Search results

Displays amateur radio grid squares worked from third-party logging programs, providing a visual representation of contacts on a world map. This Windows application uses colors to differentiate up to four bands concurrently, calculating the total number of grid squares worked per band. It reads plain-text log files, including fixed-width, character-delimited, ADIF, and Cabrillo formats, dynamically updating the map as log files are saved during contests or general operation. Primarily targeting **VHF** and above operators, WorkedGrids aids in grid square collection for contesting and awards. The software offers a fixed-resolution continental viewpoint, zoom-in capabilities, and supports printing or copying the map to the clipboard. It operates on Windows 95 through Windows 11, requiring minimal CPU and RAM, and features a non-invasive installation. The program has undergone several updates, with version 7 released on March 3, 2024, addressing minor fixes and improving stability.

RailScan: A Place To Discuss All Aspects Of North American Railroad Radio Communications, Past Present and Future.

Eham reviews about Icom IC-V8000

Specializing in antique, vintage and tube radio repair, all makes. Transistor radio repair- from the 50's to the present. Free estimates.

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

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

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.

A 40 meter NVIS beam antenna by W4NVK

eham FT-1000MP MR V Field product review

Review of the Yaesu VR5000 general coverage receiver

eham users review of the Cushcraft r5 vertical antenna

An RSGB article on end-fed wire antennas and the W3EDP alternative.

Article showing how I've made a mains filter to reduce EMC in the electricity supplying my shack. I've used a type 31 Fair-Rite ferrite core and the video shows how this performs on 160m through to 40m.

HamRadioBug.com the new home for Electronic Equipment Service. Yaesu high-end series SSB/CW transceiver repair

Raising large Yagi antennas can be a challenging project. A trolley system will make the job a lot easier

Using a full-size antenna and a reasonably sensitive headphone, this simple switching mixer will produce an amazing abundance of signals on 80m.

Eham users reviews for Yaesu VX-150

This article is designed to be an introduction to the terms and basic mechanics of propagation methods that are to be found on the HF and VHF bands.

This is an Android application used to remotely control several HAM radio Web SDR or any CAT enabled transceiver

Amateur Radio Service Center, quality repair of Kenwood and Some Icom equipment, TX USA

Notes and details on repairing Traps on Cushcraft A3S

Transmission Line Details. This utility program shows the impedance and SWR at both ends of a transmission line and the details of power loss in the line. It includes characteristics for over 40 built-in line types. You can modify these values to see how small changes affect the results or to specify custom lines. All program inputs may be changed directly or you can use spin buttons to make the changes. If you are using a moderately fast computer you can hold down a spinner and "watch the movie" on the charts as the results are recomputed. By AC6LA

Common problems and improper operations of Yaesu FL 2100 RF power amplifier

French CW radio club

Eham users review of the Yaesu FT-950

Geographical atlas using radial projection

personal home page

The website for the Yucaipa Valley Amateur Radio Club located in Southern California.

Scanning railroad communications in the toronto area

By Prof. T. K. Mani - VU2ITI

Summits on the Air is an exciting new award scheme for radio amateurs which encourages operation in mountainous and wilderness areas. The sceme is designed to grow into an international awards.

Eham users reviews of the hustler 5 btv HF vertical antenna

Repair of a 756pro that was powering up always on TX due to some damage in the ACC1 connector area

Antenna Analyzer AIM4170 by W5BIG from Array Solutions

This article compares two commercial vertical antennas for the 4-meter amateur radio band: the Watson WVB-70 half-wave and the Sirio CX4-71. The Watson measures 2.03m in length, costs around £40, and exhibited adequate performance but required additional waterproofing after rain affected its VSWR readings. The longer Sirio CX4-71 (3.02m) performed noticeably better, delivering signals approximately 2 S-points stronger than the Watson. The Sirio demonstrated high build quality, a stable 1.2-1.4:1 VSWR, and weather resilience, though minor VSWR fluctuations were observed during rain and frost. Both antennas are half-wave designs requiring no ground plane radials.

Eham.net review of ICOM IC-2720H

A web page for uhf & hf cb operators & scanner hobbtists

The resource, initially identified as "Alabama Radio," a dealer of amateur radios, antennas, CB equipment, scanners, and power supplies in Eastern Alabama, now redirects to a domain brokerage service. The original intent was to provide a commercial outlet for Ham Radio operators and CB enthusiasts seeking new equipment and accessories. This would have included transceivers, antenna systems, and various station components. However, the current content at the URL is _Startup Domains_, a platform for buying and selling premium .COM domain names. This shift means the resource no longer serves the amateur radio community directly. Instead, it focuses on digital asset transactions, with no mention of radio equipment, _DXing_, or _contesting_ activities. The original description of a regional radio dealer is no longer applicable to the live content.

Mountain Thunder CB Radio Group is a group of CB SSB operators that started in the Pacific Northwest, Washington State.

Spanish web site

Manufacturer of custom belt buckles,coffee mugs,t-shirts,sweat shirts,maine gifts,name tags,call tags and awards for police, fire, sheriff, ham radio and amateur radio clubs

Most people are not familiar with antenna tuners and what a antenna tuner actually does.

Protecting the ham radio stations, using a good ground system

Definition of smoothed sunspot number and R12 index

We are committed to constantly improving our solutions in areas of GPS System, GPS Receivers, GPS Antennas, GPS Dataloggers, RF Modules, Wireless Security Systems, Automatic Vehicle Location (AVL) for real time and passive tracking

Ham radio blog dedicated to military radio equipment by EA3FOW

Building Eggbeater II Omni low Earth orbit satellite Antennas for 70cm by ZR6AIC

Allows you to automaticaly upload ARGO screen captures to your webpage in a convenient way. by ON7YD

Classic Radio Restorations specialize in professional repair and restoration on all makes and models of antique radios and vintage phonographs. Since 1978.

The ZS6BKW multi-band antenna, an optimized variant of the classic G5RV, is presented with detailed construction and tuning instructions. This resource outlines the antenna's design principles, which were developed by _Brian Austin (G0GSF)_ using computer programs and Smith charts to achieve optimal dimensions. It provides specific guidance on calculating and adjusting the lengths of the radiators (L1) and the matching ladder line (L2), emphasizing the critical role of velocity factor (VF) in achieving resonance. The article includes a step-by-step procedure for empirically determining the VF of ladder line using an antenna analyzer, ensuring accurate physical lengths for the matching section. It details the tuning process for the radiators, offering practical tips for incremental adjustments to achieve the best SWR curve. The resource presents SWR measurement results obtained with an _AIM-4170C_ analyzer across multiple bands, alongside predicted SWR graphs from an AutoEZ model. It confirms successful contacts on 80, 40, 20, and 17 meters, including a **17-meter DX contact** to Italy. EZNEC and AutoEZ models for the ZS6BKW antenna, covering 80 through 6 meters, are provided for download, allowing further analysis and customization. The document specifies component details, such as the use of Wireman 554 ladder line and #14 AWG THHN copper wire, and discusses the antenna's performance characteristics, noting high SWR on 15 and 30 meters but successful tuning on 6 and 80 meters with an external tuner.