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Open source project offers a solution to remote control of your Amateur radio station. Base for connecting other components and their remote control. The main advantage is low cost and adaptability

This document is a must read for anyone considering building a good low cost HF multi-band antenna system. The author combine in this document four important ingredients to produce simple but effective antenna system, like antennas of non resonant length, line attenuation, the transmatch and the balun

VK Contest Club (VK1CC) is a national organisation for all contest minded hams in Australia

Wondering whether to spend a fine day with the YL or with the antenna? This article may help you decide by W1GV

Wiring a Balanced Microphone to the TS-590S Unbalanced Microphone Input

The HarRe antenna series, multi element quarter wave resonant broadcaters band receiving antenna

The idea makes use of a very simple direct conversion receiver on the band of interest.

PL-259, Motorola & N connectors, Coax Seal, universal adapter kit, TNC, Mini-UHF, SMA, F & BNC connectors, audio connectors,antenna mounts and antennas

PDF file of the Yaesu FT-991 manual

Instructions on how programming a regency scanner model R1060

Personal Blog devoted to ham radio topics, amateur radio issues, social impact of ham radio and opinion.

The 80 metre fox-or/test transmitter is a small low power transmitter which is designed to be used as an alignment aid for running up 80 metre foxhunt or ARDF receivers. It is also usable as a micro transmitter for fox-or-ing events.

link7 is a Windows 9X program to download/upload data from/to the Kenwood TH-D7.

A source of knowledge for learning about and understanding antennas. The goal is to present a comprehensive tutorial on antennas.

The current, the voltage, the impedance, the bandwidth, the polarization, and how the earth influences the famous radiation pattern.

A virtual museum of Collins Radios

About DRM, the DRM standard, emission types, upfrading your old HF RX to DRM

This video will provide a foundation for understanding how power amplifier circuits work. If you are new to High Frequency Power Amplifier Circuit Design, this is the place to start.

Here a comparison of Kenwood TS-590S used with MC-60A and the oringina dynamic microphone

Brief overview of PSK31 and basic operating techniques.

A full superhetrodyne SSB fox hunting receiver kit

A well done introduction to Packet Radio by WB9LOZ

This site is dedicated to those who enjoy building radios and other electronic devices using parts and techniques from bygone eras.

The Buddipole Deluxe, a portable HF/VHF antenna system, receives a practical assessment from IW5EDI after a month of field use. The author, constrained by antenna restrictions, highlights the system's crucial role in enabling portable operations, even managing sporadic digital activity from a balcony. Direct comparisons to a fixed 3-band dipole reveal surprisingly comparable signal reports on 15, 17, and 20 meters, underscoring the Buddipole's effectiveness in real-world scenarios. Tuning the Buddipole proves straightforward on bands down to 20 meters, though the review notes significant challenges with SWR on lower bands like 40 meters, where achieving better than 3:1 SWR was problematic. Observations also include SWR variations with dipole rotation and mast height, suggesting environmental factors play a role. The overall manufacturing quality of the antenna and its accessories, including the tripod and carry bag, is deemed good, despite a minor issue with a pole connector. Looking ahead, the author plans to construct a homemade Buddipole version, possibly optimized for the 30-meter band, specifically for PSK31 operations from an apartment. This personal project reflects a common amateur radio practice of adapting commercial designs for specific needs, further extending the utility of portable antenna concepts.

Monitoring real-time amateur radio activity is essential for DXers and contesters seeking rare contacts or tracking propagation. This online service aggregates DX spots from various **DX Cluster** networks, presenting them visually on a world map. Users can observe new spots as they appear, facilitating quick identification of active stations and potential openings. The platform offers filtering capabilities, allowing operators to narrow down displayed spots by specific bands such as 160m, 80m, 40m, 20m, 10m, and even VHF/UHF segments like 70cm and 23cm. Further refinement is possible by selecting the source continent of the spotter or the continent of the DX station, which assists in strategic operating. The service also includes a "Hot Now" list, highlighting currently active stations with recent spots. This dynamic display supports informed decision-making for pursuing **DX contacts** across different bands and geographical regions.

Two Way Radio Batteries, Rechargeable Batteries, Radio Batteries, Battery Chargers, factory direct with lowest prices available!

Using NEC4WIN for Jpole antenna modeling

Design, build and supply Military Diesel Operated Tactical generator sets, diesel generator sets, custom generators, auxiliary power units, portable power generators and tactical quiet generators used by the U.S. Navy and Air Force.

Connecting rhythm and language with Morse Code by Phil and David Tulga

Qsl card printing, filling, distribution. complete qsl service from Bulgaria

Microcontrollers for many ham radio applications including repeater controllers, beacon transmitters, keyers, antenna switches, battery monitors, etc.

A few pictures of an homebrew magnetic loop RTX antenna project, working from 30 to 12 meters with excellent results

This graphics-intensive program reveals the load on the output of a matching-network, based on measurements of the components in that network. Adjust the network (tuner) for a flat input, measure or look up the network component values and you will immmediately see the R and jX values of the load on the network, presented as both a schematic with the component values and as a Smith Chart normalized to the specified system impedance.

Home Brew a 4-1000A RF power amplifier project by W4NFR

Map of VHF UHF repeaters in australia

A MacOSX antenna design and electronics/electrical tool package. It is a multipourpose application that allow antenna design and comomn calculations

An almost invisible wire antenna for the 17 meters band

About Coax Traps, NC4FB examine the operation of coax traps through modeling.

Home build a Kenwood PG-5A cable. This lead is the audio data cable for some of the Kenwood Mobile transceivers

The Atmel AVR Butterfly is a credit card sized board which contains an AVR MEGA169 processor, a six character LCD display, a five way joystick navigation switch, a piezo speaker, a 3 volt lithium battery cell for power and a few other odds and ends.

Slim Jim Antenna projects by N9TAX

IC-V8000 spcifications in spanish by Radioamadores.net

This kind of antenna has grown in popularity over the last years because it gives you a decent performance and triband capabilities. But its 50 MHz design is far from optimal. Here you can learn how to improve its 50 MHz performance in a very easy way.

A video about secret listeners ham radio voluntary interceptors during ww2 an extract from The Secret Wireless War DVD

Online store for scanners, CB radios, marine radio, two-way GMRS radio and radio related accessories

Amateur radio installation services and products for sale. Tower erection services, shack setup, antenna installation

Operating the _Icom IC-746_ HF/VHF transceiver often presents specific technical questions, and this resource compiles a comprehensive Frequently Asked Questions (FAQ) document in an ASCII text format. It details common inquiries and solutions related to the rig's functionality, accessories, and potential modifications. The content is structured into distinct sections addressing general information, power supplies, antennas, microphones, keyers, amplifiers, TNC integration, and optional IF filters. The FAQ provides practical guidance on topics such as configuring the internal automatic antenna tuning unit (ATU), selecting appropriate power supplies, and understanding microphone pin-outs. It also delves into advanced subjects like computer control via CI-V, wiring for PSK31 operation, and troubleshooting common issues like low S-meter readings on 2m FM or loose tuning shafts. Specific questions cover the installation of optional IF filters, comparing Inrad versus Icom filters, and optimizing filter combinations for various modes. Furthermore, the document outlines various hardware and firmware modifications, including those for increasing monitor volume, replacing LCD driver transistors, and implementing a "poor man's TCXO." It even touches upon untested modifications, such as replacing PIN diodes in the demodulator. The FAQ also lists manual errata and discrepancies, offering a robust knowledge base for IC-746 owners seeking to optimize their station or resolve operational challenges.

How it's misused and misunderstood, and why it's not useful.

WA7LAW.COM is a site to support the activities of the Snohomish County Hams Club and for the use by ALL amateur radio operators in and around Snohomish County, club members or not.