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Roach pole vertical antenna for 40 and 30 meters band featuring good performance on short skips contacts compared to wire dipole

Adapted from a similar project by NA4IT. Made with one quarter wave 2 meter radiating element pointing upward and it is surrounded by four 70 cm elements.

A Quick start guide to NPR New Packet Radio on 70 cm band by the NPR author Guillaume F4HDK. This presentation introducte basic concepts of this niew digital protocol, and guide the user to the first modem configuration both of client and master modems. Includes a final recap of commands.

Supporting wire antennas with squid poles

A classic document originally presented in Proceedings of the Institute of Radio Engineers in 1937 and is, still today, the standard referenced by the FCC, text books and many amateur radio publications.

Utility-Driven Tradeoff Analysis, if you want to geto on the microwave bands , you will have to choose the proper antenna for your operating conditions. How to decide is not always easy, and you may also decide to build your own antenna.

A light and sturdy Quad for 10 and 15 meters. Basic Quad antenna design considerations. Building and assembling a dual band HF QUAD antenna, designing and joining cross-arms and boom, assembling spreader and element wire installation notes. QST article.

A very well done presentation about End-Fed Half-Wave antennas. This PDF document contains a summary of experiences in how to build custom EFHW antennas. Includes an interesting comparison table of UnUn configurations with recommended toroids, Wire size, turns and capacitors. An useful recap on common errors in building homebrew EFHW Ununs completes the document.

Building an amateur station for competitive radiosport involves a number of critical steps, regardless of the band or bands you focus on. These include, but are certainly not limited to: Station layout, Equipment interconnection and switching, Inter-station interference, Antenna selection. Radio interface with the logging program, CW and voice keyer integration, Rotator control

A PDF Presetation from the W0DXCC Forum on how to improve the performances of the popular Yaesu FT-2000 transceiver

Acom 1010 operating manual in english PDF File

The Kenwood MC60A with preamp, suffers from RF feedback, a search on the web reveals the extent of the problem. This document explain how to fix this problem.

A two element beam antenna for ten meters band. This home-brew two-element beam is the perfect introduction to rolling your own gain antenna

This tutorial provides background information on the decibel and instructions for performing calculations involving decibels. This tutorial combines information from several authors, including Bob DeVarney, W1ICW; Walter Bahnzaf, WB1ANE; and Ward Silver, NOAX

This article will explain a few of the ways author use an external SDR and Linrad to enhance his K3 experience. Linrad is one of many available SDR receiver programs. The same could be done with any radio that lets you access its IF frequency output. Article from NCJ Nov Dec 2019

Article appeared on 73 amateur radio today in 1999 on how to unlock the secrets of sending precise Morse Code. Article contains hints on how use the stright key and the sideswiper key, but even the electronic keyers or the semiautomatic keys.

Can Home Solar Power and Ham Radio Coexist? It is possible, with minimal interference from the solar power system, provided you make some modifications.

A complete guide to start operating EME. In this document, that is the result of several years of experimenting, the author summarize the steps to begin on Earth-Moon-Earth communications

An in-depth comparison here between the various digital technologies

6 Elements on 50 MHz / 6 metres

Amateur radio antennas manufacturer based in Italy. Produces HF end-fed, dipoles, and other wire antenna types, mono band and multi band antennas.

Optimizing the Performance of Harmonic Attenuation Stubs

A folded dipole is an antenna, with two conductors connected on both sides, and folded to form a cylindrical closed shape, to which feed is given at the center.

A blog about ham radio. A blog dedicated to cool stuff like ham radio, birdwatching and bus timetables

A trap antenna dipole covering two differen bands made reusing an old 160/80m inverted vee antenna.

Six Steps for Programming your IC-2100H from the front panel of radio. Using these steps you should have no trouble entering either simplex or repeater frequencies and saving them.

A practical guide to program Chinese Radios like Baofeng UB and BF series hanheld trnsceivers

What is VSWR and why you should care, formal definition of VSWR and SeaSonde Measurements, formulas

Icom IC-703 HF + 50 MHz transceiver, english official instruction manual available in PDF File to download.

From 1921 to 1924, radio amateurs experimented with transmitting across the Atlantic. Everyday Engineering magazine organized the first sending test with English amateurs prepared to listen for signals from the US

A Rig control CAT interface schematic suitable for both the Yaesu FT-817 and FT-100 transceivers.

Diamond W8010 Multiband Dipole Modifications

This paper discusses the sources of feed line currents and the methods used to control them.

A prototype of a switch foot made on a square aluminium stock frame

Project Ham: Cushcraft MA5B installation by Gary VE7AS

A multi-band off centre fed dipole, designed to operate on all bands from 40m (7MHz) to 6m (50MHz). Author claims it will operate on 40, 30, 20, 17, 15, 12 and 10m without an ATU (SWR <3:1) plus 6m with an ATU.

Amateur radio in cartoon type TV shows, Simpsons, Southpark, Family Guy, SpongeBob

This article is about two excellent small helical antennas for the two meters band. With performance close to that of full sized antennas, these small helical antennas are low in profile but high in efficiency.

If you thought you knew everything about balun performance characteristics, there is an important figure of merit you may have neglected

Article on operating aids and band usage during solar minimun periods. Author tries to explain what can we expect on the HF bands during a solar minimum period and which approach to be used to understand band openings.

This EXCEL Program Worksheet calculates the safe operating conditons for a toroidal transformer operating between 1 and 50 MHz. Manufacturer data for complex permeability, magnetic dimensions, and saturation flux density must be available. Some core types which are commonly used in amateur transmission are included. The program produces limiting winding voltages for linear operation and temperature rise over the range of frequencies and power specified.

Internal Bluetooth interface for miniVNA, Bluetooth connection to the PC allow Full cordless operation with ao external components

A 18 elements Yagi antenna for 432/435 MHz as published on 2011 CQ VHF magazine

This is a synopsis of a talk presented to the Sydney VHF DX GROUP by VK2ZAB on how, when and why is convenient to build a Yagi antenna stack.

Guide to the Yaseu VX5r, Modes, Memory Banks, Buttons, SET commands, How to save a memory, Tricks and Memory Channel Listing

This resource provides a historical analysis of amateur radio call sign assignment policies in the United States, detailing regulatory shifts from the Department of Commerce to the Federal Radio Commission (FRC) and subsequently the Federal Communications Commission (FCC). It documents the evolution of call sign issuance, from early reissuance practices in the 1920s to the implementation of the Group Call Sign Assignment System on March 24, 1978. This system categorized call signs (e.g., 1x2, 2x1, 1x3, 2x3 formats) into groups A, B, C, and D, correlating with license classes such as Extra, Advanced, General, and Novice, and specifying prefixes for contiguous U.S. and territorial areas (e.g., _AH_, _KP_, _KL_). The document further details the legislative process leading to the modern Vanity Call Sign program, initiated by a petition in June 1990 and formalized by the Omnibus Budget Reconciliation Act of August 10, 1993. It outlines the FCC's adoption of final rules on December 23, 1994, and the subsequent fee structure, with the first vanity call sign issued on May 31, 1996, at a cost of **$30.00** for a ten-year term. The ARRL's proposed "starting gates" implementation strategy is also described, which phased in eligibility for vanity call signs based on license class and prior holder status. DXZone Focus: Historical Document | Regulatory Analysis | Call Sign Formats | Fee Structure

PSK Reporter,is a powerful tool for monitoring your FT8, JT65 or PSK signals around the world. But, even if you are not transmitting on any of these modes it can still be a great propagation tool for determining which bands are open and to where in the world signals from your area are being heard.

A rotary dipole antenna for 30 meters band. Each arm is about 12.5 ft and is constructed from telescoping fibreglass flag/fishing poles and short lengths of aluminium tubing. Two short lengths of glass-fibre rod were used to insulate the arms from the supporting hardware.

Adapting a common PC earphone with microphone to connect to a transceiver via a homemade pre-amplifier, using a simple chip with aprox 10 db gain. Includes a schematic diagram

Schematic drawing and instructions for the construction of a simple portable dipole for use in low power and portable operations