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The following transceivers can be susceptible to damage from a strong RF field (or RF-overload) IC-746 IC-746PRO IC-756 IC-756PRO IC-756PROII IC-756PROIII n1eq explain why

80m hexfet power amplifier by W7ZOI

Maidenhead grid maps for VHF/UHF, These maps make excellent wallpaper for your contest setup.

Online javascript antenna calculator designed to give the critical information of a particular beam antenna, in this case a seven element Yagi, for the frequency chosen.

A 5-band (20m-10m) HF antenna - Just 7ft square and great for a small garden. Build it yourself for around 60 GBP.

RemoteHams.com permit to display and control transceivers all around the world

Construction of a 4 legged 20 foot Tower at vk5sw

The best way to describe a go-box is a complete amateur radio station in a box. An example is described in this article. The project describes building a portable amateur (ham) radio station, known as a "go-box," housed in a durable orange Pelican case. The go-box contains all necessary radio equipment except for external power and antennae, which are carried separately. It includes items like a Yaesu transceiver, power supply, antenna tuner, speaker, and a clock. The case is designed for mobility and visibility, with a vertical layout to allow in-vehicle operation. Future upgrades might include cooling fans, an LED lamp, and built-in antennae for better functionality in various conditions.

G8ODE antenna project, where the 40m & Short 80m antenna was deployed as a sloping wire antenna using the 10M fibre glass fishing pole and a hook on the house's gutter-board

CQiNet is a family of programs that combine Ham Radio with the Internet using Voice over IP (VoIP) technology. Two programs are currently in the family, "theBridge" and echoLinux. Thebridge is a iLink/EchoLink compatable conference bridge that runs under various versions of Unix as well as Windows. EchoLinux is a EchoLink client program for the Linux operating system.

home of the AA9PW exam practice pages.This site is designed to allow you practice for the following FCC Radio and FAA Aviation licensing exams.

Antenna data, and design note for this horizontal loop antenna resonating on 80 Meters by K0ZE

These inexpensive, easily built filters can be the buffer you need between the signals you want to hear and send and those you don't!

Demonstrates CW Decoder Logic, a freeware application for Windows Vista SP2, 7, 8, and 10, designed to decode Morse code signals. The software incorporates an optimized 80 Hz DSP filter, enabling reception of CW signals across a speed range of 5 to 60 WPM. Key features include automatic signal tracking within a 3 KHz range, real-time speed detection, and an auto squelch function, enhancing decoder sensitivity and accuracy. The application provides station selection directly on a waterfall display and includes a "Tips" feature for word annotations. It supports sending decoded text to external logging software via UDP protocol, with a logger source code example provided for developers. Configuration options allow users to set speed limitations and customize interface elements. Released initially on October 17, 2016, with subsequent updates, the program requires Microsoft .NET Framework 4.5 or higher. Changelogs detail improvements such as increased program stability, code optimizations for speed, and fixes for display issues across different Windows versions.

3 to 30 Mhz antenna analyzer schematic by YO3DAC / VA3IUL

An open source Automatic Packet Reporting System tracker based on Arduino by Javier Martin

Operating amateur radio satellites effectively requires precise knowledge of their orbital mechanics and pass times. Gpredict, a real-time satellite tracking and orbit prediction application, addresses this need by allowing operators to monitor numerous satellites simultaneously. It displays critical data such as position and pass details through various visualizations, including lists, tables, maps, and _polar plots_. Unlike many other satellite tracking programs, Gpredict introduces the concept of visualization modules. These modules enable users to group satellites and configure each group independently, offering unparalleled flexibility in how orbital data is presented. This modular approach supports tracking satellites from multiple observer locations concurrently, which is particularly useful for stations with diverse antenna setups or remote operations. Originally a GUI client for John Magliacane's _Predict_ program, Gpredict evolved to integrate its own tracking code for improved performance. The software is distributed under the GNU General Public License, ensuring it remains free and modifiable for the amateur radio community.

A project for a 144 Mhz halo antenna

In this site SWL can find many thing he needs: Contest rules and results, software, awards info and photos, forums, chat and more.

The Yaesu FNB-78 Battery plugs into the FT-897/D. It produces 13.2 VDC at 4500 mAh. The radio can hold one or two and one can be in use while the other is charging.

Log Online for XT2TT in real time

A simple to build Yagi 2 element antenna for 15 or 20 meters band by 9m2mso

Nevada has been established for more than 29 years. The company has three main divisions Radio Music Publish

Write down grid squares of your QSOs and this nice online tool will create a World map with all contacts QTH linked to your home QTH. The QSO map picture can be downloaded for resharing.

How to solder PL-259’s compiled by K1VR

If you can't get on the air from home, the Internet may provide the answer. By Brad Wyatt, K6WR. Pdf File.

Amateur radio accessories, power supplies, tvi filters, speakers, microphones, swr meters, preamplifiers, switches, cable and connectors,

The webpage provides information on a two-element Yagi antenna for 24 Mhz, created by IK4DCS. It includes details on the design and construction of the antenna.

Radio Center radiaficion, Gps, Garmin, Kenwood, Yaesu, Navilock, dealer in Spain

A slightly different 6M antenna project by N1GY, an Off center fed antenna for the 50 MHz.

HDSDR is a free SDR (Software Defined Radio) application for Windows. Common usage is Radio listening, Ham Radio, SWL, Radio Astronomy, NDB-hunting and Spectrum analysis. HDSDR (former WinradHD) is an advanced version of Winrad, written by Alberto di Bene I2PHD

a neat 1:1 50 ohm balun for use on HF horizontal wire dipoles.

Antenna that's simple, inexpensive lightwiight and easy to install

Sams Photofact downloads - Schematics and Service Manuals for Radios, Amplifiers, More

Officina Meccanica Begali has been manufacturing electro-mechanical precision components since 1960, and our line of fine keys and paddles for the ham community are a more recent addition.

SerialKey is a Freeware DOS Morse code keyboard that uses the serial port, by Jeff Rowberg (KF6RLU)

M0WYM slinky dipole setup into an attic.

Current HF band conditions online report and graphs. This page provides band condition information to CW and SSB Contesters. It can also be of benefit to other Radio Amateurs to determine band condtions for Nets and casual QSO

An introduction to PSK31, MT63, and Hellschreiber, John DeGood NU3E Trenton Computer Festival in PDF

AM loop antenna for 75/80 meters band

STSORBIT PLUS, usually known as STSPLUS, will track the space shuttle or any satellite for which orbital data (TLEs) are available. A brief description of the program and several screen capture examples follow the links for downloading the program files.

Dedicated to building bridges between the EME, SETI and Radio Astronomy Amateur Interest Groups.

A potpourri of 160-Meter vertical antennas and modeling issues, inverted-L, 3-element parasitic array, 1/4-wavelength monopole

QRP kits

Publication for the video aspects of ham radio

The DSP Satellite Transceiver is a conceptual transceiver designed as a dedicated unit for amateur satellite operators. The initial concept was brought about by the lack of satellite functionality on modern amateur radio transceivers, and the specialized requirements of the ham radio operator who utilizes OSCAR amateur satellites.

Members only techical pages about Sloper antennas

Faqs on six meters band, designed to help encourage hams to use and enjoy this band

Demographics of amateur radio operators

An Easy way to Monitor RF, AC or DC current with one instrument by W5JGV