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Presentation about finding, restoring, updating and operating vintage Ham Radio by K4QKY and Bill Call, KJ4W

Depiction mapping software can download and integrate maps, elevation plots, weather data, situation reports, damage assessments, volunteer movement, and more. It interface with your APRS ssystem

All risk ham radio insurance plans

The TransWorld Antennas TW4040 The Adventurer Monobander™ is a portable HF antenna designed for rapid deployment in field operations, including **SOTA** and **POTA** activations. This manual details the antenna's assembly, tuning procedures, and operational guidelines for optimal performance on the 40-meter band. It outlines the specific components, such as the telescoping whip and base unit, required for proper setup. Instructions cover mast erection, radial wire deployment, and impedance matching to achieve a low **VSWR** across the designated frequency segment. The document also provides guidance on antenna orientation and environmental considerations for portable use. It specifies the antenna's power handling capabilities and physical dimensions when fully deployed and collapsed for transport.

A sharewave windows logging program for the ARRL 10 meter contest by N3FJP

Batterieries for ham radio handheld radios and more

Mobilinkd Bluetooth APRS TNC. With your radio, your Android phone and this TNC, you have everything you need to get started with APRS.

Solar Panels Grid Tie Systems, Kits, Fountains, Chargers and more

Tait electronics provides advanced and reliable voice and data radio communications products and solutions, specialising in customised solutions for organisations worldwide.

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.

Handcrafted sending instruments for the Morse enthusiasts. K4VIZ Morse keys and paddles manufactured by K8UL.

A presentation of the Yagi Antennas, and other interesting tid-bits by Brian Mileshosky. The document provides an in-depth exploration of the Yagi-Uda antenna, detailing its historical development, design principles, and performance characteristics. Originally described in the 1920s, the Yagi antenna features a driven element and parasitic elements, including reflectors and directors, which collectively determine its behavior. The document highlights how element lengths, diameters, and spacing influence gain, impedance, and directivity. It also discusses the antenna's reciprocal nature and presents data on typical gain values for various element configurations. Additionally, the text covers practical considerations, such as the construction of a "Tape Measure Yagi" for amateur use, and touches on related antenna types like dipoles and their application in Near Vertical Incident Skywave (NVIS) communication.

Site officiel du world lighthouse on the air award - official web site for wlota award

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

Solar panels manufacturer based in spain

Manual of the BD-35 Dual Band VHF UHF RF power amplifier by Mirage Amp

NT9K Personal Amateur Radio Website from Melbourne Florida

The Radio Reference Database for United States

Two find dipoles one for 75/40/20 and the other for 20/15. These 2 dipoles are at right angles to each other and the 20/15 dipole is located about 6 feet below the 75/40/20 fan dipole.

Comparison of all the oscilloscopes available for hobbyists, digital oscilloscopes that you can get for under $500, or oscilloscopes that you can build yourself.

Gnerate morse code at various speeds and with lots of different types of content, everything from individual letters up to a full QSO.

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

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

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

This project involves the construction of a 5 Watt Morse code beacon transmitter that operates in the 28.200 to 28.300 section of the 10 Meter Amateur Radio band. The beacon controller uses an Arduino Uno microprocessor board to produce the three signals that control the transmitter.

This calculator is designed to give the critical information of a particular beam antenna, in this case a three element Yagi, for the frequency chosen.

Designing your own QSL card is now easier than ever. This is a Program that helps you design and then Print your QSL cards filling them automatically with QSO data.

A distributed capacity coaxial dipole antenna. The antenna is very broadbanded with a very flat swr on all band when setup of the antenna is done at the proper lenght and height.

A dual band portable inverted V antenna for 80 and 40 meters band with dimensions for other bands and several assembling instruction

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

A Chaotic Collection of Keys, Paddles, and Bugs

Personal (b)log by a SWL in north Italy

This site is dedicated to design and analysis of micro- and millimeter wave filters from 0.5 to above 100 GHz.

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

How to understand resistor colour codes

Friis-It NF is the first iPhone OS based application that allows you to calculate noise figure, system sensitivity, and cascaded gain for an RF Receiver system

Coil winding on 4 inch PVC tubing with home-made tooling.

Bohannon Battery Distributors, for All your Battery needs, since 1987

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

Filters for the commercial 2 way market, MATV, FM broadcast, laboratory, marine industry, amateur radio, scanner and short wave. Antenna for amateur radio bands

Converting a HyperDawg to an antenna launcher

Homebrewing special insulators with PVC and copper corona rings

The CSV19 is an homemade antenna launcher project. In this article you can find pictures, drawing, and material list

A december 2003 QST article to Build a condenser microphone that will perform like the costly commercial units by KT4QW

Indoor setup of a two element SteppIR antenna

Pc based test and measurement equipment and instrumentation: digital oscilloscope, logic analyzer and spectrum analyzer.

Guidelines for optimal speaker placement inside our ham radio shacks

Convert any text in morse code mp3 file, you can choose speed from 5 to 50 wpm and tone frequency

A very active repeater system in NYC streaming live 24/7 on thier website & on shoutcast under the listing WB2HWW & also can be heard world wide on 10 meters 29.660 with links on Echolink & IRLP

QST Green Radio Round-up from April 2006