCollector for transceiver control, logging, and spotting.

Presents the official download hub for the _Fldigi_ suite of amateur radio software, detailing its core components and associated utilities. The resource provides direct access to executables and source code for Linux, FreeBSD, macOS, and Windows operating systems, alongside comprehensive documentation in PDF format for each application. Specific version numbers and release dates are listed for _Fldigi_, _Flrig_, _Flmsg_, _Fllog_, _Flnet_, _Flaa_, and other tools, indicating active development and maintenance. It outlines the distinct functions of each program, such as _Fldigi_ for digital modem operations, _Flrig_ for transceiver control, and _Flmsg_ for NBEMS messaging. The site also references support communities on groups.io for Linux, NBEMS, and Windows users, fostering a collaborative environment for troubleshooting and usage guidance. Furthermore, it links to third-party repositories and mirrors, including SourceForge, for alternative download options and distribution-specific packages like RPMs for OpenSUSE and COPR for Fedora. The resource also includes links to _RigCat_ XML files for transceiver control configurations and a dedicated Wiki for _Fldigi_, offering additional technical insights and build instructions. This centralized repository serves as the primary distribution point for the W1HKJ software ecosystem, ensuring users can access current versions and support materials.

Swisslog, a robust freeware logging program, integrates seamlessly with various external devices and online services, making it a central hub for station operations. My field experience with similar logging software confirms the critical importance of features like real-time logging to services such as eQSL, QRZ, and Club Log, which Swisslog supports with both upload and download synchronization. The program also offers comprehensive award tracking for approximately 150 built-in awards, with the flexibility to add more, alongside detailed statistical reports. Beyond basic logging, Swisslog provides advanced functionalities like direct interfacing with popular digital mode software including WSJT-X, JTDX, and FLDIGI, ensuring accurate and rapid QSO entry for FT8 and other modes. It also supports multiple transceiver control (up to 8) from major manufacturers like Yaesu, Kenwood, and ICOM, and integrates with rotor control systems such as ARS-USB and Hy-Gain DCU. The _DX-Cluster_ integration is particularly useful, displaying spots with real-time award status and automatic detection for SOTA, POTA, and WFF from spot comments, which can significantly improve DXing efficiency. The software's world map feature includes various projections and layers for DXCC, IOTA, and WAZ, with a **double-clicking** function to turn the rotor, and provides accurate propagation predictions. It also supports multiple callbook and QSL manager databases, including QRZ and HamCall, and offers _multilanguage_ support in English, French, German, Italian, Portuguese, and Spanish.

Presents a practical design for a **crossed-dipole turnstile antenna** specifically engineered for 2-meter Amateur Radio Direction Finding (ARDF) events. The author, WB6RDV, details a robust, omnidirectional, horizontally-polarized antenna, addressing the international ARDF rules requiring such characteristics at a height of two to three meters above ground. This contrasts with the vertical polarization often used in Southern California, highlighting the design's adherence to specific event requirements. The electrical design employs a classic crossed-dipole with a 75-ohm phasing section, resulting in a slight impedance mismatch and an SWR of approximately 1.3:1 with a 50-ohm feedline. Construction utilizes readily available and inexpensive PVC plumbing components and 1/8-inch bronze welding rod for elements. The guide provides step-by-step instructions for mechanical assembly, including drilling element holes at precise 90-degree spacing and preparing the RG-179 matching section. WB6RDV shares insights from his own build experience, discussing the use of plated brass versus aluminum spacers for element attachment and the effectiveness of crimping as an alternative to soldering. The document also covers final assembly, including the integration of ferrite beads as a choke balun and options for weatherproofing and alternative mounting configurations, emphasizing the adaptability of the design for other VHF bands through scaling.

APRS for Linux is a multifaceted system for use with packet radio by Hams, it allows the monitoring of real time geographical information such as the position of vehicles, the status of weather, radio direction finding and much much more. It envolves mapping, GPS tracking, packet radio, etc

Optimizing low-band signal performance for contesting and DXing often involves complex antenna systems. This resource presents the FVR Spitfire Array, a "poor man's 4-square" design specifically engineered for the 80-meter and 160-meter bands. The core content is a PowerPoint presentation originally delivered at the 1998 Dayton Hamvention, outlining the design principles and practical considerations for this phased vertical array. The FVR Spitfire Array aims to provide directional gain and improved signal-to-noise ratio on the lower HF bands without the need for a large, rotatable Yagi. The design focuses on achieving effective directivity and pattern control using vertical elements, a common approach for enhancing receive and transmit capabilities on 160m and 80m, where full-sized Yagis are impractical for many stations. The presentation likely covers construction details, phasing networks, and expected performance characteristics. Further information is provided through an additional FAQ document, addressing common questions and offering clarifications on the array's operation and implementation. This supplementary material helps operators understand nuances of the design and troubleshoot potential issues, making the project more accessible for those looking to build or adapt the FVR Spitfire Array for their own station.

How to build a beverage antenna. How to deploy a BOG antenna for your next SWL DX-ing activity. Give it a try and follow the orientation tips for this bi-directional antenna.

The G3TPW CobWebb antenna design provides a compact, horizontally polarized, omni-directional solution for 20m, 17m, 15m, 12m, and 10m bands. This antenna utilizes five full-size half-wave dipoles, each bent into a square configuration to achieve omni-directional radiation without the nulls typically found in straight dipoles. The design incorporates a single 50-ohm coaxial feedline with an integrated air-core choke balun, minimizing feeder radiation and reducing EMC issues. Construction details include using PVC-covered multi-stranded copper twin cable for elements, supported by a fiberglass cross. The document specifies tapping points for impedance matching to 50 ohms on all five bands, ensuring high radiation efficiency without lossy traps or loading coils. Physical dimensions are compact, with 2.6-meter (8.5 feet) sides and a total weight of 6 kg (14 lbs), making it suitable for mounting on a 20-foot aluminum scaffold pole. Detailed instructions for assembling the junction box, including terminal strip wiring and the coaxial choke balun, are provided with photographs and diagrams. The design emphasizes a confined electric field to reduce coupling to nearby conductors, which helps mitigate TVI and makes the antenna less sensitive to mounting height or ground conductivity.

WiNRADiO Communications, a division of Radixon Group, was established in 1996 to commercialize extensive research in radio communications. The company specializes in integrating radio and computing technologies, offering a diverse product range for government, military, security, and amateur radio enthusiasts. Their product line includes the WR-G65DDCe 'EXCALIBUR Sigma' HF/VHF SDR receiver, noted for its capabilities, and the G31DDC EXCALIBUR, recognized for its price/performance ratio in shortwave listening with improved AMS and Noise Blanker features. The company also produces the G39DDC series EXCELSIOR for serious monitoring, WR-G526e/G527e/G528e modular SDR solutions for high-performance applications like phase-coherent direction finding, and the low-cost WR-G305e/G305i VHF/UHF receivers. Professional counterparts, the WR-G315e/G315i, support APCO P25 decoders and trunking options. WiNRADiO's offerings extend to the PFSL-G3 field strength logging system for mobile signal coverage, advanced multichannel telemetry systems like the MS-8323, and specialized antennas such as the AX-31C Log-Periodic and AX-81S active HF antenna. DRM decoder software is available for G3 Series receivers, enabling clear reception of DRM broadcasts. The WSS-420 Weather Satellite Receiving System and various antenna rotators are also part of their product ecosystem. WiNRADiO supports multiple operating systems, with MacRadio for Apple Macintosh users and LiNRADiO for Linux developers, providing drivers and network receiver solutions like the RLX-810.

The dipole antenna is an easily designed and made antenna usually used on HF, although can be (and sometimes is) made for VHF and UHF antennas, and in varying forms is also used as part of different designs of antennas i.e. as the driven element for directional antennas.

For amateur radio operators utilizing _APRS_ or requiring an external antenna for their GPS receiver, this resource details the construction of a compact, circularly polarized mobile antenna. The design is based on a classic turnstile configuration, employing two dipoles rotated 90° from each other and spaced a quarter-wavelength above a ground plane. A parallel-plate transmission line, fabricated from printed circuit board material, serves as both the connection method and mounting post for the dipoles, simplifying the feed network for circular polarization at 1.57542 GHz. The article outlines the fabrication process, starting with a 4-inch diameter hobby tin or brass base plate and #14 solid copper wire elements. It specifies using _RG-58/U_ or similar 50-ohm coax, with an 8-foot maximum length to minimize loss at the GPS frequency. The parallel-plate transmission line is constructed from two 2-inch lengths of single-sided _FR-4_ or G10 PCB material, 0.062-inch thick, with a specific 45° microwave turn cut on the active side. Final assembly involves an 8-ounce cream cheese container as a radome, and the article discusses the self-phased quadrature feed method to achieve circular polarization without a coaxial phasing line, resulting in an omnidirectional pattern suitable for GPS satellite reception.