Search results

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.

How to setup and install custom filters, usually inrad, into Yaesu FT 857 and FT 897 transceivers

The author explores the VP2E antenna, introduced by Ed Durrant DD5LP, for Portable Operations on the Air (POTA). Detailing its unique design, successful trials, and an unexpected propagation twist, the VP2E proves a promising addition to the author's portable antenna arsenal.

The Radio Reference Database for United States

CASPERARC amateur radio club in Casper Wyoming

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

Blog pour Radioamateurs. A Blog for radioamateurs mainly in french

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

Antique radio collection from brazil, philips , philco, telefunken, blaupunkt, saba, mende, rca, ekco, pilot, general electric, bush and more

Broward County

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 Montgomery Amateur Radio Club Serving Montgomery County, Maryland Since 1966

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

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

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

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

QST Green Radio Round-up from April 2006

DK8KV Longwave information

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

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

Stamford Amateur Radio Association Located in Stamford, Ct. US

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.

Huntsville Area Active Amateur Radio Organization

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

When I tell friends that I enjoy amateur radio contesting, their reaction is usually a quizzical stare. "What's that?" It is hard to explain in the span of a cocktail conversation, so here is the answer.

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

The skyline amateur radio club official website with club news, links and hamfest information as well as forums

The DARA Dayton Amateur Radio Association is an association of radio amateurs, organized for the promotion of interest in Amateur Radio.

New Zealand Radio DX League

Non-profit Amateur Radio club organized for the educational and scientific study of electronics and communication

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

The World of LF, by G3YXM reference site for longwave operations. Introduction to operating on 136 and 501 Khz

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

Welcome to W8AL.ORG, home of the Canton Amateur Radio Club, located in Canton, Ohio, USA

The Cass County Amateur Radio Club is a Non-Profit Organization serving Logansport, Indiana 46947. The CCARC participates in ARES Nets, Skywarn Nets and Field Day and has 2m repeaters at 147.18 MHz, 145.23 MHz, and 145.35 MHz and a 70cm repeater at 443.65 MHz.

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.

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.

Link page to all kinds of packet radio related sites

The Compaq Computer Corporation radio club

Presents an Italian association, Club 27 Catania, which is affiliated with Protezione Civile FIR-CB. The resource indicates a focus on CB radio and various DX groups, including Papa Alfa Tango, Wisconsin Michigan, Charly Tango, Oscar Sierra, Big Time Operators, WAC Club, Azteca DX, and TX&RX Group. The page itself is a placeholder, stating "We’re getting things ready" and "Loading your experience… This won’t take long," suggesting future content will detail the club's activities and affiliations. The current state of the resource provides minimal information beyond its name and affiliations. It does not offer details on club events, membership, technical discussions, or operational specifics. The listed DX groups imply a focus on long-distance communications within the CB radio spectrum, but no specific results, comparisons of operating techniques, or practical applications are available on the present page.

Info about LA8G alias TY8G and JW8G

Serving the Public through Amateur Radio and Serving Amateurs since 1930

Ham radio club in Maine USA

Currently operate 3 repeater locations in Dix Hills, Huntington and Smithtown on 2 Meters, 1.25 Meters & 70 Centimeters.

Paulo Sousa ham radio blog with QSL pictures

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.

The South Canadian Amateur Radio Society (SCARS) is known throughout Cleveland County, Oklahoma