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AMSAT-DL International Satellites for Communication, Science and Education.

ARI Sezione Varese

Ban Power Line Technology a website devoted to defend amaterur radio against power line communications devices interferences

Easter Island SA001 holiday style dx-pedition from November 23-28, 2014

Active RDF club in California

QCWW Chapter 120 amateur radio club

N3UJJ's Ham Radio Web Site

TN Contest Group

Map of locators of Uruguay

Telnet client for DXCluster, Sorts, colours and filters DX Spots by (2) bands, wanted DX Station, who spotted the DX, local to your area and more, Can spot automatically after logging a contact if you are using ZCZ Log, Look up call on QRZ.com

DC plug adaptor using an XT60 connector. 18650 Lithium battery 3 cell carrier, Three band end fed half wave antenna, XT60 chassis mounted flange.

Small company based in Santa Maria, California, designing and manufacturing electronic products for amateur radio, education, and commercial users. Product line includes APRS devices for real-time vehicle tracking, weather monitoring, and remote telemetry, as well as the ADS-SR1 Simplex Repeater, the ADS-WS1 Weather Station, the SSTVCAM slow-scan TV camera, and GTRANS protocol translator for Garmin FMI.

The Mission of CCARES is to train and organize amateur radio operators in emergency communications.

An L-Match tuner is a device that can add either inductance (L) or capacitance (C) to the antenna, bridging that gap between 5000 ohms and 50 ohms, thus matching it to the radio. The L-Match tuner is an extremely useful device that every QRP operator will want to have.

This is the website of the Meirion Amateur Radio Society, based in gwynedd north wales

The CobWebb antenna project is a compact, multiband HF solution ideal for amateur radio operators. Covering 14-28 MHz, it features a square dipole array with near-omnidirectional coverage and unity gain. This guide details a DIY approach, using a 1:4 current balun for impedance matching. Construction involves aluminum and fiberglass tubing, with optimized element tuning for SWR performance. Weather resistance improvements and resonance shift considerations are also discussed. Build your own CobWebb antenna for an efficient, space-saving HF experience.

The largest Amateur Radio trade show on Florida s West coast

As a ham radio club we get involved with contest, emergency response and services (CERT, RACE, ARES & etc), volunteering to organizations that needs our help (Community, Boys Scouts, Senior Citizens, & etc.), promoting and educating individuals of amateur radio operations (ARRL, FCC, Obtaining Licenses, Local Government, & etc), meeting new and interesting people around the world and beyond through many sources (VHF, UHF, HF, Computers, CW, D-Star, RTTY, & etc.), amateur radio is a great social skill, there is no age limit on who can get involved, and much more.

Picture and technical specifications of the Yaesu FT-8800R dual band transceiver

This project enhances Arjan te Marvelde's uSDR-pico by integrating a waterfall display feature. By adding an ILI9341 240x320 2.4" TFT display and modifying the software, the goal is to provide a panadapter to the existing transceiver. Initially developed with Visual Studio, the code was later migrated to Arduino IDE for Raspberry Pi Pico compatibility. The focus remains on preserving the original software, primarily enhancing the dsp.c file for waterfall implementation.

Amateur radio operators in northwestern Wisconsin often seek local community and technical support, which the Barron County Amateur Radio Association (BCARA) provides. This organization facilitates regular meetings, nets, and events, connecting hams across the region for shared learning and operational experiences. Members engage in various aspects of the hobby, from contesting and DXing to emergency communications and technical projects, reinforcing local Elmering traditions. The BCARA maintains a presence on social media, including a Facebook group with over **100** members, enabling real-time communication and event coordination. The club also supports local public service events, demonstrating the practical utility of amateur radio. Their activities encompass both VHF/UHF operations and _HF bands_, ensuring a broad appeal to operators with diverse interests and equipment setups.

Serving amateur radio and our community since 1962!

The Delta Amateur Radio Club (DARC) serves as a community organization for amateur radio operators in the Memphis, Tennessee area, providing resources and activities centered around two-way radio communication. The club maintains the W4BS repeater system, which operates on 147.060 MHz with a +600 kHz offset and a 100 Hz PL tone, facilitating local VHF communications. DARC actively supports the Amateur Radio Emergency Service (ARES), preparing members for public service and disaster response through training and coordinated drills. The club also hosts regular meetings and events, fostering camaraderie and technical skill development among its members. Membership in the Delta Amateur Radio Club offers opportunities for participation in various amateur radio activities, including field day operations and local nets. The W4BS repeater provides reliable coverage across the Memphis metropolitan area, serving as a critical asset for both daily ragchewing and emergency traffic handling. DARC's affiliation with the Amateur Radio Relay League (ARRL) ensures access to national resources and advocacy, reinforcing the club's commitment to promoting amateur radio and public service within the community. The club's focus on emergency communications strengthens local preparedness.

The eggbeater antenna uses on mobile operations using the metal roof of the car as the reflector. The distance between the antenna and the roof as described in this article should be 1/8 lambda.

Not a project yet, but very theoretical thoughts about very practical amplifiers!

SouthWest Iowa Amateur Radio Club

QRM.guru has been developed to assist radio hams in dealing with RF noise. This is an educational and reference resource.

SKB is a manufacturer of equipment cases, music cases, industrial, military and sport cases

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.