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

Operate several remotes linked to the Cactus Radio System in southeastern Utah, and Western Colorado, and an Open system in Western Colorado.

The Egyptian Radio Amateurs Society

Realtime online log search for 5X3C DXpedition to Uganda 2019

AN-SOF is a professional comprehensive software tool for the modeling and simulation of antenna systems. AS-SOF allows to describe antenna geometry, Choose construction materials, Describe the environment and ground conditions, Describe the antenna height above ground, Analize radiation pattern and front-to-back ratio, Plot directivity and gain, Analize input impedance and VSWR,Predict antenna bandwidth

An ARRL-affiliated Amateur Radio Club located near McKinney, TX

East river amateur radio club - Bluefield, WV

Live police radio feed from Gippsland Police Region 5 Division Q1 and Q2. Victoria Australia

Candlewood Amateur Radio Association

Gain we can expect of a parabolic antenna by F4DAY

Remote Ham Radio via WebRTC Audio Raspberry Pi 3. Stream Transceiver Audio to and from the remote station though a Browser using WebRTC.

Marquesas TX7EU DXpedition 2016 2016 Mar 3 - 2016 Mar 15 IOTA OC-027

Seaside Tsunami Amateur Radio Society

Datasheet Locator is a free tool that enables you to locate product datasheets from hundreds of electronic component and semiconductors manufacturers

Ascension Ham Radio Club based in Gonzales Louisiana

How to receive NOAA weather satellite with a home made QFH Antenna. This project includes some easy and efficient notch filters to suppress noise from FM frequencies

Smith Chart it is a graphic tool for solving transmission lines problems

MCRCA Monroe County Radio Communications Association

Running from Rome area at 28321 Mhz

Australian antenna manufacturer, Mobile 1 CB Radio Antennas, Mobile Phone Antennas 3G, NextG, EDGE Digital Radio & TV Antennas Broadcast Band Antennas Airband Antennas Amateur Band Antennas Scanner Antennas Commercial Antennas

Radio Amateur Society of Thailand

The MIT UHF Repeater Association maintains the W1XM Repeater which is located on the top of the Green Building.

Serving the Copper Country in Michigan's Western Upper Peninsula. Copper Country communities include Calumet, Copper Harbor, Lake Linden, Houghton, Ontonagon, Baraga, and other nearby towns.

Map of locators of Brasil

The Clinton County Amateur Radio Association - Club Call W8GO

A tutorial on setting up a Low Cost QRP (FT8, JT9, WSPR etc) Monitoring Station with an RTL-SDR V3 and Raspberry Pi 3

TIM-CO, an authorized distributor, offers a range of electronic components crucial for various applications, including amateur radio station builds. Their inventory focuses on **connectors**, both commercial and military-grade, which are essential for robust and reliable interconnections in radio equipment and antenna systems. This includes a variety of types suitable for RF applications, ensuring signal integrity. Beyond connectors, TIM-CO provides passive and electromechanical components, fundamental building blocks for any radio circuit or control system. These components are vital for constructing filters, impedance matching networks, and power distribution systems within a shack. Their selection supports both new construction and repair of existing gear. Additionally, the company supplies **RF-coax cable assemblies**, pre-fabricated solutions that save time and ensure proper termination for feedlines and inter-component connections. These assemblies are critical for minimizing signal loss and maintaining impedance matching from the transceiver to the antenna.

Czech Castles Award is given to any amateur radio operator who can provide confirmation of contacts with radiostations from castles and fortresses in Czech Republic.

Baofeng UV-B5 LCD background light is turned on only when some keys are pressed and stays on far a very short time. This article explains how to use flash switch which is used in UV-B6 version but in UV-B5 has no function.

A not-for-profit organization incorporated to promote ham radio operation on the bands above 50 MHz in the southeastern United States.

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.

A 30 Meter, Discrete Component CW Transceiver Built Manhattan-style

An interesting article on end fed half-wave wire antennas with a couple of original experiments. Author illustrate the role of the QRP matchbox, and a 40/20 meter antenna with a center stub making it a large bandwidth antenna for 40 and 20. Includes also an 80/40 end fed with the typical coil to make it available on 80 merts band.

A page with several testing and measurement resources usefull for those ham radio operators who needs to align or repair their own radio equipment.

High quality surge protector, lightning protection, surge protection, and power protection products

rpitx is a general radio frequency transmitter for Raspberry Pi which doesn't require any other hardware unless filter to avoid intererence. It can handle frequencies from 5 KHz up to 1500 MHz.

Sending and receiving text with Morse code light pulses across the room is a fun and cheap project you can do on a Raspberry Pi or Arduino or any other microcontroller. This post explains how I did it, and how you can do it too.

Established in 1938 & Celebrating 72 years of Amateur Radio in Gippsland & Latrobe Valley

International Ham Radio DX Pedition San Adnres Isl - 12 Nov. - 25 Nov. 2017

Free Windows program intended to be used as a training aid for sending CW using an iambic Winkeyer from K1EL Systems. Iambic Master operates as a game. The objective of the game is to send the text in the Target box as accurately as possible.

Sommer Antennas has been a manufacturer and producer of quality amateur radio antennas and antennas for professional use for more than 20 years.Developed by DJ2UT in Germany, our beams were first introduced to the U.S. market at the 1984 Dayton Hamvention

New generation Hex Beam Antennas. VHQ HEX Products, located in Peterborough, NH, is owned and operated by David M. Lavoie. Our products are designed to solve issues encountered in Ham radio applications and move with todays configurations in an ever changing climate

DX Pedition in Burkina Faso 2007

Basic magnetic loop antenna examples and loop aerials theory explained. This article inclued some interesting tricks on building magnetic loop antennas and an usefull excell sheet to help compute magneti loop antennas calculating power efficiency from 10 to 40 meters band

DX resources by SV1CNS

Documents the _XT1T_ DXpedition to Burkina Faso, active from February to March 2013. This operation provided DXers worldwide with an opportunity to work a relatively rare entity, with the team focusing on maximizing contacts across various bands and modes. The expedition utilized an online log provided by _IDT_ (Italian DXpedition Team), enabling immediate verification of contacts and facilitating QSL requests. The _IDT_ system allowed participants to check their QSOs shortly after they were made, a crucial feature for contesters and award hunters aiming for DXCC credit. The expedition's success was measured by the total number of unique contacts and countries worked, contributing significantly to the global DX community's pursuit of new entities.

A guide to choosing the right hardware and a guide on how to install DXSpider on a Raspberry Pi3. This article include a video and a PDF guide about the installation.

Appendix 42 to the Radio Regulations, published by the International Telecommunication Union (ITU), serves as the authoritative global reference for assigning call sign series to countries. This essential resource allows radio operators, including those in the amateur service, to accurately identify the national origin of a station based on its callsign prefix. It is fundamental for DXers, contesters, and anyone involved in international two-way radio communication, ensuring correct country identification for awards like _DXCC_. The table details the specific blocks of call signs allocated to each administration, facilitating the unambiguous determination of a station's geographical location. For instance, prefixes like K, W, N, and AA-AL are assigned to the United States, while G and M series denote the United Kingdom. Understanding these allocations is crucial for logging contacts and verifying QSLs. This ITU publication is regularly updated to reflect changes in national assignments and new allocations, maintaining its accuracy as the definitive source for call sign series worldwide. It underpins the global framework of radio communication.