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Design your VHF UHF Yagi antenna online, a JavaScript enhanced web page that implements the design of an antenna for 2m and 70cm bands. This page offers a streamlined experience for Yagi antenna design enthusiasts. It assumes prior knowledge of Yagi design principles, minimizing distractions with a user-friendly interface. Equipped with essential equations, it provides instant design feedback. Red font warnings indicate design limitations, ensuring practical results. Constraints include Gain (11.8-21.6 dBd) and Boom Length (2.2-39 wavelengths), with additional frequency-dependent restrictions noted in input fields.

Use real audio streams to listen to Hf and VHF stations around the world via remote controlled receivers connected to the web.

Official MixW website where you can download latest version and options for MixW, a widely used multimode software suite for amateur radio operators. The website provides access to various versions of the core MixW application, including legacy releases like Mix 2.21 for MS DOS and more recent iterations up to MixW version 3.2.105. Users can also obtain essential add-ons such as the **Olivia** support DLL, **Q15X25** support DLL, contest DLLs, and serial port emulation drivers. Detailed instructions are provided for Olivia mode operation, emphasizing the critical need for sound card sample rate calibration to ensure proper decoding and signal placement within specific frequency grids to minimize QRM. The page also links to external resources for localized help files in Spanish, Italian, French, German, and Polish, catering to a global user base. An alternative download page by G3VFP is also listed. MixW supports new transceivers for CAT control, including Yaesu FT-991, FT-1200, FT-3000, and Icom IC-7100, IC-7300, IC-7410, IC-7851. It also features an online callbook via QRZ.com.

This resource provides a detailed guide on constructing a J-pole antenna specifically for the 2 meter band, which is popular among amateur radio operators. The article outlines the materials needed, including various sizes of aluminum pipes and PVC, as well as the tools required for assembly. It emphasizes the simplicity and effectiveness of the J-pole design, making it an ideal choice for newcomers to amateur radio. The instructions are straightforward, allowing users to build the antenna in less than an hour, and include tips for tuning the antenna for optimal performance. In addition to the construction details, the resource includes practical advice on the assembly process, such as how to cut and join the pipes, as well as how to mount the SO239 connector. The author shares personal experiences and insights on achieving a low standing wave ratio (S.W.R.) and suggests modifications for creating bi-band or tri-band J-pole antennas. This comprehensive guide is enriched with photographs that illustrate the construction steps, making it easier for users to follow along and successfully build their own J-pole antenna.

The web page provides detailed information on a portable 10/20/40 meter vertical antenna designed for mobile operations, including modifications for 20 and 40 meters. It includes images and descriptions of the antenna setup in a car. The content is useful for amateur radio operators looking to enhance their mobile communication capabilities.

The G5RV antenna, with an overall length of **31.10m (102ft)**, functions as a 3/2-wave on 20 meters when installed horizontally at 12m (39ft), exhibiting a resonant frequency of 14.150MHz and an approximate resistance of 80 ohms. Its 10.36m (34ft) stub line, designed as a 1/2-wave on 14.150MHz with a 0.97 velocity coefficient, acts as an impedance transformer across other bands, aiming for multiband operation without traps. On 20m and higher frequencies, the G5RV demonstrates improved gain compared to a standard dipole, attributed to the _collinear effect_ from multiple 1/2-waves along the wire. The original design sought a multiband solution for limited spaces, often requiring an Antenna Tuning Unit (ATU) for effective operation across bands like 80, 40, 30, and 20m, particularly with modern solid-state PAs. Variants, such as the F8CI modification, incorporate a 1/4 current balun at the stub line's base for symmetrical-to-asymmetrical transition, known as a _remote balun_. Proper flat-top or inverted-V installation is critical for maintaining symmetry and collinear gain, with inverted-V apex angles below 120° progressively diminishing higher-band performance.

Drake R8 Communications Receiver Reston Virginia, USA. Allow remote control of a DRAKE receiver with a nice interface that permi you to rotate the main tunin knob, set mode and change some key settings.

The page provides detailed information on the G5RV antenna, its feeder arrangement, and efficient operation on HF bands from 3.5 to 28 MHz. It includes dimensions for installation in limited spaces, variations for different bands, and impedance matching details.

The Super Loop Antenna page, designed by Jim W4FTU, provides detailed information on the RadioWorks \'Superloop III\' antenna as an alternative for operators with limited space. The page discusses the physical variations of the antenna, including dimensions and materials used, as well as its electrical characteristics such as the 30\' ladder line. The content is useful for amateur radio operators looking for antenna options for the 80 and 40 meter bands, especially those with small lots or zoning restrictions. The page is well-organized and informative, making it a valuable resource for antenna enthusiasts.

Cubic quad antennas are renowned for their high gain, excellent front-to-back ratios, and low angles of radiation, making them a popular choice among amateur radio operators. This resource provides detailed designs for constructing cubic quads optimized for 2, 6, 10, 12, and 15 meter bands. The lightweight structure can be easily built using fiberglass tubes and central hubs, allowing for portability and ease of assembly. The article discusses the specific dimensions and configurations required for both HF and VHF applications, emphasizing the importance of proper spreader lengths and boom dimensions. It also highlights the challenges of assembling larger cubic quads in limited spaces, offering practical solutions for hams with smaller backyards. With a focus on multi-band operation, this guide serves as a valuable resource for both novice and experienced operators looking to enhance their antenna systems.

The 160/80m coaxial receiving loop antennas are designed to enhance reception on the top bands while minimizing noise. These antennas are particularly beneficial for operators with limited space, as they can be constructed using lightweight materials, making them portable and easy to deploy. The standalone 80m loop has a diameter of approximately four feet, allowing for easy rotation and installation above existing VHF antennas. Over the years, many amateur radio operators have turned to loop antennas as a viable alternative to traditional beverage antennas. The design allows for significant noise reduction, especially when paired with a quality pre-amplifier. Experimentation with various configurations has led to the discovery that diamond-shaped loops provide optimal performance. Users have reported a noticeable improvement in signal quality, making these loops a valuable addition to any low-band DXing setup.

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.

Author evaluated a custom-built passive AM loop antenna, achieving notable DX reception including KLBJ Austin (230 miles) and WWL New Orleans (700 miles). The antenna operates solely on resonant inductive coupling, enhancing weak signal reception without external amplification. This project illustrates how fundamental RF design—calculating inductance, capacitance, and Q factor—can significantly boost performance of consumer-grade radios. Detailed construction techniques, theoretical background, and optimization strategies for effective loop antenna design are presented for amateur and experimental use.

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.

Details the construction of a **multiband vertical** antenna, specifically designed for stealth operation in a rented property, covering 80m, 60m, 40m, and 30m. The author, N3OX, leverages a 12m Spiderbeam telescoping fiberglass pole as the primary support, noting its sturdiness compared to typical fishing rods while remaining light enough for quick deployment and takedown. The radiating element is a 14 gauge Flex-Weave wire, attached to the pole's top with a rubber grommet, and fed by 27 bare 18 gauge radials spread across a 40-foot square backyard. N3OX describes the impedance matching solution, opting for custom-built L-networks over a remote tuner to enable fast bandswitching. Using an MFJ-259B and EZNEC modeling, base impedances were measured and component values calculated with G4FGQ's L_TUNER and SOLNOID_3 programs. The 80m coil is wound on a 3.5-inch PVC form, while the 30m, 40m, and 60m coils are air-wound, self-supporting #10 wire. Variable capacitors are incorporated for 40m and 30m shunt elements, with the 60m impedance matched by a series inductor. The project includes a **servo-controlled** homebrew band switch, utilizing a two-pole 12-position ceramic wafer switch for remote operation, addressing the limited 80m bandwidth. The entire matching network is housed in a weather-resistant shelter constructed from lumber and aluminum flashing. N3OX reports good DX results at 100W, estimating the total cost between $150 and $250, depending on existing parts.

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.

On this page you can listen to and control a short-wave receiver located at the amateur radio club ETGD at the University of Twente. In contrast to other web-controlled receivers, this receiver can be tuned by multiple users simultaneously, thanks to the use of Software-Defined Radio. Provided by PI4THT

This PDF article from April 2001 QST details the construction of the "NJQRP Squirt," a reduced-size 80-meter inverted-V dipole antenna. The resource provides a general construction sketch, a photograph of the assembled antenna, and specific dimensions for PC-board insulators. The antenna consists of two wire legs, each approximately **34 feet long**, separated by 90 degrees, fed at the center. It is designed for operation on 80 meters (3.5-4.0 MHz) as a quarter-wavelength antenna, requiring a low-loss feedline and an external antenna tuner due to its non-resonant feedpoint impedance. Construction utilizes readily available materials, including 1/16-inch glass-epoxy PC board for end and center insulators, and #20 or #22 insulated hookup wire for the elements. The feedline specified is 300-ohm TV flat ribbon line, with a note on potential trimming for tuner compatibility. N2CX reports the antenna's center should be elevated to at least **20 feet**, with ends no lower than seven feet above ground, resulting in a ground footprint of approximately 50 feet wide. The design prioritizes NVIS propagation for local 80-meter contacts. DXZone Focus: PDF Article | 80m Inverted-V Dipole | Construction Notes | 34 ft element length

The only ACARS software to feature in-line message decoding and aircraft tracking. ACARS Reception and Decoding Software for legacy Windows versions. This software will allow you to decode the ACARS signals received by your air band receiver using the soundcard that is installed in you PC

The Pfeiffer Maltese Quad Antenna System presents a unique approach to traditional quad antennas by utilizing a linear loading technique. This method effectively reduces the overall size of the antenna while maintaining its performance capabilities. Designed by Andrew Pfeiffer, the antenna's configuration resembles a Maltese cross, which not only enhances its structural integrity but also allows it to withstand challenging environmental conditions. This system is adaptable, offering various configurations from a 4-spreader Maltese Quad to a 16-spreader Maltese Quadruple-Cross, making it suitable for operators looking to optimize their setup without sacrificing efficiency. This antenna system is particularly versatile, covering multiple bands including 40, 20, 17, 12, and 10 meters. The design focuses on minimizing the physical footprint while ensuring effective signal transmission and reception. Amateur radio operators can benefit from the detailed plans available in the accompanying PDF, which outlines the construction process and specifications. Whether you're a seasoned DXer or a newcomer to the hobby, the Pfeiffer Maltese Quad Antenna System offers a practical solution for enhancing your station's capabilities.

Build your mobile antenna which outperforms Hustler by 10db and ATAS-100 by 18db. From 80 to 10m. The HB9ABX mobile HF antenna, designed for 10 to 80 meters, was developed by Felix Meyer and outperforms commercial antennas like HUSTLER and YAESU ATAS-100/120 in field tests. Made from fiberglass rods and enamelled copper wire, it includes a loading coil with adjustable taps for tuning across bands. Installation requires solid grounding, and adjustments are made via whip length and coil settings. An antenna tuner ensures optimal SWR. Users must handle fiberglass with care due to health risks. This design proved highly effective in South America and Europe.

The RockLoop Antenna is a compact multiband portable and indoor antenna suitable for QRP operations on the 10, 14, and 21 MHz bands. The page provides detailed information on the design and usage of this antenna, making it a valuable resource for amateur radio operators looking to improve their setup. The intended audience is amateur radio operators interested in building and using antennas for QRP indoor operations.

The boomless quad antenna is a unique design that offers versatility for amateur radio operators. This antenna consists of two half-wave dipoles arranged in a square or circular shape, allowing for both vertical and horizontal polarization depending on the feed point. The design facilitates easy installation and rotation, making it suitable for various operating conditions. The construction utilizes strong materials, such as bamboo, and incorporates waterproofing techniques to enhance durability. This project outlines the necessary dimensions and materials, including copper wire and insulators, to successfully build the antenna. It emphasizes the importance of tuning each radiator element for optimal performance. The boomless quad is particularly effective across multiple HF bands, including 14 MHz, 21 MHz, and 28 MHz. By following the detailed instructions, operators can achieve a reliable and efficient antenna setup that enhances their DXing and contesting capabilities.

DXKeeper is a robust, freeware logging application designed for amateur radio operators, providing extensive capabilities for managing two-way radio contacts. It records and organizes QSO data, integrates with various callbook CD-ROMs like _HamCall_ and QRZ.com for automatic data population, and supports real-time logging from digital mode software such as MMTTY and MixW. The software runs on Windows NT through 8, supporting both 32-bit and 64-bit systems, and is a core component of the DXLab Suite. This application offers detailed tracking for numerous awards, including DXCC, WAZ, WAS, and IOTA, highlighting needed entities and automating the QSL process. It generates QSL cards and labels, addresses envelopes, and facilitates uploading and downloading of QSO confirmations with eQSL.cc and Logbook of the World (LotW). DXKeeper also interoperates seamlessly with other DXLab Suite members like Commander for transceiver control and SpotCollector for DX spot aggregation, significantly streamlining contest and DXing operations by providing a unified interface for logging and station management, including over **40** supported awards and **3** major online QSL services.

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.

The Cubical Quad antenna is a popular choice among amateur radio operators due to its robust design and excellent performance characteristics. This resource provides essential scaling formulas that help determine the lengths of the antenna elements and the necessary gamma match values for various frequencies. The design is adaptable, allowing operators to optimize for gain or front-to-back ratio by adjusting the spacing between elements. The accompanying Excel files facilitate precise calculations, making it easier for both beginners and experienced hams to construct their own Cubical Quad antennas. In addition to the design formulas, the resource includes practical insights from the author, who has successfully built and utilized these antennas in various field events. The document outlines the tuning process for achieving minimum VSWR, ensuring optimal performance. With detailed illustrations and performance data, this guide serves as a comprehensive reference for anyone looking to delve into Cubical Quad antenna construction and optimization, enhancing their amateur radio experience.

All about folded dipoles, a variation of the dipole is an antenna called a folded dipole. It radiates like a dipole but sort of looks like a squashed quad.

Grig is a freeware simple Ham Radio control (CAT) program based on the Ham Radio Control Libraries (Hamlib). It is intended to be highly generic presenting the user to the same graphical user interface regardless of which radio is being controlled. Grig supports the most commonly used CAT commands that are implemented by Hamlib, and integrates well with other ham radio programs like Xlog and gMFSK. Grig has been developed on Linux, but has been ported on Mac and Windows OS.

You can listen to a remote controlled ham radio station and if you are a authorized ham you can talk. Originally hosted at lamonica.com this is one of the very first online ham radio stations on the net.

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.

GlobalTuners provides access to remotely controlled radio receivers over the internet. You can listen to ham radio, shortwave radio, air traffic control, airband, ACARS, airports and much more. Tune remotely controlled receivers from all over the world with your browser and listen live.

A very beginner's guide to coax cables. Characteristics, detailed comparison of typical coaxial cables, commonly used connectors, and a few words about SWR.

Detailed plans of my homebrew receiver. Frequency coverage is from below 300kHz to 30MHz. Pictures, schematics, board layouts, parts lists and more can be found here.

Cybercorder 2000 was a versatile audio recording software that allowed users to capture audio from various sources, including radios and internet streams. It functioned similarly to a VCR, enabling users to schedule recordings and save them in WAV or MP3 formats on their PC. Although the software is no longer sold or supported, it provided a range of features that made audio recording easy and efficient. Users could listen to audio being captured in real-time and utilize a built-in sound editor for editing recordings. As Cybercorder 2000 has been retired, users are encouraged to consider Total Recorder Professional Edition as a suitable replacement. Total Recorder offers enhanced features such as scheduled recordings, background recording, and the ability to convert and edit sound files. With its user-friendly interface and robust functionality, Total Recorder remains a popular choice for those looking to record audio from various sources, making it a valuable tool for amateur radio enthusiasts and audio recording professionals alike.

"Some have called the T2FD a ""squashed rhombic"" antenna. It does bear some design similarities to the non resonant rhombic, but theoretically it is admittedly inferior. However, the T2FD performs well in a modest amount of space."

Ten meters propagations beacons compiled by Bill Hays WJ5O

The G3JVL 6 Meter ground plane vertical is a compact antenna that is ideal for portable operations. If needed, it can be disassembled into a very small bundle no longer than the longest element.

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.

Antenna suitable for all the HF amateur bands, including the so called WARC bands by vk6ysf

This resource, last modified in August 2000, provides a personal amateur radio web presence for N3LS Larry, focusing on homebrew project announcements and a curated list of amateur radio links. It mentions plans for 10 to 15 new homebrew projects, indicating a focus on DIY electronics construction. The page also offers guidance for aspiring amateur radio operators, including tips for obtaining study guides and links to testing practice sites, suggesting an educational component for newcomers to the hobby. The content primarily serves as a personal hub, with a strong emphasis on sharing homebrew endeavors and supporting new licensees. While specific project details are not present, the intent to add numerous homebrew projects highlights a practical application of electronics knowledge. The inclusion of study resources aims to assist individuals in preparing for amateur radio license examinations, making it relevant for those seeking to enter the hobby.

Loop Recorder, a Windows-based software, offers continuous audio recording capabilities, specifically designed for capturing broadcasts from radio or internet radio sources. It features a **looping buffer** that prevents missing the beginning of desired audio segments, such as songs or specific transmissions. The application supports various audio formats including **MP3**, WMA, Ogg Vorbis, and WAV, allowing users to save recordings in their preferred codec. The software provides functionalities for scheduled recordings, enabling automated capture of content at predefined times. It caters to a range of users, from radio enthusiasts monitoring air traffic and scanner amateurs archiving communications, to professional environments requiring 24/7 broadcast storage or call center monitoring. The Pro version extends these capabilities for more demanding, continuous operational tasks. Compatibility spans multiple Windows operating systems, from Windows 9x up to Windows 10, ensuring broad usability across different system generations.

This antenna was designed by N6JSX Kuby for Transmitter hiding. Fitting the requirements of directionality, high gain, and portability. This antenna was derived from the ARRL Handbook information on Quagi's and Yagi's; in the absence of two meter Quagi information, UHF Quagi dimensions were scaled into 146 MHz use.

A 27 pages pdf file revealing secrets of the cobwebb or cobweb multiband antenna with many pictures and assembling details. A great document that can guide you in making your own cobweb aerial.

Version 7.22 of XMLog provides a fix for an issue where the ARRL LoTW application TQSL produced error messages concerning invalid "MY-COUNTRY" values, ensuring smoother integration for award submissions. The software supports flexible log searching, allowing users to select log subsets based on any field, such as RTTY QSOs on 40 meters during a specific month, or entries for a single country with sent but unreceived QSLs. XMLog tracks DXCC, WAZ, WAS, county hunting, IOTA, and grid square awards, managing QSL sent/received status and submission status to award sponsors, with LoTW crediting for DXCC and WAS. It generates detailed reports summarizing QSL status by band and mode, identifying needed countries/states/zones, and listing critical QSOs that could boost award totals. The system also integrates with callbook services like QRZ.com (subscription required) and WM7D.net for lookups, and facilitates QSL and mailing label printing using standard or custom layouts. Further capabilities include ADIF, Excel, and CSV log import/export, a Packet Window for Internet PacketCluster nodes or TNCs with history and scripting, and vocal/CW alerts for needed QSOs based on PacketCluster spots. Rig control is supported for a wide array of Alinco, Elecraft, Flex, Heath, Icom, JRC, Kenwood, TenTec, and Yaesu transceivers, enabling frequency/mode synchronization and control. CW support is provided via a serial port interface compatible with N1MM or K1EL WinKeyer, allowing CW sending from a keyboard or pre-programmed messages.

This program descrambles band inverted encrypted transmissions, usually found on VHF/UHF. It uses a NCO (numerical controlled oscillator) to re-produce the originally inverted audio band. Use it only if legally permitted in your country. I assume no responsabilities deriving from its use. Standard disclaimer applies

Source code for morse training program and a ready-to-use compiled application morse.exe

The Flower Pot Antenna project details a portable dual-band antenna primarily operating on 10 meters, with secondary resonance near the 30-meter band. Construction involves winding RG58 coaxial cable uniformly around a large plastic flower pot, approximately 70cm high with a 60cm top diameter. The design eliminates the need for radials, contributing to its compact and lightweight nature. Key construction steps include soldering the inner conductor to the shield at one end of the wound cable and connecting the wound cable's shield to the rig cable's inner conductor at the base. An LC network, comprising a variable capacitor (0-200pF) and an inductor (10 coils, 5cm diameter, 2mm wire), is inserted between the wound cable's inner conductor and the rig cable's shield. Tuning is performed with an antenna analyzer, adjusting cable length and the variable capacitor for optimal impedance on 10 meters. The antenna performs effectively when installed horizontally.

PropView is a free application that uses the included VOACAP, ICEPAC, and IONCAP engines to graphically display band openings between two locations over a specified 24 hour period. It can also build schedules for the IARU/HF beacon network and automatically QSY your transceiver to monitor each scheduled beacon.

Offer PC based virtual instrument for electronics enthusiasts, students and professionals, including full-fledged sound card real time Oscilloscope, Spectrum Analyzer and Signal Generator.

Article with detailed pictures of an endfeed antennna for 20 and 30 meter band