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YOTA Youngsters On the Air Facebook public group

A Simple Serial and Sound-Card Interface for the Yaesu FT-857D using an FT232R USB-to-serial bridge chip.

Wireless Society of Southern Maine Projects, instructions and photos for many ham radio projects and experiments, including antenna construction and modelling, kit building, station setup, restoration and more

A review of the 30 meter MonoGap Antenna. This review covers from the unboxing go the Gap product, the assembly of the elements, the test and tuning phase and a performance report during the years

The DIY 137 MHz WX SAT V-dipole antenna project details the construction of a specialized antenna for receiving weather satellite transmissions. It provides specific dimensions for the dipole elements, designed for optimal reception around the 137 MHz band, which is commonly used by NOAA and Meteor weather satellites. The resource outlines the materials required, such as aluminum tubing for elements and PVC for the support structure, along with the necessary coaxial cable and connectors. The article presents a clear, step-by-step assembly process, including how to form the V-shape and connect the feedline. It emphasizes practical considerations for mounting and weatherproofing the antenna for outdoor deployment. The design focuses on simplicity and effectiveness for amateur radio operators interested in satellite imagery. Key aspects include the precise angle of the V-dipole and the lengths of the radiating elements, which are critical for achieving the desired circular polarization response for satellite signals. The resource includes photographic documentation of the construction phases and the final mounted antenna.

The purpose of this blog is to help new hams and promote amateur radio

Real-time solar activity page at SpaceWeatherLive.com display sunspot regions, indicating sunspot numbers of with manitude class, Solar Flares and a list of daily events on the sun.

Heinrich Hertz was the first to send and receive radio waves.

DK7IH QRP transceiver for 14 MHz. This small and compact home made transceiver with a max power output of 5W, the VFO module is based on the clock oscillator chip Si5351A by Silicon Labs ATmega168 and OLED 1306

The White Rose Amateur Radio Society website provides information on amateur radio activities in Leeds and West Yorkshire, including details on meetings and membership. Contact details for the membership secretary are also available.

If you want to have a closer look at the weather, you can download software and visually display data.

The South Essex Amateur Radio Society was formed in 1983 in UK

A review of the Alpha 87-A power amplifier by WD0M

Clarifies the intricate process of calibrating the _Elecraft K2_ dial, addressing common user challenges and lively discussions on the Elecraft reflector. Wilhelm, W3FPR, dissects the K2's PLL synthesizer design, chosen for its low phase noise, kit-friendly duplication, and cost-effective components. The resource emphasizes the critical role of the 4000.000 kHz reference oscillator's accuracy during CAL PLL, CAL FIL, and CAL FCTR functions, noting its dependence on temperature and crystal stability for optimal performance. Explaining the K2's frequency display, the document reveals it relies on microprocessor-driven look-up tables generated by CAL PLL for VFO values and CAL FIL for BFO values. In SSB and RTTY, these combine, while CW and CWr modes also factor in the sidetone pitch. The author details inherent limitations, such as the 10 Hz increment resolution of the dial and varying PLL step sizes—from 3 Hz on 160 meters to 10 Hz on 10 meters. BFO increments range from 20 to 35 Hz, collectively limiting practical dial accuracy to within **20 Hz** with diligent effort, or **30 Hz** for a slightly less demanding task. The guide outlines a four-step calibration procedure: setting the reference oscillator, running CAL PLL, running CAL FIL, and setting all BFOs. It highlights the _N6KR Method_ as a particularly easy and accurate approach, requiring only the K2 and a known frequency source like WWV for zero-beating, eliminating the need for external test equipment.

A cavity backed antenna is a practical slot antenna tipically used in microwave applications

Fast Scan Amateur Television in Alabama, Arizona, Northern California Southern California, Georga, Illinois, Indiana, Kentucky, New Mexico, Nevada, Texas, Washington, Delaware, Maryland, New Jersey, and Pennsylvania

The Gwinnett Amateur Radio Society (GARS) is an ARRL special service club serving Gwinnett and the surrounding counties in Northeast Metro Atlanta. We are a diverse club with interests spanning all interests in amateur radio.

Jamboree On The Air web site from denmark

Amateur radio repeaters, often designated by an "R" number like _R6_ or _R5_, serve as crucial infrastructure for extending VHF/UHF communications range. This resource from Essex Ham explains the fundamental concept of a repeater, detailing how it receives on one frequency and simultaneously retransmits on another, typically with a 600 kHz offset for 2-meter repeaters. Understanding the input and output frequencies, along with the required CTCSS tone, is essential for successful access, ensuring your signal is processed and relayed across a wider service area. The article clarifies the importance of using the correct _CTCSS_ (Continuous Tone-Coded Squelch System) tone, often referred to as a sub-audible tone, to activate a specific repeater. It also touches upon the concept of _simplex_ operation versus repeater use, highlighting the benefits of repeaters for mobile and handheld transceivers. Proper operating procedures, such as listening before transmitting and keeping transmissions concise, are emphasized to maintain good amateur practice on shared repeater assets.

I wanted to mount an amateur radio antenna on my truck that was more permanent than the magnetic mount on I already had, but I had a few specific design requirements for the project.

How Oscilloscope works and how oscilloscopes are done, with main components like Vertical Amplifiers and Horizontal Scanning or Sweep Circuits

Getting Started on the Magic Band is a very exaustive article about operating the six meters band. It covers several aspects of operations, techniques, tips and guidelines on getting started on the six meters band.

The Carolina Amateur Radio Club is a service-oriented club and has been in existence for more than 30 years

Construction tips of a basic wire antenna, the half wave dipole. Inverted V dipoles and effects of inverted v on radiation pattern.

Formed in 1998 with the aim of encouraging Amateur Television (ATV) activity in the North London/Lea Valley area, and specifically to establish an Amateur Television repeater in North London.

Home of GB3FH, 50.770MHz CTCSS 77.0Hz

Free to download PDF book about operating The VHF/UHF bands written in the early to mid-1990s by a team of experienced VHF/UHF DXers and equipment developers, in an effort to pass on their knowledge and stimulate further developments.

The South Milwaukee Amateur Radio Club is an ARRL general-purpose affiliated club with Hams from all interest groups

A review of the GAP Challenger DX Antenna that is not a traditional 1/4 wave vertical, but is a vertical dipole, this gives it several advantages over a standard 1/4 wave vertical, mainly the reduced number of radials, with excellent performances.

A multiple page article about assembling the antenna system, this section includes informations on constructing of the concrete tower base, starting from setting up correctly the foundations in relation to the antenna height.

Current Solar Wind Conditions

HARIG is the radio club for people in and around the Harwich area in NE Essex on the east coast of the United Kingdom.

The Ford Amateur Radio League, the Tin Lizzy Club

A light portable 2 element Delta beam antenna for 14 MHz. It is basically a two element delta loop wire antenna made for portable usage providing good directivity and a 4.2 dBd gain

DxDozer is a Windows-based amateur radio logbook designed for both new and experienced DXers, featuring a robust logging system with extensive search capabilities. It offers seamless integration with FT8, displaying received stations from WSJT-X in a DX Cluster-like view, indicating LoTW status and prior contacts, and initiating QSOs directly. The software supports an unlimited number of callsign logbooks and allows multiple operators to log simultaneously to a single database, enhancing its utility for multi-operator stations or contest operations. The application includes a sophisticated DX Cluster with highly configurable filters based on band, mode, continent, worked/confirmed status, and LoTW participation, enabling users to monitor specific calls or countries. DxDozer simplifies QSL management by facilitating one-button uploads to LoTW and ClubLog, and downloads of new confirmed QSOs, with a dedicated field for QSL medium. The software provides both 'Easy' and 'Expert' modes to cater to different user proficiency levels, and is available via a yearly subscription after an initial free trial period.

The Narrabeen JOTA and JOTI camp facilitates global communication for Sydney North Region Scouts and Northern Sydney Girl Guides, utilizing amateur radio and internet technologies. Participants engage in two-way radio contacts, often on **HF** bands, to connect with other scouting and guiding groups worldwide, fostering international goodwill and technical skill development. The event integrates both traditional **ham radio** operations and modern internet-based communication methods, providing a diverse experience for youth members. The resource outlines the specific activities undertaken at the Narrabeen site, including station setup, operating procedures, and the use of digital modes for JOTI. It highlights the educational aspects of the event, such as learning about radio propagation, antenna theory, and basic electronics, all within a structured camp environment. The page also provides logistical information relevant to the Australian context of the event.

Tim Kirby G4VXE gets a first look at the much-heralded FTdx101 from Yaesu.

Configuring dxlab commander to properly control the Icom PW-1 power amplifier

Virgin Islands Amateur Radio Organization

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.

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.

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

A QST Article published in November 1922 is about the origin of Beverage antennas, an unidirectional antenna type that was discovered and experimented for the first time in that period. This article is the introduction to beverage antenna theory, by the homonimous autho H. H. Beverage.

An article by MicroHam on using the Icom PW-1 RF Power Amplifier safely and with non-Icom transceivers.

In this article author illustrate a homemade yagi antenna for satellite operations. The antenna includes a VHF antenna and an UHF antenna with a band splitter.

Mint tin transformed into a switched 9v battery to Anderson PowerPole

QRZ personal page, history, log, equipment and more

Active RDF club in California

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.