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A VHF UHF handheld antenna suitable for satellite operation by LY3H include antenna plan with dimensions and pictures.

Personal Blog devoted to ham radio topics,homebrew,antenna,satellite and other projects

6 Meter 1/4 Wave Antenna by Mike Fedler N6TWW. A detailed article with pictures of construction details of this 50 Mhz antenna

Logipic is a PIC Programer for windows

Pics and specifications

This is an internet resource for those interested in guitar amplifiers, vacuum tubes, and design tools such as SPICE modelling.

SSTV, pictures, home brew from sweden

Firsts pictures of Icom IC-9100 taken at Tokyo HamFair 2009

Construction of attenuator, suitable for fox hunts at 144mhz

Chronicles technical discussions and operational queries related to various Yaesu amateur radio equipment, primarily from February 2004. Topics include troubleshooting the _FT-101E_ -100v circuit, questions about the FT-990, and inquiries regarding the _VX-7R_ service manual. Operators discuss issues like the FT-101's transmit problems, FT-1000D tuning knob behavior, and the FT-897's linear amplifier control. The archive also contains posts about specific components, such as the 2SC2652 RF power transistor, and requests for parts like FT-221R boards. Users share information on CAT interface cables for the FT-1000D and discuss features of handhelds like the VX-2R and VX-7R. This historical snapshot provides insights into common problems and user-driven solutions for Yaesu gear from that era. Several posts offer items for sale, including an FT-208R and an MD-1 desk microphone, alongside requests to buy specific transverters like the FTV-650B.

A hombrew QRP transceiver for 40 meter band with many pictures, circuit and sound recording of some QSOs made with this Rig consisting of 5 transistor and one chip.

Presents the _K7AR DX NorthWest Web Cluster_, an online service for amateur radio operators to access real-time DX spots. The resource functions as a web-based interface, enabling users to monitor current band activity, identify rare DX stations, and track propagation conditions across various amateur bands. It aggregates spotting data, making it accessible without requiring a dedicated telnet client, thus simplifying access for many hams. The cluster integrates with the broader DX spotting network, offering a continuous stream of reported contacts. While specific performance metrics are not detailed, such web clusters typically update spots within **seconds** of submission, providing timely information crucial for DXing and contesting. Its utility lies in offering a quick, browser-based overview of the airwaves, comparable to traditional telnet clusters but with enhanced accessibility.

Demonstrates various practical amateur radio projects and technical discussions through video episodes. One episode details cutting and retuning a _1/4 wave shorted stub_ from 101.7 MHz to 107.5 MHz to safeguard a transmitter's driver stage, alongside insights into advanced _160-meter antenna systems_ like eight-circle arrays and beverage antennas. Another segment covers upgrading firmware on an _ATS-20+_ receiver using AverDudes for improved display and functionality, and a detailed guide on using D-Star DR mode on an _ICOM ID-52A_ for international repeater programming. Additional content includes a deep dive into _OpenHamClock_ as a potential replacement for the HamClock project, updates on _Raspberry Pi 5_ running Trixie OS, and a review of the Choyong LC90 Internet radio with AI integration. The series also features "Ham College" episodes, which meticulously prepare viewers for the Technician Exam by covering topics such as antenna and transmission line measurements, SWR interpretation, and the functions of basic electronic components like rectifiers, relays, and transistors. Practical advice on coaxial cable characteristics, dummy loads, and proper soldering techniques is also provided.

Protecting amateur radio equipment from transient overvoltages requires robust lightning and surge protection, which is the focus of Electronic Specialty Products. The company provides various devices, including coaxial lightning arrestors for antenna feedlines and surge protectors for AC power lines and data circuits. These devices are engineered to divert high-energy surges, such as those caused by direct or indirect lightning strikes, away from sensitive transceivers, amplifiers, and computer components, thereby preventing catastrophic damage. Key products include the _Coaxial Lightning Protector_ series, designed for various impedance levels and frequency ranges up to 3 GHz, and the _AC Line Surge Protector_ for shack power distribution. Effective deployment of these protection devices can significantly reduce the risk of equipment failure and ensure operational continuity during severe weather. For instance, a properly installed coaxial arrestor can handle peak currents of **20 kA**, while AC line protectors offer clamping voltages typically below 400V. Comparing different models reveals varying levels of insertion loss and return loss, with some coaxial units exhibiting less than 0.1 dB loss at 500 MHz, making them suitable for high-performance HF and VHF/UHF operations. Integrating these components into a comprehensive grounding system is crucial for achieving maximum protection against both common-mode and differential-mode surges.

Crank-up(telescopic) and tilt-over tower, Ring rotator for mounting an extra antenna, from 16m to 42m, Strong safe and smooth, Radio communication and commercial tower.

Large picture and specifications

A page dedicated to the Quadrifilar Helical Antennas, with projects, pictures and antenna plans by OH2GVB

AGB - Activity Group of Belarus have Awards and Trophy programs - 19 color award of Belarus and World team. Rules and pictures.

Yet another Arduino CW Decoder based on the OZ1JHM prototype this include a custom program that can be downlaoded along to component list and pictures

The East Tennessee DX Association (ETDXA) is an amateur radio club that welcomes all experience levels. They focus on a variety of activities including DXing (long-distance communication), contesting, and general ham radio topics. Their goal is to create a community of radio enthusiasts who can learn from each other and enjoy the hobby together. They also aim to promote the art and science of DXing while representing East Tennessee on the international amateur radio scene

Project with pictures and plans for an HF off center fed dipole by KB1NWH

Picture taken from official manual with notes on tuning stubs for each band

Spider Beam antenna pictures in a youtube video

Picture and reference links for STL Small tumed loops antennas by DJ3TZ

A PIC Programmer for Windows, support for dsPIC, PIC10F, new PIC12F6xx family, PIC16F9xx, PIC18F

A PIC based morse code decoder circuit

Pictures of the Yaesu FT-450 at mods.dk

A good reference site for antique radio, bakelite paskon plastinc decription, microphones picture and antique radio gallery

PIC micro controller based frequency counter with LCD readout

The North East Weak Signal Group (N.E.W.S.) website serves as the digital hub for an ARRL-affiliated regional club dedicated to _weak signal_ work across the VHF, UHF, and SHF spectrum, from 50 MHz up to light. It provides essential information for members and prospective enthusiasts, including the club's constitution and by-laws, details on officers and the board of directors, and a calendar of meetings and events. The site also features an application for membership, information on dues, and a membership roster, fostering a sense of community among its over 100 members. A significant feature of the site is its extensive archive of conference papers, including proceedings from the _Eastern VHF/UHF/Microwave Conference_ dating back to 2009. These papers cover a wide array of technical topics relevant to weak signal operations. The site also lists _50 MHz Beacons_ and _144 MHz and up Beacons_, along with links to other VHF and above resources, providing practical tools and knowledge for operators interested in pushing the boundaries of amateur radio communication.

Thierry LOMBRY, ON4SKY, gives advice to amateurs about lightning protection of an hamshack, including pictures and links.

On these pages you will find articles and pictures reagarding a renewed Drake TR7 by DK4DDS

A 2 element 40 meters band parasitic delta loop antenna project with pictures and details

Online calculator and a full documented pictorial guide to build a single sided 8 slot waveguide antenna

An effective multiband HF Vertical antenna, used as remote station antenna. Pictures and review of this vertical HF antenna by VK5SW

Japanese electronic parts online shop offer a wide range of products, from microchip pic to leds and batteries to any kind of connectors

If you're driving around town listening to the buzz and engine whine blues, pick up this free pub and help yourself enjoy the music. Includes troubleshooting techniques and helpful hints.

CAT5 T-568B Colour Code for RJ-45 Plug

A general article on CMC, common mode choke include a description and tipical usage.

G4ILO compares popular antennas for 2 metre band handhelds so as to see how much you lose using a small inconspicuous antenna or how much you gain by using a long antenna.

Hamradio page with pictures and links

Accurate frequency measurement is crucial for amateur radio operators, particularly when building or troubleshooting transceivers and test equipment. This resource details the construction of a _PIC microcontroller_-based frequency counter, providing a practical solution for precise frequency display. The design incorporates an LCD readout, offering clear visual feedback of measured frequencies. The counter can operate as a standalone unit, useful for general bench testing, or be integrated directly into a receiver. Its built-in offset functionality allows for seamless integration, enabling the display of the received signal frequency rather than the intermediate frequency. The project focuses on accessible components and construction techniques, making it suitable for homebrew enthusiasts. Key features include a measurement range up to **50 MHz** and a compact form factor.

Welcome to the Web page of Alpha Yankee SSTV by 14AY03 and 14AY04,many pictures,links of pages and softwares...

Many link's of other Groups, Canton Ticino and pictures of Ticino

Presents the Amateur Radio on the International Space Station (ARISS) program, a global educational initiative facilitating direct communication between students and astronauts via amateur radio. It outlines the operational framework for scheduled school contacts, detailing the technical requirements for ground stations and the typical Q&A format used during these events. The program utilizes VHF/UHF frequencies for voice and packet radio communications, enabling students to engage with crew members aboard the ISS. ARISS supports various educational objectives, promoting STEM fields through hands-on radio experience. The resource provides information on how schools can apply for contacts, the selection process, and preparation guidelines. It also covers the history of amateur radio in space, including past missions and the evolution of equipment used on the ISS. Regular updates on contact opportunities, operational status, and technical specifications for ARISS hardware are provided.

Hams have been putting stations in their cars since the Twenties. Today, there is great satisfaction in facing the challenge of installing a transceiver in our small cars and pick-ups, using somewhat inefficient antennas

A web site dedicated to collecting and restoring antique crosley tube raidos. pictures and descriptions of antique crosley tube radios from the twentiew, thirties, forties, and fifties. radio advertising from the twenties, thirties, forties, and fifties. tube box art. links to many antique radio related sites.

A clear TX wideband mod description for the FT-950. With pictures by PA1CA

May 2015 Radcom Article on common-mode chokes that can be used for control cables, phone lines, but mostly on typical HF antenna systems. This article explain what common mode chokes does, why you meay need one, properties common mode chokes should have, how to build and measure performances.

A home made field strength meter wit detailed pictures and schematic diagram by W4ZT