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The MFJ-940 VERSA TUNER II is a useful little antenna tuner for the HF-bands. However it suffers from a minor design error, which can be easily rectified.

Website for all Chesterfield Gateways on 446, using eQso.

Outlines recommended operating procedures for amateur radio repeaters, detailing best practices for general on-air conduct. It emphasizes using simplex when possible, monitoring the frequency before transmitting, and maintaining concise, thoughtful transmissions to avoid monopolizing the repeater. The resource also stresses the importance of legal identification, such as the Canadian requirement at the beginning and end of a contact and every thirty minutes of operation. Furthermore, the article provides specific instructions for **autopatch** operation, including access codes and the necessity of brief calls, while cautioning against misuse for long-distance calls or commercial purposes. It highlights the financial support expected from regular users to maintain repeater infrastructure. Finally, the guide differentiates between permanently linked repeaters, which offer extended coverage, and **code access linked repeaters**, explaining the sequence of identification and code entry required to establish and terminate links for broader communication.

10 Band DSP Equalizer for Ham Radio, requires Win 98 or higher, 128 MB, 16 bit sound card.

D3+ High Performance Antennas for Field Day. This article describes versatile broadband wire antennas. These antennas will double your effective radiated power over a dipole, will be easy and inexpensive to build and install, and will be simple to match.

YF1AR 80 to 40 meter vertical antenna project

Producers of Scancat, Copycat, Magic and Distributors of HOKA's CODE-3 and CODE-30 decoders.

Win-Test is a contest logging software compatible with all the operating systems Windows 32 bits without exception. All major international and many national contests are supported. Network TCP/IP capability, radios and CW interfaced, database-aided autocompletion, and much more...

Email, GPS Beacon, GPS Tracker, Text Chat, Private messages, internet Network node (link across the internet). Dstar Comms can be used for email deployment, GPS Tracking, reliable communication plus much more. Availble in free and commercial version

Antenna manufacturer from Poland, produce dipole wire antennas, W3DZZ FD4 Windom and long wires, baluns, dealer for toroids and connectors managed by Leszek Mlynarczyk SP1BKS

The Antenna Rotator Controller is unique in that it senses, displays, and controls to the earth's true magnetic field. The compass sensor, mounted in a waterproof enclosure, is attached to the mast and sends its signal to a microcontroller

This document serves as a comprehensive guide for amateur radio operators looking to enhance their Yaesu FT-2000 or FT-950 transceivers with pan-adapter capabilities. A pan-adapter is an invaluable tool that allows operators to visualize the frequency spectrum, making it easier to identify signals and improve operational strategies. The guide details the necessary hardware modifications, including the RF Space IF-2000 board and various SDR options, along with their costs and installation procedures. The document caters to operators of varying technical expertise, providing step-by-step instructions and troubleshooting tips. It emphasizes the importance of using a sound card and software like PowerSDR and HRD for optimal functionality. By implementing these modifications, users can monitor multiple frequencies simultaneously, leading to a more productive and enjoyable amateur radio experience. This resource is particularly beneficial for those looking to modernize their equipment and remain competitive in the ever-evolving world of amateur radio.

To those new to the hobby of Amateur Radio, hearing the term QRP often raises questions: What is QRP? Why do some hams choose to operate QRP? How can I operate QRP? These are good questions, and all are worth asking. This article will attempt to answer these questions. by William Eric McFadden

Pre amplifier using a 2N5109 for the 160 meters band

Tune in live to the Grants Pass DPS police radio and Josephine County Sheriff's Office radio feeds.

Illustrates the specific wiring and configuration steps required to interface an SGC-230 Smartuner with an Icom IC-706 HF/VHF/UHF transceiver. The document details the necessary connections for power, control, and RF signal paths between the two devices, ensuring proper impedance matching and automatic antenna tuning functionality. It specifies the pin assignments for the IC-706's ACC socket and the SGC-230's control port, crucial for successful integration. Outlines the operational considerations for the combined system, including initial setup procedures and potential troubleshooting tips for common connectivity issues. The resource presents a clear, diagrammatic representation of the interconnections, which aids in visual comprehension of the required cable fabrication or modification. Covers the specific settings within the IC-706 menu that need adjustment to enable external tuner control, such as the 'TUNER' function and other relevant parameters. This ensures the transceiver correctly communicates with the SGC-230 for efficient antenna tuning across various amateur bands.

Revisiting the WA2EBY broadband HF amplifier

Build a spiderbeam from scratch for 20-17-15-12-10 meters band

An easy to build single wire antenna for 160 and 80 meters with a better than 2 to 1 swr across the 80 meter band

Frequently asked questions on Digital Signal Processing

Morse Tutor is a DOS based program written in C++. It can be used to practice morse code. Various options are available. Morse tutor with Complete Source Code and Binary is available for Download (32KB).

Online shopping, Programming Software, Icom, Yaesu, Kenwood, Istron, HyGain, MFJ, cat cables interfaces and other radio control cables.

M0VEY 160 m DX mobile antenna

The project outlines the process for constructing a low-power FM broadcast transmitter using a Raspberry Pi Zero, a simple wire antenna, and battery power. It details the software installation steps for PiFM and MPG123, essential for generating and transmitting audio. The resource provides instructions for configuring the Raspberry Pi to broadcast FM signals, including command-line operations for initiating transmission and playing audio files. It specifically focuses on the Raspberry Pi Zero's capabilities for this application, highlighting its cost-effectiveness and minimal hardware requirements. The content presents a practical, hands-on approach to creating a basic FM transmitter, suitable for short-range, experimental broadcasting. It includes guidance on testing the FM output and ensuring proper operation of the software components. The project emphasizes the use of readily available components and open-source software to achieve functional RF output.

A three-frequency multi-band dipole that can be extended easily to additional bands. This article includes a multiband fan-dipole antenna for 80-40-20-10 meter band.

Quality sending instruments for the morse cw enthusiast by K4VIZ

About numbers stations, and their criptic transmissions, where to listen to them and some audio recording samples by fascinating shortwaves

New User Tips for VHF-UHF Operation by Dave Schultheis WB6KHP

Some antenna manufacturers place baluns at the incorrect location in LPDA arrays, or tell you to route the cable incorrectly. This can cause substantial RFI and all sorts of weird problems like RF into house wiring.

a comprehensive listing of both Military and Civil HF networks from Australia and it's surrounding neighbours as well as from countries around the world.

The ZS6BKW wire antenna, a variant of the G5RV, utilizes a specific 13m (42.6 ft) length of 450-ohm window line as its matching section, feeding a 28.5m (93.5 ft) flat-top element. This design aims for lower SWR on 40m, 20m, 17m, 12m, and 10m compared to a standard G5RV, often achieving SWR values below 1.5:1 on these bands without an antenna tuner. The feedpoint impedance transformation provided by the window line allows for direct connection to 50-ohm coax on multiple bands. F4FHH's experience involved constructing the ZS6BKW and evaluating its performance against an _OCF dipole_ (Off-Center Fed) on various HF frequencies. The article includes observations on SWR readings and operational effectiveness, highlighting the ZS6BKW's suitability for multi-band operation. The antenna's overall length, including the flat-top and window line, is approximately **41.5 meters** (136 feet), making it a significant wire antenna for fixed station use. Comparative analysis with the OCF dipole provided practical insights into the ZS6BKW's advantages and limitations, particularly concerning bandwidth and tuner requirements.

Professional Two Way Radio communication by ICOM.

A free application that searches more than 100 web-accessible sources to locate QSL information for a callsign that you enter once

The Upside-Down Umbrella Antenna by Don Keith N4KC

Icom IC-9100 on youtube

Schematic Manual of the 3 element Yagi antenna by ECO antenne

VHF quad antenna for transmitter hunting.

A Windows freeware DX cluster client, allows you to monitor DX spots from users worldwide includes DX filtering and statical functions.

Working with SDR#, adjusting frequency correction and basic setup.

yaesu radios community talk, impressions and comments about yaesu vx7r

KB1GW's collection of beverage antenna information

Wholesale distributor of CB radios, parts, antennas, microphones, power supplies, crystals, echo boards, expanders, meters and CB accessories.

An home made trapped dipole antenna for 40 and 60 meters band by 2E0HTS

K6ZB Bruce presentation of technologies to allow ham radio operate via internet

Learn a little bit about how duplexers work and building your own.

A basic article on end-fed antennas by KB6NU

Antenna switch at K6XX

Tower and antenna rotation equipment, insulators, rotor control cables, ancillary products

Compiling an extensive collection of technical information, the Repeater Builder's website serves as a critical resource for those involved in amateur and commercial repeater systems. It covers a broad spectrum of topics essential for the design, construction, and ongoing maintenance of these vital communication hubs, drawing from years of practical experience in the field. The site provides detailed insights into various aspects of repeater technology, including specific information on VHF and UHF bands, such as 2-meter systems. Users can find data related to repeater logic, control systems, and interfacing with other radio infrastructure, all presented with a focus on practical application. Authored by Kevin Custer, W3KKC, the content reflects a deep understanding of repeater operations and engineering, offering guidance that extends beyond basic setup to advanced troubleshooting and optimization.

A project to build a cross band repeater using a pair of Baofeng UV5R handheld transceivers.