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Ham Radio and other CD-Roms, software and shareware. -
FT-1000MP Automatic Band Selection Interface Bob Wolbert, K6XX -
General electronic topics on interfacing to PC soundcards by epanorama.net -
While you are enjoying your favourite scheduled SWL program, DX Net, or W1AW Bulletin, MacLoggerDX is combing the internet looking for the latest Hot DX Spot -
A small portable antenna tuner for HF and VHF bands by ON6MU -
This online tool will convert any street address into latitude and longitude and vice-versa by executing queries to several online mapping services like googlemap geocoder maporama terraserver and more by Stephen P. Morse -
DF3CB site, contesting, and software BV is a professional freeware software for the QSL Management and Label/QSL Printing under Windows developed and distributed by Bernd Koch, DF3CB, since 1989. It is mainly designed for the contester and QSL manager with high QSL quantities but useful for all other QSL'ing purposes as well. Includes logging features -
Manufacture microprocessor based repeater controllers -
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The following frequencies are assigned to datacommunications in the HF bands within the UK By RSGB data communications committee information. -
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Based on DL6UW Yagi antenna's design-formula The forward gain is 13.6 dBi (about 11.5 dBd) and it's pretty small, about 1,5 m in length -
A project for a multiband HF windom antenna by VE2CV and VE3KLO -
If your local repeater has got you singing the PL tone blues, then read on. For less than $10, an inexpensive PL tone generator can be constructed that will bring new life into that old non-PL rig. -
Design that can be mounted on a mast underneath an existing beam. -
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A self supporting vertical antenna for 80 meters by W9OY include pictures and construction details -
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Vhf Ufh transceivers, repeaters, Telemetry Scada Systems and accessories -
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Local and DX contacts from tight spaces, it works from 40 to 17 meters -
Map of italy with amateur radio prefixes and grid squares -
Understanding high-frequency (HF) skywave propagation is crucial for amateur radio operators seeking to optimize long-distance communications. This resource details the fundamental principles of HF radio propagation, including the properties of electromagnetic waves, the characteristics of various HF bands, and distinct propagation modes such as skywave, ground wave, and line-of-sight. It places significant emphasis on the ionosphere's pivotal role in refracting HF waves, explaining how solar activity directly influences ionospheric conditions and, consequently, propagation paths. The resource integrates real-time monitoring capabilities, featuring dynamic charts and data from DX clusters, WSPRnet, and the Reverse Beacon Network, which allow users to track current band activity and propagation conditions globally. It also delves into advanced topics like Near Vertical Incidence Skywave (NVIS) and gray line propagation, providing insights into ionosonde data and various propagation prediction models. The site presents a detailed analysis of solar-terrestrial interactions, geomagnetic indices, and space weather phenomena, illustrating their direct impact on HF communication reliability. Practical tools and applications are highlighted, including real-time QSO planners, online Maximum Usable Frequency (MUF) maps, and alerts for solar flares or geomagnetic storms. The guide systematically breaks down complex concepts into accessible chapters, offering a structured approach to learning about ionospheric regions, diurnal and seasonal effects, and the interpretation of propagation indicators like foF2, MUF, and Lowest Usable Frequency (LUF). This makes it a robust reference for hams aiming to deepen their technical understanding and improve operational effectiveness. -
Fractal Antennas are a new generation of multiband antennas for wireless communications. Based on a new design concept, fractal technology. -
SWIFT WX Version 2.0 combines a powerful GIS mapping engine with real-time weather maps and storm tracking data making it the most comprehensive storm tracking application available. -
A Comprehensive roundup of the most popular QRP transceiver kits on the market in recent years in PDF format -
A popular 2 meter antenna returns in an improved, easier to reproduce form, 2008 QST article -
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An easy to build multiband trapped dipole that can work well on short low bands for skip contacts -
NDBfinder allows you to use your PC and soundcard to receive, detect, identify and log NDBs (Non Directional Beacons used for maritime and aeronautical navigation) -
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A comprehensive collection of DX information consisting of news, audio files, station profiles, equipment articles, discussion forum, DXpedition reports and logs for mediumwave, shortwave and FM DXers. -
A different approach can help you optimize attic-bound aerial by W6HPH -
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ScanNow is a computer scanner control program for AR8000 -
Demonstrates the essential steps for winding **toroidal cores**, a fundamental skill for amateur radio operators engaged in homebrewing and kit building. It addresses the critical aspects of selecting the correct core material and wire gauge, emphasizing the importance of precise turn counting and consistent winding tension to ensure optimal circuit performance. The resource details methods for preparing the wire, including techniques for safely removing enamel insulation from leads using flame, sandpaper, or a solder pot, and provides guidance on tinning the exposed wire. Explains the process of mounting the wound toroid onto a printed circuit board, highlighting the need for careful lead placement and secure soldering to prevent shorts and ensure mechanical stability. It also offers a practical formula for calculating the required wire length based on the desired number of turns and the specific **toroid** size, referencing common core types like T-50 and FT-240. The guide stresses the importance of verifying the inductance of the wound component, often using an inductance meter, to confirm it matches design specifications. Provides practical tips for handling multi-filar windings and managing short lead lengths, which can be particularly challenging. It underscores the necessity of meticulous attention to detail throughout the winding and installation process to achieve reliable and efficient RF circuits. -
Satellite Tracking/Orbital Prediction Program an open-source, multi-user satellite tracking and orbital prediction program written under the Linux operating system by John A. Magliacane, KD2BD. PREDICT is free software -
Free windows basic and simple CAT program specifically for the Yaesu FT-857 radio. It provides an unlimited memory storage area which resides on the client side. -
Firenze section of Associazione Radioamatori Italiani -
How to improve the gain of your 5 element Tonna yagi for 50 MHz by roughly 3 db! -
Circuits, pictures and data about toroids, tubes and home made power amplifiers -
Rigpix database pictures and specifications of Yaesu FT-857 -
Compact HF antennas for home and mobile use, compact HF maritime antennas, manufactured by multi-band antennas -
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QRP Amateur Radio Club International home page. Your source for QRP information and news. -
Long Waves, Short Antennas, designing antennas for MF and LF communications -
A 1-60 MHz coverage VFO with built-in amplifier and variable output level from 0 to 4V p-p. -
Free PCB software is a snap to learn and use. For the first time, designing circuit boards is simple for the beginner and efficient for the professional. -
