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Malcom Technical Support Radio Electronics Repair, ICOM Authorized Service Center, also service 1988 and newer Kenwood HF/VHF/UHF transceivers based in Toledo, WA USA

The Salvation Army Team Emergency Radio Network (SATERN) is a vital resource for amateur radio operators involved in emergency communications. This network facilitates the coordination of communication during disasters, ensuring that vital information can be relayed effectively. SATERN operates through a series of nets that connect operators across various regions, allowing for real-time updates and support during emergencies. Participation in SATERN not only enhances your skills as an amateur radio operator but also contributes to community resilience. Operators are trained to handle emergency traffic and provide assistance to those in need. By joining SATERN, you become part of a dedicated team that prioritizes safety and communication in times of crisis. The network encourages regular participation in drills and training sessions to ensure readiness when real emergencies arise.

The Anglo Scottish Repeater Group is a voluntary organisation which owns, operates and maintains four amateur radio FM repeaters in North Cumbria.

Frequency coordinations on BC Canada

The Camb-Hams are an informal group of Cambridgeshire Radio Hams.

The Sutton & Cheam Radio Society has a 60 year history. We are an Affiliated Society of the Radio Society of Great Britain (RSGB) and are based in the London Borough of Sutton.

Upper New York Repeater Council, Inc, support the frequency coordination needs of the Amateur Radio repeaters operating in its area

The Trident Amateur Radio Club was formed in April 1973.

G1XYZ G3XYZ The Home of Amateur Radio in West Norfolk

NARC affiliated to RSGB

Virgin Islands Amateur Radio Organization

KARS was founded in January 2008 and has grown from strength to strength

Livonia Amateur Radio Club

Orchard City ham radio club in Kelowna, BC Canada

DMR personal web site. Includes download links for Codeplug for Hytera AR685 PD685G, PD785G, PD785 & X1P with DMR Plus and Brandmeister support with VFO like channels. Repeater maps. In German.

The Icom IC-7300 is a popular SDR transceiver known for its excellent performance in ham bands. However, users have reported issues with reception reliability outside these bands due to ADC aliasing. This phenomenon occurs when the sampling rate of the radio interacts with frequencies outside the intended range, leading to unwanted signals being received. For instance, when tuned between 30 to 36 MHz, users may inadvertently pick up WFM broadcast signals or PMR communications due to aliasing effects. This guide outlines modifications to improve the IC-7300's performance by addressing the low-pass filter design, which is crucial for reducing interference from these unwanted signals. The proposed modifications involve adjusting the low-pass filter on the PA unit to better attenuate frequencies that cause aliasing. Measurements indicate that the original filter design allows significant signal leakage, leading to false receptions. By implementing the suggested changes, users can achieve a notable reduction in unwanted signals, enhancing the overall functionality of the IC-7300. While the modification requires careful soldering, the benefits in performance make it a worthwhile endeavor for serious operators looking to optimize their SDR experience.

The ARRL's End-Fed Half-Wave (EFHW) Antenna Kit is an easy-to-build four-band antenna designed for 10, 15, 20, and 40 meters. Ideal for portable operations, it includes a 49:1 impedance transformer for compatibility with most transceivers. This project, detailed with step-by-step assembly instructions, involves creating a weatherproof enclosure and impedance matching network. The kit simplifies HF operations and supports multiple configurations, making it a versatile tool for amateur radio opertors.

The Mansfield Amateur Radio Society brings together people interested in Amateur Radio

David's blog dedicated to amateur radio operations

Thames valley repeater group homepage. information about the group, its activities and its four amatuer radio repeaters in the thames valley area

Amateur Radio Station Blog from the Isle of Man (by 2D0YLX) all things radio related with links to many sites on and around te island.

The Coulsdon Amateur Transmitting Society (CATS) website provides information on meeting schedules and an informational flyer. The content is concise and objective, catering to radio amateurs and technical users.

Dealer in HF, RF and microwave components based in Italy, offering a wide product catalog for amateur radio projects and more.

Ultimate HAM Radio LogBook for Windows for both beginners and experienced Dxers. It features several functions like complete logbook with powerfull search capabilities, FT8 and LoTW integrations, DX cluster. Cat Interface to control your radio, licence is based on yearly subscription.

The Northampton Scout Amateur Radio Group provides Radio Scouting and associated technology based activities for Scouts in the Northampton area.

For a century doing what we do best in support of the amateur radio community in Australia

Amateur radio station in Bosnia-Herzegovina

Experimental Methods in DSP design. The author explains how a software defined radio works to help other amateurs with their learning. This set of tutorials takes you from how to write a single component to a fully working SDR.

The Oxley Region Amateur Radio Club, ORARC provides the encouragement for those interested in the scientific development of radio communications and associated electronics.

VE2CYH The Covey Hill Amateur Radio Club Repeater is located on the Covey Hill, mountain and it operates on the frequency of 146.685

Amphenol is a manufacturer of RF connectors, adapters and cable assemblies. Amphenol connector product line includes common radio frequency interfaces such as BNC, SMA and TNC connectors as well as many others.

PI4CG Contest group 1884, CG1884 Amateurradio contest group

The Radio Club of the Watchung Hills Area - New Providence NJ

How to send and receive QSL cards at RSGB

The Sinbad Desert Amateur Radio Club is a general-purpose club that mainly serves the Carbon and Emery Counties but has members from all over Utah and surrounding states. The Club was formed by local Hams in Eastern Utah in 1982 by individuals with a common interest

The SAARC serves the northern portion of Michigan\'s Lower Peninsula and the southeastern portion of the Upper Peninsula

The Club aims to meet the needs of all interested in amateur radio, and has a varied programme of guest speakers, surplus sales, members' interests evenings, and social evenings.

Official web site of the Comox Valley ARC

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

The Davis County Amateur Radio Club (DCARC) is an organized, incorporated group of individuals with an interest in Radio Communications. Most of our members live in Davis County, Utah and hold Amateur Radio Licenses.

SimpleHRR is a free ham radio remote control web application (or web app) hosted by Raspberry Pi in the ham station to remote control a ham radio HF transceiver through a supported web browser from a Desktop PC, Laptop or Android phone. Supports recent ICOM IC-7x series transceivers

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.

Serving amateur radio and our community since 1962!

How many times have you heard the advice to coil a few turns of coax at the antenna end to form a choke. How to find out if your common mode current choke really works

The collinear J-Pole, often known as the Super-J, does improve the behavior over a regular J-Pole. there is an advantage when vertically combining 1/2 radiating sections to have a bit of separation between the half-wave end points. Get 0.8 dB more gain out of the trusty Super-J by replacing the traditional phasing stub with a long coil.

N3UJJ's Ham Radio Web Site

This unique online tool helps Ham Radio operators to choose the right rotator for medium and large HF antenna systems. The algorithm implemented in this calculator is the result of 40 years of experience in the HF Antenna sector. Given the Wind Speed, the total antenna square area, and the boom length, it will return the calculated torque value.

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

W4BS Repeater System Memphis, TN