Search results

Home page of PA3BTL with information on Linux, packet radio, sattellite keppler data links, Proxim RangeLAN2 2.4 GHz radio's, Lucent WaveLAN 2.4 GHz radio's and link to LXE homepage

Random Length Wire Antennas by WOIPL

An article on RFD antennas, resonant feed-line antennas

1500 watts of RF output on the 70cm band requires robust amplifier design, a challenge addressed by this project featuring the GS-23b / 4CX1600U Svetlana tube. The resource details the construction of a high-power UHF amplifier, providing insights into component selection and layout necessary for stable operation at these frequencies and power levels.

Use these forms to manually enter log data to produce a Cabrillo file and submit it to a contest sponsor. The forms are designed for contesters who used paper logging or logging software that doesn't produce a Cabrillo file.

A well documented PDF document containing picture sequence taked during the repair of an Icom IC-7700 HF transceiver power amplifier module

A test and comparison of real attenuation of N-type connectors and PL-259 connectors on UHF bands, domonstrating that connectors are almost equivalent.

A simple charger designed for charging 12 V sealed lead acid batteries, used by radio amateurs for portable operation Amp-Hr Class used by radio amateurs for portable/emergency operation.

This article describes firmware and minimal hardware for encoding and decoding of on-air CW using an terminal/modem based on these controller boards.

eHam users reviews on the TS-480SAT

Presents the **BayCom** packet radio system, detailing both its hardware and software components specifically designed for amateur radio use. The resource offers insights into the technical specifications and operational aspects of the BayCom modem, which has been a staple for many German packet radio enthusiasts. It covers the integration of these components within a typical amateur radio station setup, enabling reliable digital communication. Further, the site provides a broader context by including general information about the German packet radio network. This encompasses network topology, operational protocols, and historical developments relevant to packet radio in the region. Users can find details on how to connect to and utilize the existing infrastructure, fostering participation in the local digital amateur radio community.

a Podcast for amateur radio enthusiasts... by jeff davis, ke9v

Isolating traceiver and your computer with an opto-coupler component

Signal source circuit for 2.4 GHz by sv1bsx

How to connect a mose key to a pc using the standard RS232 serial ports by F8EHO

eHam reviews for the Ameritron AL-811 linear amplifier

A Bluetooth Headset Interface with built-in PTT for Amateur Radio by Bertrand Zauhar, VE2ZAZ

DG8SAQ Vector Network Analyzer and VNWA multiband antenna analyzer

By I0GEJ Weblog - Lidio Gentili

This website explains coverage and construction for our repeaters. Includes useful links and an insight into the Ham community in Rhode Island

CAARA, an ARRL affiliated club, operates the 2 meter W1GLO repeater on 145.130 MHz

Cushcraft MA5B 20 / 17 / 15 / 12 / 10 Meter Beam Antenna assembly and installation manual

This project describes the construction of a real CW QRP keyer with a small microcontrolle

The A QRP Club is a small group of Amateur Radio enthusiasts who enjoy building, operating and (mostly) talking about Low Power radio communications, equipment and systems.

Project Condor16 VHF transceiver

Wrexham is in North Wale's and our club is open to all radio fans

Pagina personal de Radioaficion, Satelites, Antenas, Electronica y Aviacion

Local radio club for Harlow in Essex, England

eham users reviews of the Kenwood TS-570S(G) series

Adapting a Wouxun/Kenwood USB cable as a Yaesu FT-817 FT-857 FT-897 CAT connection

Running 10 and 6 meters beacons, 6 m and 70 cm fm repeater from Melbourne, Australia

A bazooka coax antenna for 40 meters band design by CA6TYS

Sharing the stories of Pacific radio, an on-line archive and resource. Includes searchable databases, articles, images, store, newsletter, research, advocacy, publishing, radio heritage documentary production and more. Free membership worldwide.

Audio Repeater is a windows application tha allows you to transfer, transmit, sounds from an input audio endpoint or device to an output one Playback. Audio transfer can be performed in any PCM audio format supported by Windows. KS version communicates directly with audio driver, bypassing all additional Windows audio processing

ON7YD narrowbands modes on 136 Khz

Online in RealAudio and Windows Media formats, with multiple language shortwave schedules, and instructions for receiving Australian satellite radio and TV (AusTV).

Several bash scripts are provided to automate common amateur radio tasks on Linux and FreeBSD systems, addressing the need for quick access to specific data without navigating web interfaces. These utilities include `call` for fetching US callsign details from callook.info, `qth` for obtaining address information for US and Canadian callsigns, and `grid` for determining grid squares based on license addresses. Each script is designed for command-line execution, allowing for single lookups or interactive sessions, and emphasizes a KISS (Keep It Simple, Stupid) programming philosophy. Another script, `au_kp.sh`, is tailored for weak signal VHF operators, fetching and displaying the NOAA 30-minute Aurora forecast and GFZ Space Weather Kp index data. This script generates static images, requiring re-execution for updates, and is intended to be run as a clickable desktop object for real-time space weather monitoring. It helps operators track propagation conditions, especially during solar cycle peaks. Beyond bash scripts, the resource offers a PHP/web page `fortune` implementation, including Henrik Aasted Sorensen's PHP script, sample HTML/CSS, and a HOWTO guide for creating fortune files. W3DHJ provides several amateur radio-themed fortune files, such as "Ham Humor & Wisdom" with 354 entries and "VHF Rover Humor & Wisdom" with 223 entries, along with other general humor and wisdom collections. These fortune files are designed with embedded HTML for web page display and are refreshed monthly, offering a total of 21,400 entries.

How to measure the characteristic impedance of a unknown transmission line using MiniVNA

Home for dutch speaking radioamateurs, wordwide. We also provide information about our hobby in english and other languages. Hamradio guide for visitor to Holland

Maintained by Larry Tree Tyree N6TR

Yaesu VX-8R eham users reviews

Weak Signal Propagation Reporter Network Map and Database of WSPR data

OM3CPH Universal HAM radio/generator DDS Unit with AD9850 or AD9851

Operating the _Icom IC-746_ HF/VHF transceiver often presents specific technical questions, and this resource compiles a comprehensive Frequently Asked Questions (FAQ) document in an ASCII text format. It details common inquiries and solutions related to the rig's functionality, accessories, and potential modifications. The content is structured into distinct sections addressing general information, power supplies, antennas, microphones, keyers, amplifiers, TNC integration, and optional IF filters. The FAQ provides practical guidance on topics such as configuring the internal automatic antenna tuning unit (ATU), selecting appropriate power supplies, and understanding microphone pin-outs. It also delves into advanced subjects like computer control via CI-V, wiring for PSK31 operation, and troubleshooting common issues like low S-meter readings on 2m FM or loose tuning shafts. Specific questions cover the installation of optional IF filters, comparing Inrad versus Icom filters, and optimizing filter combinations for various modes. Furthermore, the document outlines various hardware and firmware modifications, including those for increasing monitor volume, replacing LCD driver transistors, and implementing a "poor man's TCXO." It even touches upon untested modifications, such as replacing PIN diodes in the demodulator. The FAQ also lists manual errata and discrepancies, offering a robust knowledge base for IC-746 owners seeking to optimize their station or resolve operational challenges.

Repeater, an independent Dutch ATV magazine

Amateur radio contest station K1TTT

Eham users Yaesu VX 5R review

FLMSG is a simple forms management editor for the amateur radio supported standard message formats. Form data can be transferred between computers either using standard internet email or via radio frequency broadcasts typically made by an amateur radio operator on your behalf.

Performance of an unloaded ground mounted vertical as a multi-band HF antenna.