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This wiki is intended to help identify radio signals through example sounds and waterfall images. Most signals are received and recorded using a software defined radio

This is a presentation used at OVARC on the LindenBlad antenna construction. The presentation cover several topics about this antenna, from the basic antenna design, to the guide on how to contruct a custom lindenblad antenna for the 2 meters band and and 70 centimenters band.

Excellent article and guide to choose the best RF power amplifier that fit your needs by ON4SKY

Basic guidelines for proper placement of an amateur radio mobile antenna

Complete guide to receive weather satelite images with a RTL SDR dongle and free software

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

myVNA is a windows GUI program for the N2PK VNA

A guide to making good soldered joints and desoldering tips, includes an interesting how-to-guide on properly soldering electronic components

Setting up RTL-SDR, Zadig and SDR# on Windows

This page describes some repair tasks related to the Kenwood TS-850 transceiver. You will be guided through the repair proces step-by-step followed by descriptions and pictures.

Design Guidelines for JFET Audio Preamplifier Circuits By Mike Martell N1HFX

WinXXDataConverter is a Windows GUI application that will convert files between the various formats used by Win92, Win93, Win95, and Win96.

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

How to understand resistor colour codes

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

Guidelines for optimal speaker placement inside our ham radio shacks

Presents a concise guide for Amateur Radio operators participating in Jamboree-on-the-Air (JOTA), an annual event connecting approximately 500,000 Scouts and Guides worldwide via ham radio. The resource details how to initiate a voice contact, including the use of "CQ Jamboree JOTA" and proper signal reporting with the RST system. It also outlines the typical exchange information, such as name, QTH, Scout rank, and age, encouraging participants to practice their responses. Authored by Bill Wetherill, N2WG, the brochure provides a practical phonetics chart and a comprehensive Morse code dictionary, including punctuation and prosigns like AR and SK. It clarifies rules for third-party operation under the direct supervision of a licensed operator, noting restrictions on international contacts without specific government agreements. Additionally, the guide lists recommended World Scout Frequencies for SSB and CW across 80, 40, 20, 17, 15, 12, and 10 meters, emphasizing courteous operating procedures. It includes a section on common Q-signals like QRM, QRN, and QSL, alongside the Amateur's Code, which stresses considerate, loyal, progressive, friendly, balanced, and patriotic conduct.

AO-51 Operating guidelines and introduction

GUI for the KK7KA Wolf software, that was originally written as command line interface only. Wolf is a weak signal software

A beginners guide to DMR. This web site cover all aspects of DMR and is a valuable resource for those who want to get started with DMR.

A interesting guide to help get started with HF published at Essex Ham

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

A guide to setup a RTL-SDR on Windows, by installing the Zadig dongle software and setting up SDR Sharp for the very first time

This article serves as a beginner-friendly guide to constructing a simple VHF dipole antenna for 2 meters, perfect for novices in the hobby. With an emphasis on affordability and simplicity, it explains the basics without overwhelming technical details. Recommendations for coaxial cable and mounting methods are provided, offering practical solutions for effective communication. By following these instructions, novices can build a functional antenna without breaking the bank.

How to program Baofeng handheld transceiver with satellite frequencies, and how to get alerts when satellites are visible by using a smartphone app. A beginners guide to work satellites with a common VHF handheld radio.

What Are Pirate Radio Stations and Why Listen to Pirate Radio Stations, How to Listen To Pirate Radio Stations

This web article details the construction of a 4-meter band coaxial dipole antenna, designed for operation between **70.000 MHz and 70.500 MHz**. The resource provides a bill of materials and step-by-step assembly instructions for a half-wave dipole constructed from _RG-58_ coaxial cable. The design specifies a direct 50 ohm feedpoint impedance, eliminating the need for an external matching network. Construction photographs illustrate the stripping and soldering processes for the coaxial cable elements, ensuring proper electrical connection and physical integrity. The article includes specific dimensions for the radiating elements, derived from calculations for the 70 MHz band. The project outlines the physical dimensions required for resonance at 70 MHz, with the outer braid forming one half and the inner conductor forming the other. The feedline connection is directly to the coaxial dipole's center, maintaining a 50 ohm characteristic impedance. While the article does not present SWR plots or VNA sweeps, it focuses on the mechanical construction and dimensional accuracy for achieving a functional 4-meter dipole. The design is intended for fixed station use, with no specific mention of polarization or height above ground, but implies a standard horizontal orientation for dipole operation. DXZone Focus: Web Article | 4m Coaxial Dipole | Construction Guide | 50 ohm Feed

An article and buyers guide about antenna anlyzers, undestanding differences among popular RF analyzers in the market

News, frequency guides and programme information, on shortwave and other international media.

Introducing Japanese IOTA points and islands to foreign amateurs.

A Short Guide to Harmonic Filters for QRP Transmitter Output. - George Dobbs G3RJV

The page provides a detailed guide on how to build your own NOAA weather satellite receiving station, covering hardware, antenna, computer setup, and software installation. It offers a straightforward explanation suitable for beginners and serves as an educational project. The content includes step-by-step instructions and tips for observing satellites in the night sky.

A guide to learn how oscilloscopes work

Article provides a guide on how to use 24 GHz band and what to expect, including Active modes, equipment, propagation and antennas for this band in by VE3SMA

Aka Circular Waveguide Antenna. This online antenna calculator let you plan your cantenna for the desired frequency of operation, giving the Can diameter you have available.

Summary, tutorial about the basics of what is a waveguide and the basic waveguide theory.

Anderson Powerpole connectors are becoming the standard for Raynet ARES and RACES groups as well as many Ham radio shacks round the world. This recourses page will give you a guide to Anderson Powerpole connectors in the radio shack.

Training books and study guides for the UK Licence

A nice guide to make basic contacts in morse code with a particular reference to SOTA operations by VK3BQ

What you really need to know about spectrum analyzers

Home of the Radio Teacher Project Website, study guides, class documents and videos to be used by instructors

A Horn antenna by WE3HHT

Review of the Icom IC-706 series, include a short demo video and a short menu table available for download

About SDR Radio, basics and a how to guide

Cobham Microwave has a long term experience in Microwave Systems and Components. Their five areas of capabilities are Systems and Components: Diodes & Modules, Ferrite Devices, RF Filters, and Waveguides.

If you have just bought a new D-STAR radio, have read all the instruction, know how it works but are not too sure of what and how much you can do with your radio, this guide can help you understanding the basics of how to operate in D-STAR mode.

A complete guide for newcomers edited by the Radio Amateur Society of Australia Inc. This free PDF includes several basic articles for new hams, with particular reference to Australian regulations, but is however a good guide for those who are aproaching the hobby worldwide.

DXpeditioning since 1993, February/March 2006 - Saint Martin & St. Maarten FS and PJ7, October 2005 - South Africa ZS1/DL7DF, April 2005 - Ghana 9G5SP, Feb/Mar 2005 - British Virgin Islands VP2V/DL7DF, October 2004 - Cameroon TJ3SP, February 2004 - Kenia 5Z4HW , October 2003 - Myanmar XZ7A, March/April 2003 - Tobago 9Y4/DL7DF, Oct/Nov 2002 - Guinea 3XY7C

This site features Samuel M. Goldwasser's latest and greatest "Notes on the Troubleshooting and Repair of..." series of comprehensive repair guides for consumer electronics equipment and other household devices.

An operating guide for the com IC-2720H VHF/UHF Radio, includes Turning the power On or Off, Selecting the Output Power, Activating Memory Mode, Operating in Memory Mode