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recognized Amateur Radio Frequency Coordinating entity for the State of Arkansas.

How to operate in australia with your licence

MARC, established in 1948, holds monthly meetings of its 70+ members on the first Thursday of every month

A table that summarize all known amateur radio emission modes, with reference to software and platform available for digital modes

Home of the HSMM Mesh is a reference web site for HamNet enthusiasts

Dedicated to promoting the contributions of women in Amateur Radio.

Author found a ratio between the lengths of the sides of the Delta Loop that give reasonably low SWR into a 50 ohm coaxial cable almost independent of the high above ground and other surroundings. This ratio also gives good results no matter orientation. Includes an online delta loop antenna calculator.

Receiving & Decoding NOAA Weather Satellites using a simple rtl-sdr dongle, a helix antenna and a Windows PC

W7GJ 6m EME DXpedition to Niue September 7-21, 2012 CQ DX Zone 32

Map of locators of ecuador

Based in Filwood, Bristol England

Amateur radio blog by Adrian Leggett M0NWK

Two way radio and radio repeater dealer in Hudson valley New York

Homepage of the Dutch amateurradiostation PE4BAS.

Curacao island by PJ2/DK5ON March 2014

Virginia SERA District

Local amateur radio club to the south of nottingham city

Sumter Amateur Radio Club (SARA) Official Website

Send and receive wireless messages adding a small 433MHz radio to your Raspberry Pi, without the need of a WiFi connection and operate remote-control main sockets

Handmade drawing of a 3 bands single loop, portable quad antenna used by the author during his dx pedition in Kenya as 5H3FM. This antenna is done using 3 telescopic spreaders and the spreader kit for 1 element quad by spiderbeam.

This antenna just requires about 24m of free space instead of 41m that a normal half wave 80m antenna needs to hang up. The so called loaded dipole uses a coil in every dipole arm to electrically lengthen the mechanical too short dipole arms. Every coil has an inductivity of 120 microHenry.

Crossband Repeating is a process where a Ham transmits one signal on one band (typically UHF), and it is received by another radio with a better antenna/power installation, and re-transmitted (typically on VHF) to another radio system, or a repeater. Everyday examples of cross-band repeaters are repeater receive sites that hear the input signals on 2m and retransmit those signals on a frequency higher than 220 MHz.

CT Spectrum Management Association

Decoding 433MHz-transmissions with software-defined radio.

FSQ is a Fast Simple QSO mode designed specifically for HF. It works well under NVIS and sunrise/sunset conditions on the lower bands, and also works well for short skip and grey-line on higher bands and can be used also on VHF FM.

Three local city times around the world displayed simultaneously.

CQ DX de JE1FQV

Burlington county radio club K2TD sponsor the New Jersey QSO Party

An optocoupled audio interface between PC and Transceiver for digital modes. The article includes full schematic of complete board and build instructions.

Roane County, Tennessee, USA

This small dual band UHF VHF directional antenna is good choice for portable operations. This antenna is composed by a moxon antenna for the two meters band and it includes two parastatic elements for 70 cm band.

Is a group of US repeater owners dedicated to wide area linking, disaster preparedness and emergency communcations for all licenced radio operators in CA AZ and NV

Williamson Co. Amateur Radio Emergency Radio Service

Membership of our society is open to employees of British railway companies and railway enthusiasts who have an interest in any facet of amateur radio

For my SOTA activities, i recently bought a QRP transceiver QRP SW-3B, which is a three-band QRP CW only for 40/30/20 m. So, i needed an antenna that would allow to use these 3 bands in SOTA portable activity. Already having some experience with the EFHW antenna, i decided to build one for 40/30/20m.

This antenna is reported as being lower noise than conventional yagis and had a very low SWR for 500 KHz.

WebSDR Pardinho SP Brazil providing access to HF bands 160 80 40 20 15 11 meters bands.

MARAC is a support group for county hunting and mobile activities with members all over the world

Communications Equip. & Military, Harris Radios parts, test equipment, power supplies, RF parts online dealer

Learn all about FT8 and FT4 digital modes in ham radio. Discover how to configure software to use these powerful modes for making contacts even in poor conditions. Find out how to hunt for awards and view instant statistics of your transmissions. Explore the benefits of using digital modes such as FT8 and FT4 for enhancing your ham radio experience.

List of global weather fax (HF fax) stations, including their locations, call signs, and frequencies. Click on any station's call sign to view its weatherfax broadcast schedule. This site provides various radiofax receiver manuals in PDF format, on the Receivers page.

Accessing current operational statistics for a DXpedition is crucial for DXers planning their next contact. This Club Log page provides a detailed, real-time overview of the 3Y0J Bouvet Island operation, a highly sought-after DXCC entity. It presents a dynamic dashboard showing total QSOs, unique calls worked, and duplicate contacts, all updated as logs are uploaded from the remote location. Users can observe the expedition's progress and strategize their operating times. The interface features interactive charts and graphs, allowing operators to analyze the _3Y0J_ log data by band and mode, including CW, FT8, and SSB. A breakdown of QSOs by continent provides insight into propagation patterns and where the expedition has focused its efforts. The page also includes a map for checking real-time propagation conditions to Bouvet Island, which is invaluable for optimizing contact attempts. Further details include the first and last QSO times, total operating days, and the impact on users' DXCC totals, such as new bands, modes, or DXCC entities worked. This resource is a vital tool for the DX community, offering transparency and actionable intelligence for chasing one of the rarest entities on the air.

The European CW Association is an organization that hosts European CW CLUBS. Using the Association as a platform, member-clubs may exchange ideas and information, arrange various activities involving mutual participation, and generally co-operate for the benefit of amateur radio CW operation.

July 2013 DXpedition to Miquelon Op - Eric KV1J

Amateur Radio Section, Isle of Wight England UK

An overview or summary of amateur radio / ham radio contests, contesting and a contest calendar of some of the more popular contests.

A hexagonal beam is a form of the Yagi antenna which is based on parasitic principles developed early in the last century in Japan for achieving gain in one direction.How HexBeam antennas works. A hexagonal beam operates exactly like Yagi antenna, but instead of a driven element that is straight like a dipole, it is a wire bent into the shape of the letter M.

This article taken from the IARU Region 1 VHF handbook, is about the history of the original Locator System named QRA-Locator consisted of just five-character code, two capital letters, a two-digit number and a lower-case letter, like inf example CM72j

Monthly DX Newsletter published by the North Florida DX Association W4ZR

The Northern Colorado (NoCo) DMR group is a group of Northern Colorado HAM radio operators who operate and maintain a Mototrbo radio network.