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Mailing List for the Distribution of Dr. Tims Pirate Radio New

10 meter propigation beacon project

Quality amateur radio transformers and electrical supplies

Project to build sets of band pass transmitting filters for reducing the interference between HF transceivers operated in close proximity

Personal Blog devoted to ham radio topics,homebrew,antenna,satellite and other projects

Satellites and Oscar 40, Microwave and ATV

AM stereo receivers are available, with technical descriptions of modulation and demodulation, as well as listing of known AM stereo stations.

The Double 5/8 is a natural extension of the Single 5/8 and uses a 5/8λ element for both the top and bottom radiators.

Calculating the length of a resonant square quad loop

Phased wire vertical antennas for 40 meters band

VE3BDB's personal page serves as a dedicated resource for members of the Radio Amateurs of Canada (RAC) residing in the Ontario South Region. Bob Cooke, VE3BDB, previously held the position of Director for this region, offering localized support and information pertinent to the RAC's activities and initiatives within Ontario South. The page likely covered regional news, events, and specific guidance for local hams, reflecting his role in facilitating communication and engagement among the amateur radio community in that area. While the page is no longer active and Bob Cooke has transitioned from his regional director role to RAC Vice President for Field Services, its original purpose was to centralize information for Ontario South hams. The content would have been tailored to address regional concerns, promote local ham radio activities, and provide updates relevant to RAC members in that specific geographic area, directing users to the main RAC website for current information.

zLog for Windows is a freeware full-featured contest logging software that runs on Windows. It supports major international and domestic (JA) contests and is customizable to many other contests not directly supported by zLog. Features include CW keying via parallel/serial/USB interfaces, highly sophisticated TCP/IP network that allows instant synchronization of a log of an M/M station, rig control, PacketCluster connenction. By JJ1MED/AD6AJ

A mini balun 1:1 4:1 project by WV0H

Homebrew project of a windom antenna, an off center fed dipole, resonating from 10 to 80 meters

This page is dedicated to amassing information on the Tentec/Globe Wireless RX-321/RX321

Personal pages on CB radio in the SE of UK and my involvment with the Tango Echo DX group

New and used books on telegraphy, key collecting, antique radio and communication-related subjects, as well as vintage telegraph instruments

What little I know about ham ballooning by Dave Mullenix, N9LTD

Award-winning MP3 Recorder software for Windows 7 and Windows 8 will capture streaming audio without using Stereo Mix feature.

Yahoo! groups discussing kenwood TS-2000

A 144 Mhz Slim Jim Antenna, aluminum tubing version project by Mohammad 9W2WTF

Since 1935 serving amateur radio in Worcester MA

Eastern washington amateur radio group

Dragoslav Dobricic, YU1AW antennex article on influence of Boom on frequency performance and how compensate it

If you can program split-frequency memories in your dual-band radio, or your dual-band radio has two VFOs, you can work an FM satellite

This is the homepage of Kayalpattinam Ham Radio Society (VU2 KYP) - Ham Radio Society from Kayalpattinam, Tamilnadu, India

Ground Plane - 1/4 wave vertical, J-Pole, 3 Element Yagi Beam and simple antenna supports

This is the official web page of the #cq11 IRC channel on Othernet Network. It was created to help users on 11m. band.

The Yorkshire ATV group promotes the use of Amateur Television in Yorkshire, UK and runs the ATV repeaters GB3YT and GB3YX.

Learn how to start using ham radio satellites for your DX contacts, PDF presentation by Dave Long

A circuit for a 5 milliwatts super QRP morse code transceiver by VE2ZAZ

The oscilloscope simulation shown on this website is based on the HAMEG HM203-6 20 MHz oscilloscope of Hameg GmbH in Frankfurt/Main, Germany

Pre-inked - re-inkable stamps

A Co-ax Trap Dipole For 40, 30 and 20 Meters or at last that was the intention

The County Hunting software, version **6.1**, is designed for amateur radio operators focused on USA-CA Award tracking and logging. This application supports _Windows_ environments and facilitates the import and export of ADIF files, enhancing QSL management by integrating electronic confirmations via LoTW and e-QSL. The software has been updated to align with the new award rules managed by MARAC, following the discontinuation of CQ magazine's involvement. Users can visualize QSLs post-scanning and benefit from enhanced ADIF import functionality. Version 5.4 introduced accelerated county searches via FCC databases, with filters for QSL confirmations and e-QSL enhancements. The software also includes a feature for backing up and restoring QSOs by LoTW confirmations. Visual County tools have been refined, offering improved map interactions and the addition of county flags. The software supports various digital modes including FT8, FT4, and SSTV, and includes functionality for PSK250 and 60m bands. The application is multilingual, with support for Italian, English, French, and Spanish, and provides automated updates and web-based county searches. DXZone Focus: County Hunting | ADIF | Windows | LoTW

Ham radio manuals in italian and english for several makers and products

San Diego Police scanner

Two-meter and aircraft band receiver specifically designed for RDF on foot, sold by Bryan Ackerly VK3YNG

The X80 multi-band HF vertical antenna, a commercial iteration of the Rybakov design, exhibits a physical length of 5.5 meters, or approximately 18 feet, and is constructed from aluminum tubing. It operates as a non-resonant vertical, requiring an external antenna tuner for impedance matching across its intended operating frequencies. The antenna's design incorporates a 1:4 UNUN at its base, facilitating a nominal 50-ohm feed point impedance for the coaxial cable. Performance observations indicate effective operation on 40 meters, 20 meters, 15 meters, and 10 meters, with reduced efficiency on 80 meters and 160 meters due to its relatively short electrical length for these lower bands. Comparative analysis with a G5RV dipole and a half-wave end-fed antenna reveals the X80 offers a lower take-off angle, beneficial for DX contacts, particularly on the higher HF bands. Field tests conducted with an Icom IC-706MKIIG transceiver and an LDG AT-100ProII autotuner demonstrate the X80's ability to achieve acceptable SWR across 80m through 10m. The antenna's compact footprint and ease of deployment make it suitable for restricted spaces or portable operations, though its performance on 80 meters is noted as a compromise compared to full-size resonant antennas.

Cloudlog is a web-based amateur radio logging application built with PHP and MySQL, supporting station logging activities from HF to microwave. It integrates with companion tools for CAT control and automation, offering a flexible solution for managing QSO data. The application provides a self-hosted platform for amateur radio operators to maintain their logbooks, facilitating interaction with various ham radio operations. Its open-source nature allows for community contributions and customization, enhancing its utility for diverse operating preferences. Originally started by Peter, **2E0SQL**, Cloudlog was designed to enable simple interaction with the Ham Radio Deluxe logbook using MySQL.

New York's Hall Of Science Amateur Radio Club.

Fabricates baseplate components, and provides hardware kits for DIY hex beam, spiderbeam and moxon antennas.

KCAWG web site with lots of informations for local APRS operations by KU0G

Expeimenting with DSP digital signal processing on Arduino

Radio Club Argentino

A really simple LF receiving loop antenna

An homebrew Lindenblad antenna designed specifically for LEOs reception.

A 50-ohm generator feeding a 50-ohm line connected to a _quarter-wave transformer_ (150 ohms) terminated in a 450-ohm load is analyzed to understand transient behavior. The paper meticulously tracks voltage and current waves, reflection coefficients, and power levels through a sequence of events, starting from quiescent conditions. It details how incident and reflected waves combine and interact at impedance discontinuities, illustrating the dynamic changes in impedance and SWR at various points in the system. The analysis reveals that the impedance at the interface between the 50-ohm line and the 150-ohm transformer changes from 150 ohms to **64.3 ohms** after the first reflected wave arrives. Subsequent reflections cause the impedance to asymptotically approach 50 ohms, reaching **53.22 ohms** after five wave terms. The study also examines the generator's reaction to transient SWR changes, noting that a 3:1 SWR can temporarily reduce generator output to 0.75 watts, but these effects are temporary and diminish as the system approaches steady-state conditions.

Alan Applegate (K0BG) article on mobile oprtations

Tubes and antique radio buy and sell classified ads