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My blog is general info regarding HAM radio hobby and collection of my QSL cards

Electronic Kits manufacturer, produce the Penntek TR-45L QRP Transceiver and the TR-25 CW Transceiver Kit

Attenuators, Couplers, Power Dividers, Terminations

The EU Sprint Gang hereby invites you to participate in the four European Sprint Contests.

Hall County ARES - The Hall County Amateur Radio Emergency Service has been organized to aid the public of Hall County and surrounding communities.

UK based CB Radio, Ham Radio, PMR Radio web forum

Building the Three-Element Hex Beam. A project and construction phase of an HF hex-Beam antenna using trees to hang the antenna and a Channel Master antenna rotator.

Review of the ICOM IC-7100 by M0ZZM owner of a IC 7400 and IC 7000

Since November of 1998, The Freewheelers Net has been on the air on 3.916 MHz

With the new name TRANSRADIO, the former TELEFUNKEN SenderSysteme AG enters into the new digital age of Broadcasting – DRM.

This project takes after the VGA-to-Scope converter by using composite video rather than VGA signals to create a display on an oscilloscope.

World leading specialist in manufacturing, providing design services for small scale wind turbine systems and parts (<30kW)

Producers of custom name tags, luggage tags, club badges, Employee Name Tags, Special Event Badges, but also Comtech Amateur Radio Television Transmitters and Receivers D480 filters, Video cameras and accessories.

The Kentucky Contest Group (KCG) website, maintained by N4GN, serves as a hub for amateur radio operators interested in **radiosport** contesting within Kentucky and southern Indiana. It details the group's dedication to promoting contesting, offers links to KCG officers, membership rosters, and upcoming meetings, and provides access to an active KCG e-mail reflector and Facebook Group for member communication. The site also features a comprehensive list of N4GN's recommended ham radio web picks, covering various categories like contesting resources, DXing, VHF/UHF/Microwave, and propagation information. The KCG's map center coordinates were updated on May 16, 2015, shifting approximately 16.5 miles SSW to 37° 21' N, 85° 39' W. Despite acknowledging current inactivity and an outdated web presence, the group remains operational, exploring options for reorganization, including a potential merger with the Tennessee Contest Group (TCG), which was ultimately rejected. The site emphasizes that membership applications are considered from anyone with a genuine interest in contesting.

Amateur radio, Technology, Towers, Land, Wilderness, real estate, Visalia DX Convention Report #1 Flexradio Antennas Dxpedition, Elecraft introduces K3, here are pictures of the radio from the outside and inside from the Visalia DX Convention

Design, develop, test and manufacture a wide range of Amplifier products including highly linear class A Broad Band, Cell Band, Pulse, AM & FM broadcast and Military VHF

Accurate meteorological data is crucial for optimizing antenna performance, predicting propagation, and ensuring safe tower work. This resource provides a curated inventory of weather stations, including models like the _AcuRite Atlas_ with lightning detection and the _Ambient Weather WS-2902_ WiFi Smart Weather Station, which offer real-time data on environmental factors. The product listings detail specific features such as direct-to-Wi-Fi connectivity, rainfall tracking, and temperature insights, enabling informed decision-making for various amateur radio operations. The platform categorizes products by application, featuring weather stations tailored for home and backyard use, as well as more robust systems for farm and agriculture, which can be critical for field day operations or remote station monitoring. It also highlights _Made in USA_ options, emphasizing local manufacturing and support. Beyond weather instruments, the site also presents related surveillance technology, such as the _Waggle solar CCTV camera_, designed for outdoor reliability with an IP65 weatherproof rating. This integration allows for comprehensive monitoring of remote ham radio shacks or antenna sites, combining environmental data with visual oversight.

Dundalk Amateur Radio Society. Ireland Calsigns EI7DAR EI0W

It is very compact, low noise and directive with an impressive 20 to 25 dB front to back

Diamond W8010 Multiband Dipole Modifications

An universal antenna tuner interface, the Kenwood Remote LDG Tuner Interface by af6sa

Receivers and transmitters by Collins , Drake , Hallicrafters , Hammarlund , National Receivers

The prototype for this amplifier was originally designed for 70cm and was used on the 2004 3B9C Dx-pedition to Rodriguez Island for satellite and EME. It had a noise figure of 0.49dB with an associated gain of 20dB.

Local APRS info & Tracking

Focused on technology to serve emergency response in clackamas county, oregon.

Effect of radials on the efficiency of antennas.

Drake TR-7 A.M. Transmit Filter Modification

Build a digital AC voltmeter to measure the output range from 0 to 150VAC with reasonable accuracy

Miscellaneous ham radio stuff from K2DBK

Mike's amateur radio blog from Rhodes Island ,Dodecanese, Greece

Examples of absorbtive low-pass filters in which the unwanted high-frequency energy is separated from the wanted output and then dissipated in matched resistors

You can shorten a vertical antenna by using a loading coil. This online calculator tells you how the amout of inductance your loading coil will need to have.

A non profit organisation run entirely by volunteers to promote Low Power Radio.

RF Wattmeters - RF Power Measurement - Bird Wattmeters Telewave - Coaxial Dynamics Wattmeters - Daiwa Wattmeters

A home made cobweb antenna project made with easy to find parts 2-14 AWG speaker cables which are cut to 1/2 wavelength for each band and junction box with 4:1 Balun

HM-36 Modification to make it work with an IC-7200 and the IC-7600

Monitoring extremely weak signals in the QRSS (Very Slow Morse) mode requires specialized receiving and processing capabilities to extract information below the typical noise floor. This project provides a software solution, _QrssPiG_, designed to run on a Raspberry Pi, enabling it to function as a dedicated QRSS grabber. It interfaces with various Software Defined Radio (SDR) devices, including the popular _rtl-sdr_ dongles and _HackRF_ units, to acquire raw I/Q data streams. The software then performs the necessary signal processing to visualize and decode these faint, long-duration CW transmissions, often operating with milliwatts of power. The system leverages the computational power of the Raspberry Pi for real-time signal analysis, allowing hams to participate in QRSS experiments and monitor distant beacons. It supports different SDR hardware, offering flexibility in setup and deployment for home stations or remote monitoring sites. The project includes detailed instructions for installation and configuration, making it accessible for those familiar with Linux environments. This grabber is particularly useful for tracking propagation on the LF and HF bands where QRSS activity is common, providing a visual representation of signal presence over extended periods.

Amplitude Modulation Forever for ham radio operators, shortwave listeners and collectors

CE9/VE3LYC and CE9/PA3EXX Wollaston and Diego Ramirez Islands 2011

H44G Log Online Solomon Islands Temotu Islands

How N1GY built his ride for Amateur Radio.

Founded in 1990, Nearson, Inc. has been providing our customers with exceptional value with the products and services we offer. VHF, UHF mobile radios, Cellular, PCS equipments as well as ISM band wireless data and WLAN applications.

F4FAP maintains a useful listing of current saltellites that are on the air and that can be easily heard and worked.

G6LVB beginners guide to receiving the AO-40 beacon

Past and current operations dedicated to St. Maximilian Maria Kolbe (SP3RN)

Useful tips on building cobweb antennas. Since I've done so many posts on the Cobweb antennas I thought it best to separate them on a different page so that potential Cobweb builders can see all the posts together. Hopefully this will make planning and building easier.

VP8O South Orkney 2011 DXpedition January 27 to February 8, 2011

The wire antenna described in this page provides much stronger signal strength while staying within the concept of a dummy load antenna.

Manufacture capacitors, sensors, diodes, varistors, chokes, inductors, ferrites and accessories

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