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This guide provides step-by-step instructions for constructing a tin can waveguide antenna, commonly known as a cantenna, for enhancing WiFi signal range. The project is budget-friendly, costing under $5, and utilizes easily accessible materials like a food can and basic electronic components. The design is suitable for 802.11b and 802.11g wireless networks, operating within the 2.4 GHz frequency range. To start, gather the necessary parts including an N-Female chassis mount connector, nuts, bolts, and a suitable can. The assembly process involves drilling holes in the can for the connector and mounting the probe. The guide emphasizes the importance of can dimensions and placement for optimal performance, encouraging experimentation for best results. This project is ideal for amateur radio operators and DIY enthusiasts looking to improve their wireless connectivity without significant investment. Safety precautions are advised, as the author does not hold electrical engineering credentials. Users are encouraged to take responsibility for their equipment and ensure proper assembly. With this simple yet effective antenna, users can extend their WiFi coverage and enjoy enhanced connectivity.

Details the history and product focus of RM Italy, an Italian manufacturer specializing in radio communication devices since 1974. It outlines the company's journey from its founding by Remo Marchioni in Porretta Terme, Italy, to its current position in the market, emphasizing its commitment to high-quality, competitively priced products. The resource highlights RM Italy's core product lines, which include RF power amplifiers for various bands such as HF, CB, VHF, and UHF, alongside power supplies and DC-DC converters. It also mentions the company's involvement in _ISM products_, indicating a broader application of its radio technology beyond amateur radio. The page underscores the company's strategic approach, focusing on a modern manufacturing structure and an effective sales network to deliver reliable products and strong after-sales support. The company's amplifiers are known for providing significant power output, with some models offering **up to 600W** on HF, catering to both amateur and professional radio operators seeking robust signal amplification.

Here you will find many information on loop antennas.

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.

DigiPan provides a panoramic display of the frequency spectrum in the form of an active dial scale extending the full width of the computer screen. DigiPan is the result of a joint effort between myself and Nick Fedoseev, UT2UZ, the author of MIXW32, and is intended to make PSK31 operation easier and more enjoyable for everyone. You can download digipan 2.0 for windows form here.

HRO offers a variety of amateur radio products for sale, including transceivers, antennas, and accessories. Users can browse products by category or search for specific items. The site also features promotions and discounts on selected items.

Large colletion of antique radios with details and photos

GCM is a freeware great circle map plotting software for windows, you can choose colours, scale, meridians, fields and or squares from the maidenhead locator system.

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.

Over 16.7 million callsigns are indexed within the HamCall World-Wide Callsign Database, a long-standing resource for amateur radio operators. This online tool facilitates rapid lookups of callsign data, including operator details and QSL photos, which are crucial for confirming contacts and pursuing operating awards. The database integrates FCC updates as they are released, ensuring timely access to current licensing information. The platform also features a live **DX cluster** displaying recent spots across various bands, from 160m to 3cm, with specific spot counts for active bands like 15m (50 spots) and 10m (46 spots). Users can view **band activity** summaries, providing an immediate overview of propagation conditions and active frequencies. Additionally, the service provides access to a hamfest calendar and amateur radio news updates, making it a multi-faceted resource for daily operating and event planning. Since 1989, the HamCall DVD has supported this server, alongside HamCall.net Gold Memberships, demonstrating a sustained commitment to providing comprehensive callsign data.

The Racal VRM-5080 VHF FM Radio Transceiver, designed for military vehicle installation, operates across the 30 to 76 MHz frequency band with 50 Watts of output power. This unit, along with other featured items like the DOM-410 Geiger Counter and the RT-524/VRC VHF Vehicle Radio Station, represents the core offerings of Army Radio Sales Co. The site provides detailed technical specifications for each product, including frequency ranges, power output, channel spacing, and operational voltage, catering to collectors and restorers of vintage military communications gear. Beyond product sales, the website serves as a repository for historical information, offering access to military radio manuals, articles, and thousands of pictures. Resources such as the SCR-694 / BC-1306 Radio Signal Corps Training Film and TM 11-2715 Installation of Radio Equipment in 1944 Jeeps are available. The platform also hosts a free classifieds section for users to advertise their military radio needs and offers insights into related military vehicle projects. Additional content includes information on the STR37E VHF Aircraft Radio Transceiver, operating from 116.00 MHz to 135.95 MHz, and the R-442/VRC VHF Vehicle Radio Receiver, covering 30-75.95 MHz. The site also features articles on topics like the Ukrainian Expedition and data plates for military Jeeps, broadening its appeal to military history enthusiasts.

This page describes a homebrew QRP SSB transceiver built by WB9IPA.

WinDRM is the hottest digital mode on HF today! Nothing else exists where you can transfer data at almost 1KB/s without using proprietary hardware. HF Digital Radio Mondiale allow fast data, pictures, and voice over a 2.5Khz bandwidth. In this GDrive folder you can find a 2008 version of WinDRM for WIndows.

Opensource software implementation of a DRM Receiver. Digital Radio Mondiale (DRM) is a new digital radio standard for the long-, medium- and short-wave ranges

Amateur Contact Log (AC Log) by N3FJP is a commercial Windows-based general logging program designed for amateur radio operators, supporting Windows 7 through 11. It provides comprehensive tracking for various operating awards, including Worked All States (WAS), Worked All Counties, Worked All Countries (WAC), DXCC, VUCC, Grids, Zones, IOTAs, and Lighthouses. The software features a customizable user interface, allowing operators to display specific data fields and adjust font sizes. It includes built-in databases for counties and countries, facilitates queries by band, mode, or power level, and offers a bearing and distance calculator for DX contacts. AC Log also provides DX spotting via Telnet or packet TNC, supports keyboard CW, and can play wave files. The program offers full support for ADIF import and export, enabling seamless integration with external services like eQSL, QRZ, Club Log, and the ARRL's Logbook of the World (LoTW) for QSO uploads and confirmation downloads. It interfaces with popular transceivers from Elecraft, Icom, Kenwood, Ten Tec, and Yaesu, and connects with digital mode software such as WSJT-X, Fldigi, and JTAlert via API. AC Log includes a Net Manager form for group logging, prints basic QSL label strips, and integrates with QRZ and Ham Call lookup services. The software is fully networkable for multi-PC operation, supports Parks on the Air (POTA) logging, and displays worked entities and DX spots on a real-time world map. Full featured Trial version available for 45 days

Examines the operational differences between **quad** and **Yagi** antenna designs, focusing on their respective performance characteristics for amateur radio applications. The document highlights key metrics such as forward gain, front-to-back ratio, and bandwidth, which are crucial for effective DXing and contesting. It discusses how element configuration, boom length, and material choices impact the efficiency and radiation patterns of each antenna type across various HF bands. Practical considerations for antenna builders are addressed, including structural integrity, wind loading, and overall weight, particularly when using fiberglass spreaders for quads. The resource also covers precipitation static reduction in quads due to their closed-loop design and their ability to operate efficiently at lower elevations compared to Yagis. It provides insights into dual-polarization feed systems for quads, offering independent vertical and horizontal feed points for enhanced operational flexibility.

A quick tale of cw morse code alphabet by Wilko J. Hollemans PA3BWK

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.

Satscape is a freeware program for the PC Macintosh and Linux. It produces real-time displays of where any Satellite is, and predicts passes for your locale. There are about 8000+ satellites in orbit, a lot of these are just junk and debris such as discarded rocket bodies, but quite a few are working Satellites.

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.

Scanner master is a popular radio-scanner online dealer.

Full line Amateur Radio dealer - Alinco, Icom, Kenwood, Yaesu radios, various antenna and accessory manufacturers.

Dealer for Cb radios, Cb antenna & accessories Galaxy radio, Cobra cb radio, Ranger, Texas Star, Palomar. Police scanner, radar detector, GPS, GMRS, FRS, Wilson cellular amplifier & antennas. Owners manuals, schematics and links.

Difona is a german base dealer for amateur radio transceivers, anntennas, PA, power supplies, accessories from several brands like Kenwood, ICOM, Yaesu, MFJ, ACOM, DAIWA, Diamond, DXSR, Alinco, Ameritron, ETM, Fritzel, UKW Technik, AOR, Bencher, Create, G.B., Heil, Hotline, Maldol, Tonna, Titanex, Outbacker, Hy-Gain, Mirage, SCS, SGC, SSB Elektronik

Repair and sale of icom kenwood and yaesu products

Ham radio dealer based in germany offer RF power amplifiers, from Alpin and SPE, antennas, RFI suppression products and GSM GPRS products

The _Morgain_ antenna for 40/80 meters is a straightforward and cost-effective wire antenna design, requiring careful tuning for optimal performance across two bands with low SWR. Construction involves creating 12 cm PVC spacers with three holes for wire insertion, along with larger terminals for anchoring and connector housing, which should be sealed with silicone. The provided measurements detail the specific lengths for the antenna elements, crucial for achieving resonance on both 40m and 80m bands. Tuning the Morgain antenna necessitates fabricating four wire segments with pins to temporarily connect and adjust the bridging points symmetrically for both 40m and 80m. This iterative process, though time-consuming, ensures the antenna functions effectively for decades once the precise connection points are soldered and protected. The design emphasizes ease of construction and long-term stability, making it a practical solution for hams seeking a dual-band wire antenna.

A freeware HF propagation prediction tool, that interface the VOACAP tool by Alex VE3NEA

Programs for hams written by Alex Shovkoplyas

QRP and Homebrew HAM Radio by DL2FI and DL7NIK QRP Made in Germany and more QRP Kits, qrp transceivers, accessories, mini keyers dealer for antennas, atu and more accessories

SDR software for SoftRock40 freeware by Alex VE3NEA

EasyPal is a sophisticated digital Slow-Scan Television (SSTV) application that utilizes soundcard technology to encode and decode SSTV signals. Developed by the late Erik Sundstrup (VK4AES SK), this software has evolved into a versatile communication tool for amateur radio operators, extending beyond basic image transmission capabilities. EasyPal implements Digital Radio Mondiale (DRM) encoding technology, enabling efficient data transmission over narrow 2.5 KHz channels on both HF and VHF frequencies with remarkable speed. The application supports multiple file formats, including jpg, pdf, txt, doc, and xls, as well as specialized forms such as ICS-213 and ICS-213 (ARES). Additionally, EasyPal offers email functionality through designated repeater stations with internet access. Its responsive development history and robust feature set have established it as a premier digital SSTV solution in the amateur radio community, though users of Windows 11 should note specific configuration requirements to ensure optimal performance.

Hong Kong's only full-service amateur radio store. Full line of Amateur Radio and Two-way equipment and accessories from companies such as Yaesu, Icom, Kenwood, Motorola, MFJ, Alinco, Diamond, AOR and many, many more. Knowledgeable staff with many years of experience in the radio business TAX-FREE shopping (no sales, VAT, GAT or other taxes) HF, VHF, UHF transceivers, receivers, walkie-talkies, antennas, antenna tuners, coax and connectors

This antenna modification is for the IEEE 802.11b networking protocol that operates at 2.4 GHz. It can be scaled easily to the 5 GHz frequency used by IEEE 802.11a by simply scaling the dimensions on the feed can and the excitation antenna to 2.4/5 = 48% of the dimensions shown above.

Radio sales to over 60 countries, source for all communication equipment, individual hobbyists, professionals and dealers.

A simple dual band VHF UHF jpole antenna Projects by Dale Kubichek

A 144 MHz kilowatt amplifier project details the construction and performance of a high-power VHF linear using the GU74b tetrode. This Russian tube, equivalent to the Svetlana 4CX800, is noted for its conservative datasheet ratings, performing closer to 800-1000W anode dissipation in practical applications. The design prioritizes compactness and achieves 1.2 kW output with only 20W of drive power, demonstrating a 70% efficiency at 2.5 kV plate voltage. The amplifier has been successfully deployed in demanding _EME_ (Earth-Moon-Earth) operations since June 1994. Challenges encountered during development included achieving stability with a grid-1 input configuration. The author, _CT1DMK_, opted not to publish the full design due to its complexity, suggesting it might be difficult for less experienced builders to replicate successfully. However, he invites direct contact for those with specific interest in the design. Future plans include a "144MHz GS35b compact amplifier" project, promising another kilowatt-plus design. This resource offers insights into high-power VHF amplifier construction and the practical application of specific power tubes.

AirLink Express is a user friendly digital mode software package for the Amateur Radio Operator. The software is compatible with Microsoft Windows XP and Microsoft Windows Vista. It offers PSK, MFSK and RTTY digital modes with logging and macro capabilities. If you have ever used the Digipan software you will be immediately familiar with Airlink Express. The user interface is almost identical by Alex Krist, KR1ST

Contains a PC sound card based signal generator. It can generate functions, multitones, arbitrary waveforms, burst tones, MLS, DTMF, musical scales, white noise and pink noise, and frequency/amplitude sweep. Fully functional free trial downloadable.

Import-Export Worldwide shipment of Radio-scanners, shortwave-receivers and more. Wholesale and retail-trade

Amateur Radio, Citizen's Band Radio, Commercial Radio, General Electronic items, Marine Radio, and Short Wave Radios.

Australian dealer, HF linear amplifiers, power supplies, baluns, HF UHF yagis and verticals including multiband HF verticals.

German Ham radio dealer for hf radios by Icom Yaesu Kenwood Alinco and Alan

A full line of repeaters, modules to build repeaters, and accessories.

Selecting an appropriate antenna system for shortwave broadcasting involves evaluating various types based on performance, cost, and operational parameters. This resource details the critical specifications for broadcast antennas, including average and peak power ratings, directivity, takeoff angle (TOA), horizontal beamwidth, and gain, emphasizing that a 100-kW transmitter requires an antenna rated for 150 kW average and 400 kW peak. It clarifies that low TOA signals travel thousands of kilometers, while high TOA is for local coverage, and nearly all modern shortwave broadcast antennas are horizontally polarized. The article explores specific antenna types, such as Log-Periodic Antennas (LPAs), which offer wide frequency ranges (e.g., 2-30 MHz) and directional patterns with 11 dBi gain, costing from $20K to over $100K for multi-curtain versions. Dipole arrays, also known as curtain antennas, are prevalent in international broadcasting, featuring steerable beams (±15° and ±30°) and mode-switching capabilities to alter TOA, with high/low pairs costing over $1 million. Fan dipoles are noted for omnidirectional patterns, smaller size, and lower cost for low-power applications, while rhombics, though simple, require resistive termination and incur several dB of I2R losses. Balun considerations are crucial, as most communications baluns are not rated for the higher average and peak powers of AM broadcast transmitters. Modern shortwave antennas utilize durable materials like Alumoweld wire rope for radiators and support elements, avoiding copper, fiberglass, or materials prone to stretching or deterioration. Feeder systems for high-power stations often require tapered-line baluns to convert 50-ohm unbalanced power to 300-ohm balanced for connection to the antenna.

A 70 MHz Moxon rectangle antenna, built with 0.83mm enamelled copper wire and a lightweight fiberglass kite spar frame, offers a compact two-element beam solution for the 4-meter band. This design, originally for HF, scales effectively to VHF, reducing the antenna's width to approximately 75% of a half-wavelength while allowing direct coaxial cable feeding. The author, G6GVI, details the construction process, including the use of an automated design tool for precise dimensions. Initial field testing revealed a VSWR of approximately 1.3, with distinct nulls observed at 90 degrees when the antenna was mounted horizontally. The lightweight build, supported by a wooden block and U-bolt for mast attachment, makes it suitable for thinner mast sections. Further experimentation included testing with vertical polarization and considering its potential for indoor loft installation due to its relatively short major axis, offering a discreet option for urban hams.

This homebrewed antenna tuning unit also incorporates a 50-ohm QRP dummy load, power meter (1 or 10 Watts full scale), and SWR meter

Electronic World atlas for radio amateurs. DXCC and province prefixes, CQ and ITU Zones in the rectangular and azimuthal projections, continuous zoom and scrolling, Gray Line, city and island index, unique hierarchical prefix database. COM/OLE Automation for easy integration with 3-rd party programs.

A drawn of a ZL Special antenna for the 10 meter band or 28 Mhz

The Radio Attic serves as a dedicated online marketplace for **antique radios**, offering a platform for enthusiasts to buy and sell vintage communication equipment. The site features classified advertisements, each displaying full-color photographs of the radio, a detailed description, and a direct link to the seller's email address. This structure facilitates direct communication between buyers and sellers, as transactions are handled independently, not by the webmaster. Listings are categorized by style, manufacturer, and year of manufacture, including models from Admiral, Airline, Atwater Kent, Crosley, Emerson, Fada, General Electric, Philco, RCA, Silvertone, and Zenith. The platform also tracks new additions, with 49 radios and 6 books added in the past 30 days, and highlights recently sold items, totaling 157 radios this year. Beyond sales, the site provides resources like a price guide and information on upcoming swap meets, such as the Southeastern Antique Radio Society's Spring Swap Meet in Forsyth County.