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A Friendly Ham Club!

An ARRL article collection about influence of radio frequency with pacemakers and other similar medical devices.

Turkish ham radio stations with links, and IOTA info, in turkish

Platinum coast amateur radio society (pcars) w4mlb - melbourne florida, pcars provides hf, vhf, and uhf communications for any police fire and rescue emergency

ICQ Podcast The home of the Premier Amateur Radio Podcast, podcasts, forum and Amateur Radio News and views.

NewLogOSH is a logging application for amateur radio operators, featuring integrated support for various digital modes including FT4, FT8, RTTY, and PSK. The software incorporates DXCluster connectivity and radio interfacing capabilities, allowing for seamless operation with transceivers. Its database is built within the SQLite environment, providing a robust and portable data storage solution for logging QSOs and managing station information. The program's architecture focuses on practical functionality for daily amateur radio operations. Operators can utilize NewLogOSH for contest logging, general DXing, and managing their station's contact history. The inclusion of FT4 and FT8 modes reflects current trends in digital communication, while RTTY and PSK support caters to established digital protocols. The DXCluster integration provides real-time spot information, aiding in DX hunting and propagation analysis. Its SQLite backend ensures data integrity and ease of backup, making it a reliable tool for maintaining comprehensive station logs.

OARS is dedicated to promoting and supporting Amateur Radio in the Olympia Washington area.

Explains the fundamental principles of Software Defined Radio (SDR) and Digital Signal Processing (DSP) within the amateur radio context, serving as an initial entry point for hams interested in these technologies. It covers the architectural shift from traditional analog hardware to software-centric radio systems, detailing how digital signal processing algorithms are applied to modulate, demodulate, and filter radio signals. The resource compiles a list of external links to _white papers_ and project pages, offering further technical depth. This page provides a foundational understanding of SDR/DSP, enabling operators to grasp concepts like direct sampling and quadrature mixing. It references various projects and discussions, allowing users to explore practical implementations and theoretical underpinnings. The curated links direct users to resources that might cover specific SDR hardware platforms or software applications, facilitating deeper research into the subject.

The oldest continuously operating amateur radio club in the United States

A Six element antenna for the 50 MHz Amateur Radio Band v4 by DF9CY

The complete Bozo's guide to JT65A by K3UK, learn how to install and operate WSJT software and start making QSO in weak signals operating modes

The Lassen Amateur Radio Club has been affiliated with the ARRL since 1972

M0CVO Antennas, amateur radio antennas for fixed station or portable operations, HF/6m all are catered for. The antennas produced by us are all manufactured by Nigel Booth, M0CVO

Serving Columbia and Greene Counties of New York State

President Karami Radio Society. Amateur Radio Club Station OD5RAK, Tripoli - Lebanon

CASPERARC amateur radio club in Casper Wyoming

German Ham Radio Station DF1ZN

An interesting article on how build an optimal sounding communications loudspeaker capable to optimize sound reproduction at the frequency range from 150 Hz to 3 kHz.

The Western Oregon Radio Club operates Linked Amateur Radio repeaters in the Portland Oregon Area

Broward County

Rocket ham web radio shop based in Japan

Guidelines for optimal speaker placement inside our ham radio shacks

Broadcast 300 hours of programming a day through the facilities of 23 transmitters in the domestic and external services

Vapex Tech offers over **150 different battery products** tailored for diverse applications, including specific models for Icom, Kenwood, and Yaesu handheld transceivers. The product catalog details specifications for NiMH, LiPo, and LiFePO4 chemistries, providing crucial data on voltage, capacity, and discharge rates. Customers can browse by application, such as _Airsoft Batteries_ or _Model Control Batteries_, or directly by consumer battery types like AA and AAA cells. The resource presents a structured e-commerce platform where users can filter products by category, view detailed item descriptions, and proceed with online purchases. Each product listing includes high-resolution images and key technical parameters, enabling informed selection for specific radio equipment. Operational hours are clearly stated as 9am-5pm Mon-Fri and 9am-12pm Sat, with contact information including a sales email and phone number for direct inquiries. The site also features a "Latest News" section, indicating ongoing updates regarding product availability or company information.

This is an Arduino-based rotator interface that interfaces a computer to a rotator or rotator controller, emulating the Yaesu GS-232A/B and Easycom protocols which are supported by a myriad of logging, contest, and control programs.

MorseExpert 1.15 decodes Morse Code audio to text, leveraging algorithms from CW Skimmer for optimal performance on weak, fading signals amidst interference on amateur radio bands. It processes audio from the device's built-in microphone or an external radio receiver via cable, optionally highlighting Ham callsigns and keywords. The application features a waterfall display with a bandwidth of 200-1200 Hz, decodes frequencies between 300-1100 Hz, and supports keying speeds from 12-45 WPM with automatic CW pitch detection. Recent updates include support for Android 15, edge-to-edge mode, improved stability, and a pause decoding button. A premium version offers an ad-free experience and user-selected text colors. Users can switch between General Text mode and Ham Radio QSO mode, which enhances word segmentation and highlights callsigns. The app also includes a frequency lock mode, text selection capabilities for copying, sharing, or saving decoded text, and provides guidance on reducing acoustic echo and constructing an audio attenuator for optimal radio interfacing.

CS5NRA - NRA Nucleo de Radioamadores da Armada - Portugal (Portuguese Navy Hamradio Club)

NT9K Personal Amateur Radio Website from Melbourne Florida

Current program schedules, RealAudio feeds, and listening tips from Belgian Public Radio which broadcasts worldwide in Dutch, German, French and English.

ladder-line is great - extremely low loss, even at high SWR. However, many hams refuse to use it because they are afflicted by common misconceptions

US amateur radio antenna manufacturer. Produce baluns, delta loops, dipoles, ocf antennas and more

SCARA is located in Siskiyou County, CA. Features information on club events, meetings, and membership.

This map shows real-time radio propagation from stations operating on 11 bands between 1.8 and 54 MHz in the amateur radio service. The display shows world-wide activity from the last 15 minutes and is automatically updated about every minute. Data for the map is gathered from several online sources: WSPRnet, Reverse Beacon Network (CW, FT4, FT8), PskReporter, and DX Cluster.

Telecomunications import export, ham radio dealer based in Belgium for MicroHam, MFJ, LDG, ICOM Yaesu and other ham radio brands

This online project guide details the construction of a homebrew boom microphone system. It details the assembly of a microphone shell from a 3/4" PVC pipe section and an end cap, requiring a drilled hole for a snug fit of the electret or condenser mic element. The internal wiring schematic specifies a **2.2 K** resistor and a **47 uF** polar capacitor for signal conditioning, with a circuit diagram provided for integration with IC-706 series transceivers. The guide outlines the use of CAT-5 cable for internal connections, incorporating strain relief at the rear of the mic shell, and an inline 3.5 mm jack to facilitate an external _PTT_ line, designed for a foot-mounted switch. Further construction involves fabricating a microphone shock mount from a 2-inch PVC connector, detailing the creation of four "fingers" and the insertion of screw-eyes for attaching elastic bands, which are twisted 180 degrees for tensioning and vibration isolation. A foam wind screen is also incorporated into the microphone assembly, secured with adhesive. The boom arm itself is repurposed from an articulated architect lamp, with the original lamp assembly converted into a **60 watt** resistive load for testing power sources. Microphone cabling is secured to the boom arm using wire ties, ensuring sufficient slack at hinge points to maintain articulation. The boom base is mounted to a bookshelf, requiring specific positioning to achieve proper microphone placement in front of the operator. Performance evaluation of the microphone system is conducted through on-air audio signal reports from other amateur radio operators. DXZone Focus: Online Project Guide | Boom Microphone Construction | Electret Mic Element | PTT Line

This website is made available to the CCARC Hamradio Community and to anyone interested in Amateur Radio.

The Mobileer group is for California Amateur Radio (Ham) operators to discuss family mobile radio caravan and camping trips.

OKDX Foundation is a non profit organization the aim of which is organizing and funding radio amateur expeditions to rare countries and regions where no or low radio amateur activity exists.

Constructing a compact directional antenna for the 17-meter band, this resource details the build process for a Moxon rectangle, a two-element Yagi variant with folded-back elements. It covers the antenna's evolution from the _VK2ABQ beam_ and provides specific dimensions for a version built using fishing pole whips. The content includes a discussion of the antenna's radiation pattern, feedpoint impedance, and its inherent front-to-back ratio, which is often superior to a standard two-element Yagi. Practical considerations for element spacing and material choices are also addressed, alongside a visual representation of the antenna's physical layout. Performance data presented includes a comparison showing the Moxon rectangle's **2.5 dB gain** over a half-wave dipole and a front-to-back ratio of **20 dB**. The resource also touches upon the antenna's relatively wide bandwidth for a two-element beam and its suitability for portable operations due to its compact footprint. It offers insights into optimizing the design for specific operating conditions and discusses the advantages of its lower take-off angle compared to omnidirectional wire antennas, making it effective for DX contacts on the 17-meter band.

DK8KV Longwave information

Whether you're teaching a ham radio class or studying for your license on your own I hope you find this website useful.

West Georgia Amateur Radio Society, Inc

Arizona near space research - promoting science and education by exploring frontiers in amateur radio and high altitude balloons.

30 meters beacon from UK. QRSS is a method of sending very slow morse code.

Stamford Amateur Radio Association Located in Stamford, Ct. US

Demonstrates a specialized DX cluster monitoring application, _DxWatcher_, designed for Windows environments. It processes DX spots received via Telnet/Internet, presenting them in a filtered table and a dynamic bandmap. The software integrates with transceivers, specifically the FT-2000, to read VFO frequency and enable one-click tuning to spotted stations. _DxWatcher_ version 1.0.3.0, released on 13 June 2020, includes minor bugfixes and improvements such as enhanced recovery from suspend mode. Key features include configurable bandmap position and size, automatic opening, and bolding of spots received within the last **10 minutes**. The application utilizes the standard _ctry.dat_ file for DXCC country analysis, allowing users to update it for current DXCC status. Source code, developed in C# with MS Visual Studio 2008, is freely available, encouraging modification and sharing while requesting retention of the original author's callsign.

Almost everything on the Italian ham-radio callsign assignment system

Operating the AO-51 amateur radio satellite with a handheld transceiver (HT) presents a practical entry point for newcomers to satellite communications. This resource details the necessary steps and considerations for making basic contacts, focusing on accessible equipment. It covers fundamental concepts such as _Keplerian elements_ for satellite tracking and the importance of understanding Doppler shift effects on both uplink and downlink frequencies. The tutorial outlines a straightforward approach to satellite passes, emphasizing the use of readily available gear. It provides insights into antenna orientation and timing for successful two-way communication. The content aims to demystify satellite operation, enabling operators to achieve their first **AO-51** contacts with minimal specialized equipment. Key aspects include frequency management and basic operational techniques.

A RS-232 to DB9 CW Radio interface with schematic diagram to connect your pc running CT by K1EA or Writelog to your keyer.