Search results

Electronics and Radio Today for electronics and radio information, projects parctical information and introductory articles. Especially useful for those taking GCSE Electronics in the UK and around the world.

Repair & Restoration information in UK

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.

Repair and Restoration Services in Orlando USA

Includes W1BB Stew Perry letters, and a sample QSL cards of dated 1963

HF Radio Contesting and personal information: Latest scores, station tour, DL contest records and large photo section, maps and software

Listen to Oklahoma city police scanner, oklahoma, moore ok county.

A Ham Radio Newsletter dedicated to HF communications and the PACTOR user

The BP-3 was a valve-based spy radio transceiver, developed during WWII by Tadeusz Heftman of the Polish Military Wireless Unit in Stanmore (UK). It was introduced in 1943 and was intended for use by Agents and Resistance Organisations in Europe. The transmitter produces an output power of 50 Watts in CW

Transverters-Store is a online shop for low cost transverter boards, but also QRP transceivers, Active antennas, RF bridge and probes, Mic equalizers and other amateur radio accessories

List of scanner frequencies used in the US for emergency or inter-agency communications, allocated nationally.

A trap on the coaxial cable, also known as choke, helps to eliminate the sneaking of the reflected RF- energy to the shack. The trap can be made from the coaxial cable that feeds the antenna

PSK31 News, Contests, Information, Forum, and more Find a helpful community and information.

Test equipment maker, digital oscilloscopes, generators and counters, multimeters, logic probes testers and more

AF6SA USB antenna AZ-EL rotor controller compatible with Yaesu G-5500, G-450, G-650, HY-Gain and other AC motor rotors

Radio wave propagation, Principles of transmission lines, Antennas

Heathkit SB-220 Amplifier modification by KE5YA

Software Defined Radio manufacturer, SDR-IQ NetSDR SDR-IP and IF-2000

Toronto Surplus , antique radio, test equipment, rf parts

This project produces a sturdy tripod for small vertical antenna support using readily available electrical metal tubing (EMT) or conduit

List of instruction manuals for hamtronics products

Vanuatu - YJ 2010 - DXpedition info and online log

Look for free manuals (download) in amongst paid offerings for test equipment manuals. The freebies page also has mostly ham material. We do also sell major ham collections at pretty much close to our production and distribution costs.

Electronic surplus dealer with online catalog

This page describes a cheap, weather-resistant and readily available type of antenna wire by HAMwaves.com

Icom Remote Control Software for windows remotely control Icom transceivers through an IP Network

The Northern Ohio DX Association (NODXA) operates a voice repeater on 147.36 MHz with a +600 kHz shift, utilizing the club callsign W8DXA. The organization provides an award program for contacting its members and offers DXCC and Honor Roll patches to recognize member achievements. NODXA publishes a monthly newsletter containing DX information and meeting minutes, with a recent brochure and membership application dated May 2024. The club actively promotes DXing, allocating a portion of its finances to support DXpeditions, and several members have also financed their own expeditions. The NODXA roster was last updated in June 2015, and a list of supported DXpeditions was revised in June 2024. Tedd Mirgliotta, KB8NW, serves as the club president and is the editor of the OPDX Bulletin, a widely distributed internet and packet cluster resource. Meetings are held on the first Monday of each month at Amici Italian Restaurant & Bar in North Royalton, Ohio, located at 13000 Royalton Road, near the intersection of Route 82 and W.130th Street. The club leadership includes Dennis Stuber, K8LBT, as Vice President; Glenn Williams, AF8C, as Secretary; and Mary Michaelis, N8DMM, as Treasurer.

Scanning Paulding County, Georgia Sheriff, Fire, and EMS

Telecom Product Profiles is a manufacturers' rep firm specializing in factory direct Nello Towers, monopoles, antenna mounts, shelters, and more. Factory direct Cellular, PCS, and Wireless Broadband equipment such as antennas, radios, and more. Installation, financing, and leasing options available.

Technical supplement with schematics of the Yaesu FT-2800M Yaesu Transceiver

Modification of the Bill Petlowany, K6NO antenna by N0LX

After you have build this antenna, you may not need anything else. This article shows how to build a VHF j-pole antenna and how to protect it by inserting it into a PVC tube, the correct way.

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.

The online review site that learns what questions that you need to focus on most. Focusing on amateur (ham) radio exams

VHF UHF half wave flower pot antenna project by VK2ZOI

This database is not a logging program. It is intended to collect information about the HAMs that you know. You just record the call sign and name of a HAM that you meet. Later you can use QRZ to look up the call sign to validate that it matches the name.

Over 4000 ham radio links

In this article the author describes some new designs of ferrite loaded chokes for suppressing unwanted common mode currents at HF applied to feed lines like choke baluns, but also in the shack, applied to various coaxial, mains and data cables

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.

The main function of the Ugly Balun is to help eliminate rf currents from flowing on the outside of coaxial cable using the principle of choke action.

W4TI Review of the ICOM 735

The HotPaw Morse Code Decoder application for macOS processes audio input to transcribe Morse code characters into text. It presents both an audio spectrum graph and a tone amplitude graph, which aid in configuring a narrow band audio filter. Operators can set the audio filter for tone frequencies between 400 and 1600 Hz, optimizing reception for various CW signals. The software offers user-configurable settings, including WPM dot/dash speed detection, a noise threshold level, and the option to use Farnsworth timing for inter-character spacing. The Morse code WPM detection automatically adapts from approximately 8 to 40 WPM, with a lock feature for the estimated speed. A High Speed WPM Mode is available for code speeds ranging from 40 to 80 WPM, catering to faster CW operators. The application's decoding performance is influenced by signal level, signal-to-noise ratio, frequency and WPM stability, keying quality, and proper configuration, with an initial learning phase required for WPM estimation to stabilize. An external microphone or line-in may be necessary for optimal performance on some MacBook models to mitigate fan noise or room reverberations. Version 1.4.4, updated on November 11, 2021, includes compatibility improvements for newer macOS releases. The developer, Ronald Nicholson of HotPaw Productions, does not collect any user data from the application.

Large picture and specifications

An indeal stealth antenna made by multiple quarter wave verticals, supported by a tree.

A pdf file with drawings and instruction to properly assembly and solder most popular coax cable connectors

A conversion of a 80m dipole into a 160m vertical antenna

Examines the historical role of telegraphy within Canadian railway operations, detailing the evolution of communication systems crucial for train dispatch and coordination. It covers the technical substance of railway telegraphy, including equipment, operational procedures, and the personnel involved, such as agents and operators. The resource provides insights into the **F59PH locomotive** history, development, and components, alongside diagrams of various parts like antennae and traction motors. The content also explores the practical application of these systems by documenting specific railway events, such as the CPR Galt Sub operations from 1895-1971 and GO Transit's operational history. It includes photo galleries, schematics, and diagrams of locomotives and cab cars, offering a visual and technical comparison of different railway equipment. The site also features information on **GO Transit** rolling stock, including MP40s and commuter coaches, providing a historical context for railway communication and transportation.

The Icom IC-7300 is a popular HF transceiver among amateur radio operators, known for its advanced features and ease of use. However, integrating it with software like Ham Radio Deluxe (HRD) can be challenging due to compatibility issues. This guide provides step-by-step instructions on how to configure the IC-7300 to work seamlessly with HRD 5.24, the last freeware version available. It covers the installation of necessary drivers, setting up virtual COM ports, and configuring audio settings for digital modes. To begin, users must download and install the Icom USB driver, which creates a virtual serial COM port for communication between the radio and the computer. The guide details how to check for this new port and adjust the CI-V address settings to ensure proper communication. It also explains how to set up the soundcard settings in HRD for digital modes, allowing operators to transmit and receive audio effectively. Following these instructions will enable IC-7300 owners to maximize their radio's capabilities with HRD.

A home made VHF 2.5kw RF power amplifier made with a GS35B Triode and designed by Frank F1CXX built in 2003

Use this online calculator to determine the length of a full-wave loop antenna from the frequency. Both metric and English units of measurement are supported. Quarter-wave matching section lengths are also calculated.