Search results

Multimode suite, feature logging, Internet interface to CXCluster, Smart multi-mode controller software, contest, APRS, and PSK31 via Sound card. Free and Commercial version available.

Solar Flux reports, Current Alerts and Warnings from NOAA, 27 day forcast from NOAA, charts reflecting the past 7 years Solar cycle summary charts from NOAA

A 40 meter band two elements yagi beam with a 6mt boom with pictures and drawings

SSTV software is now available for the Macintosh computers, for the first time.

A moxon antenna for 28 MHz

Radio programming programs for YAESU and ICOM handheld transceivers. VX-7 Commander, VX-2 Commander, VX-5 Commander, VR-120 Commander, and IC-R2 Commander. All software on this site is designed to work on Windows 9x, ME, NT, 2K, and XP.

Notes on building a basic wire vertical or horizontal antenna for 160 meters band by L. B. Cebik, W4RNL

Method of storing my portable wire antennas.

BV is a professional software for QSL Management and Label/QSL Printing - developed since 1989 by Bernd, DF3CB. It is mainly designed for the contester and QSL manager with high QSL quantities but useful for all other QSL'ing purposes as well. Freeware

This is a picture of a schematic diagram of a multifunctional interface for Yaesu FT-8x7 Series Transceivers. It will work for Yaesu radios like FT-897 FT-857 FT-817

HF Ham Radio mobile operation antennas manufacturer, W6HIQ, HA5CMG, VE7BOC, HF mobile antennas, screwdriver antenna, coils and filters.

How to make a wifi cantenna using a mini ravioli can

F1MDT freeware remote control for yaesu VR-5000 in french

A DIY discone antenna project made to improve receiveing performance of an RTLSDR receiver.

2-Element parasitic Yagis for the Shortwave-Bands 10m-30m

Old Time Radios ! a good resource to old time-radio amataurs

Virtual Audio Cable software allows you to transfer audio streams between applications and devices. Windows commercial software, offer a trial version limited to 3 virtual cables.

Controlling an antenna tuner with an arduino board. The project includes movies, explanation and the arduino code

The radio spectrum in usa, PDF File representing the united stares frequency allocations in graphical mode, dated 2003

A 20 meter quarter wave vertical antenna by jerry sevick W2FMI QST Article

Freeware antenna software that lets you see what the polar diagram of your rotatable beam actually looks like where it is operating. With PolarPlot you can measure the polar diagram of the antenna and check for abnormalities - compare plots taken before and after changes to the design or location - check the -3dB beamwidth - look at the front to back ratio - see the size and position of the sidelobes.

The H-Pole is a vertical multiband wire antenna for 160-10 meters bands

Downloadable DOS program for propagation prediction for the serious contester.

17 Meter 3 element TA33 junior mono band yagi antenna conversion project by K6TC

SDR Software defined radio kits, genesis SDR kits

Voice Shaper is a freeware windows speech pre-processor for SSB transceivers. It receives the voice signal from the microphone connected to the soundcard, and sends the processed audio back to the soundcard in real time by Alex Shovkoplyas, VE3NEA

A free application that captures DX and WWV spots from up to 5 internet clusters and a local packet cluster. DX Spots are merged and stored in a Spot Database on your PC, enabling you to monitor, sort, and filter them in real time; known LotW participants are highlighted, as are needed stations. WWV spots are plotted to show SFI, A, and K over the last solar revolution.

What is NVIS Near Vertical Incident Skywave. This article on NVIS (Near Vertical Incidence Skywave) explores its role in short-range HF communication, covering 0-200 miles. NVIS utilizes antennas with high radiation angles and frequencies below the ionospheric critical frequency to achieve reliable local contact. He details optimal antennas, like low dipoles, and practical tips for maximizing NVIS performance, emphasizing its advantages such as reduced noise and independent operation without repeaters. However, challenges include frequency sensitivity and the need for appropriate antenna setups at both ends for effective communication.

DXMaps.com presents a dynamic, real-time mapping service for amateur radio DX spots, integrating data from traditional DX clusters, _PSK Reporter_, and WSPR networks. The platform visually plots global QSO and SWL activity, enabling users to observe propagation conditions across various bands, from 2200m to >450 MHz. It offers distinct overlays such as the magnetic equator, gray line, moon footprint for EME, and VOACAP propagation predictions, providing a comprehensive view of radio wave behavior. The service allows granular filtering of displayed spots, including options to show only DX-Cluster data, PSK Reporter activity, or WSPR signals. Users can refine the map view by selecting specific bands (e.g., 160m, 20m, 6m, 2m), limiting spots to the last 15 minutes, or displaying only contacts exceeding **2600 km**. Additional features include the ability to toggle grid squares, aurora forecasts, and various amateur radio zones (CQ, ITU). Distinctively, the resource updates automatically every minute, ensuring current propagation intelligence without manual refresh. It also supports specialized views for EME, ionospheric scatter, and aircraft scatter, alongside FM DX and APRS activity. The platform emphasizes the importance of accurate locator information in DX spots to enhance data quality and offers a user manual and FAQ for guidance.

"ARES trains and organizes Hams to provide emergency communications to ""Served Agencies"" such as FEMA, National Weather Service, Red Cross, Salvation Army, Hospitals, and others. This site describes ARES goals and methods and structure."

A **90-foot tall** top-loaded vertical antenna for the 160-meter band is detailed, constructed from aluminum irrigation tubing. The design incorporates four sets of four guy wires for structural stability, essential for an antenna of this physical size. This _monoband_ vertical is optimized for low-band operation, providing a robust solution for DXing and contesting on 1.8 MHz. The document includes specific construction methods for assembling the aluminum irrigation tubing sections and securing the guy wires. While a full NEC model is not explicitly provided, the physical dimensions and construction materials are sufficient for replication by experienced builders. The antenna's height and top-loading configuration are critical for achieving efficient radiation on 160 meters, particularly in minimizing ground losses.

Program designed to do spectral analysis and real-time audio filtering on reception of audio signals for EME, VLF, SETI applications. Offer support for MTHELL, QRSS, DFCW, NDB, WSJT by I2PHD

Eight Bands On One Coax by kh2d

KD9JQ 2 meter GaAsFET preamplifier by KD9JQ

This page explains how to construct high-Q inductor coils.

Here is a circuit that will resonate a short whip antenna for the HF Bands.

Allow you to create Tower Coverage Maps for any geographical area in the entire world. Maps are based on region and topography, taking into account for hills, mountains and trees. Commercial software allowing a free map trial

Article and comparison between bazooka antennas and dipole, taking care of effieciency and bandwidth

Comercial windows sound/voice activated recorder, will start recording when sound is detected. Recording to compact MP3-files. 30 days trial available.

N2DS home made loop page collection.

Kenwood TS-830 manual, tips and fixes

Balcomy antenna modification to cover top bands, by Harry Lythall SM0VPO

The **NW3Z** optimized wideband antenna designs, originally presented at Dayton 2001, detail Yagi configurations for the 20-meter, 15-meter, and 10-meter amateur radio bands. This resource provides access to the design files, likely containing critical parameters such as element spacing, element lengths, and boom dimensions, which are essential for replicating these directional antennas. The designs focus on achieving wide bandwidth, a desirable characteristic for contesters and DXers operating across a significant portion of each band. The content specifically references "nw3z-Antenna-DesignsDownload," indicating that the core information is available as a downloadable file, presumably in a format suitable for antenna modeling software or direct construction. Such files typically include **NEC models** or similar data, allowing for performance analysis and optimization before physical construction. The emphasis on "optimized wideband" suggests design considerations for SWR bandwidth and gain characteristics over a broader frequency range than typical narrow-band Yagis. The resource serves as a direct source for specific, proven antenna designs from a known amateur radio antenna designer, offering practical data for hams interested in building high-performance Yagi arrays for HF.

A free to download and print, amateur radio station log sheet in a paper US letter format

A homemade 16 foot falling derrick to tilt up a 50 foot high, 18 inch wide Glen Martin aluminum tower by N6RK

HamFax is an application for sending and receiving facsimiles in amateur radio and for receiving public facsimile broadcasts like weather maps. Supported interfaces are sound cards and the SCS-PTCII from Special Communication Systems.

Basics and principles of the HB9CV antenna by Rudolf Baumgartner. This antenna join electric advantages of the two elements direct feeded aerials with the mechanical advantages of the Yagi antennas, in French.

This 80/160 meter antenna is constructed from six 12 foot aluminum tubes to form a slip-up mast antenna some 60 feet high by K0RWU

Standard diplexer design is based on singly-terminated Butterworth filters.

10-12-15-17 meter band yagi antenna