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Single Coax Feed to Multi-Band Copper Cactus Antenna.

DXpeditions, Online Logbook and personal stuff

Shortwave Monitoring Station in Berlin: DX news, HF propagation, greyline, DRM news, QSL gallery, audio recordings and more

German CW radio club

Maker of QRP Kits, QRP CW receiver and transmitters, audio CW Filters, antenna tuners, dummy loads, and morse code practice oscillator

Ham Radio and DX topics by AC6V

One another useful Table for the HAM's practice.

ON7YD slow CW and DFCW TX program for Windows, works with Argo. By Rik Strobbe

A 27-28 Mhz quad loop antenna by Bernard Mourot F6BCU in french

A multiband vertical dipole antenna by ON4BAI

Schematic of Yaesu FT-857 main board original jumpers based on different radio type

An interesting project of the popular IW3HEV antenna analyzer in and embedded solution by PA3CKR.

Radio Club ON4GDV, home page of Gang De Verviers, located in Belgium

VSP Manager is a software program that creates serial port pairs which allows software programs to talk to each other using Cat commands. This virtual com port emulator is offered FREE to Ham Radio Operators.

This online microstrip patch antenna calculator determines the length and width of a microstrip patch antenna for a given frequency

Open source software designed for the ICOM IC-R5 receiver. Linux, MacOS X and Windows

Promoting interest in DX to the state of Arkansas and the world.

Hjemmesiden til Follogruppen av Norsk Radio Relc Liga

Antique Radios of all kinds plus an operating ham station

Article on mobile antenna mounting methods by Firestik

Description, frequencies and sound samples of most popular amateur radio digital modes by DG8FBV

Echolink, EQSO, Echostation, SSTV, WEFAX, PSK-31 other digital sound card modes

Information and tutorials about all aspects of radio and electronics including propagation, ham radio, electronics, radio history, etc

Python implementation of CAT system for Yaesu FT-817ND

A proven and practical approach to dealing with RFI from grow lights and more.

WI ham club partecipate in Field Day, sponsers an annual Swapfest held in August, and provides various repeaters.

A Unique VHF Antenna with gain over a J-Pole Jose I. Calderon, DU1ANV

The object of Danish DX Group is to attract DX-interested radioamateurs in a closer co-operation

A small program to simplify changing messages in the Expanded Spectrum Systems Freakin' Beacon controller. The program makes it easy to modify an existing message or to have multiple messages available in different files ready to program into the beacon controller.

Details Allied Wire and Cable's extensive product catalog, focusing on its role as both a distributor and manufacturer of specialized wiring solutions. The resource highlights the availability of electronic and electrical wire, various cable types, tubing, and pre-assembled cable solutions. It also specifies their capability in **custom cable design**, addressing unique requirements for specific applications. The site presents information on flexible cable options and a broad spectrum of wire and cable specifications, catering to diverse industrial and technical needs. It outlines the company's capacity to provide tailored solutions beyond standard off-the-shelf products, emphasizing their engineering and manufacturing expertise. Key offerings include **coaxial cable**, connectors, and general wiring components, positioning the company as a comprehensive source for connectivity infrastructure. The content implicitly supports applications ranging from industrial automation to specialized radio frequency installations.

The South Brevard Amateur Radio Club is based in the Melbourne, Florida area and provides volunteer communications services to the public and provides a common organization for amateur radio operators in the south Brevard County area to operate under.

Details the Northern Amateur Relay Council of California (NARCC) as the regional coordinating body for amateur radio repeaters operating on the 10-meter band and above. It outlines NARCC's function in managing frequency allocations to minimize interference and ensure efficient spectrum use across Northern California. The resource specifies that NARCC operates in cooperation with the FCC and ARRL, indicating its recognized authority within the amateur radio community. The organization's role centers on repeater coordination, a critical aspect of VHF/UHF operations where multiple stations share limited frequency segments. It highlights the support received from local amateur radio operators, underscoring a community-driven approach to spectrum management. The site serves as a primary reference for hams seeking to establish or operate repeaters within the designated service area. NARCC's activities directly impact the operational landscape for _VHF_ and _UHF_ enthusiasts, providing essential guidelines and coordinated frequencies. This ensures orderly communication and prevents conflicts, particularly in densely populated areas of Northern California.

WRAASE Slow-Scan-Television (SSTV) commercial windows software, need an external hardware, SC-4 to work.

CB Radio guide by International Radio Dx Group. Only available for members of this group.

The widest range of stocked components for the electronics, electrical and mechanical engineer.

American Radio Relay League

Here are some lengths and spacings for various direct connect beams.

Homebrew a 2 meter square dipole antenna

Official ADIF Site. ADIF is an open standard for exchange of data between ham radio software packages available from different vendors.

In this article, the author discusses the importance of good transformers for Beverages, especially for common-mode isolation. The author recommends #43 ferrite for the transformer, and provides the turns required for different core types. The author also recommends using lower permeability ferrites for better performance at lower frequencies.

Article about types of materials that make the best earth grounding systems

In this youtube video G8GKC M0KKW and 2E0IAJ from Icom UK give a global overview of the ICOM IC-7300 HF 50 70MHz Software Defined Radio transceiver

Article on number stations

The _National Contest Journal_ (NCJ) serves as a dedicated resource for amateur radio contesters, providing in-depth articles, operational strategies, and technical insights. Published bimonthly by the ARRL, it covers a wide array of contesting topics, including antenna systems, station optimization, operating techniques, and rule interpretations for major events like the NA Sprint and various QSO Parties. The journal aims to enhance the competitive edge of participants across all skill levels, from casual operators to serious multi-operator teams, by sharing experiences and data from high-scoring stations. NCJ content frequently includes detailed analyses of contest results, offering breakdowns of scores, participant statistics, and comparisons of operating strategies. Readers can find practical advice on improving their contest performance, such as optimizing logging software usage or maximizing **run rates**. The journal also features columns on specific contest modes like RTTY and provides updates on rule changes and upcoming events, helping contesters prepare for future competitions and achieve better results, often leading to **top 10** finishes in their respective categories.

WB4WOR Propagation Beacon on 6 and 10 meters Jointly Owned and Operated by the Broadcast Packet and Repeater Group and Piedmont Amateur Radio GroupRandleman, NC USA

An off centre fed dipole, with 10 feet of vertical radiator. It needs no tuner on 40m, 20m and 10m by M0UKD

Italian page about a home made a 1 to 40 balun with pictures and measurements on HF bands.

For amateur radio operators engaged in **radio direction finding** (RDF) and **transmitter hunting** (T-hunting) activities, this resource provides a catalog of printed circuit boards (PCBs) for constructing various DF and foxhunt-related projects. The offerings include PCBs for 80-meter fox transmitters and receivers, UHF fox transmitters with audio recording capabilities, and several designs for general-purpose radio direction finders. Specific projects like the "Simple 80M ATX-80 Transmitter" and the "N0GSG DSP Radio Direction Finder" are listed, along with attenuator boxes and specialized components for Doppler DF systems. The catalog details PCBs for projects published in prominent amateur radio magazines such as *73's*, *CQ*, *QST*, and *PE*, indicating their origin and design pedigree. For instance, the "Montreal Fox Controller" is sourced from the *Homing-In* column by Joe Moell, K0OV. The resource also lists components for advanced Doppler DF systems, including main boards, LED display boards, and antenna switch boards, with options for programmed PIC microcontrollers. Pricing for each PCB is provided, allowing hams to acquire the necessary components for their DIY RDF endeavors.

This publications page lists articles on surface mount devices, amateur radio, soldering, shunts, and measuring large direct currents.

The magic "T" combiner is a very useful device. It can provide equal voltages, equal current, or equal power to matched or unmatched loads. It is not a magic bullet.