Search results

Ascension Ham Radio Club based in Gonzales Louisiana

Australian antenna manufacturer, Mobile 1 CB Radio Antennas, Mobile Phone Antennas 3G, NextG, EDGE Digital Radio & TV Antennas Broadcast Band Antennas Airband Antennas Amateur Band Antennas Scanner Antennas Commercial Antennas

On December 12, 1901, Guglielmo Marconi successfully received the first transatlantic wireless communication, a Morse code "S" (three dots), at 04:30 GMT. This article details the setup for this groundbreaking experiment, noting Marconi's receiver in St. John’s, Newfoundland, Canada, utilized a _coherer_ and an antenna elevated by balloons and kites. The transmitting station at Poldhu, Cornwall, England, featured twenty-four 200-foot ships' masts and a 25-kilowatt alternator. The resource explains how this contact disproved contemporary beliefs about radio wave limitations due to Earth's curvature, later understood through _ionospheric propagation_. It frames Marconi's achievement as the "very first DX" in amateur radio terms, defining DX as telegraphic shorthand for distance and _DXing_ as the hobby of receiving distant signals. The article also provides external links for further reading on Marconi's experiments and the science behind transatlantic radio signal reception.

Article on operating aids and band usage during solar minimun periods. Author tries to explain what can we expect on the HF bands during a solar minimum period and which approach to be used to understand band openings.

C.C.F. web site by Contest Club Finland editor of the pileUp newsletter

Ham or amateur radio is a fascinating hobby for all

Live police radio feed from Gippsland Police Region 5 Division Q1 and Q2. Victoria Australia

Harris DMR Manufacturer, provides advanced, technology-based solutions that solve government and commercial customers' mission critical challenges

JTAlert provides several audio and Visual alerts for WSJT-X & JTDX software. JTAlert generate audio and visual alerts for several alert conditions, logs automatically to several ham radio log books software like hrd dxkeeper,log4om, interoperates with web services and it supports dxlab suite.

The Michigan Radio Amateur Youth Network (MRAYN) aims to centralize resources for young operators across Michigan, fostering engagement in amateur radio. This initiative brings together various youth-related clubs and activities, providing a dedicated platform for information exchange and participation. The network supports educational efforts and promotes the hobby among younger generations, ensuring continuity and growth within the amateur radio community. Corey Bulock, KD8BOQ, is listed as a key contact for MRAYN, indicating active leadership in coordinating these youth-centric endeavors. The network's focus includes organizing events and sharing relevant content to keep young hams informed and active. By consolidating information, MRAYN simplifies access to opportunities for youth interested in two-way radio communication, from basic licensing to advanced operating techniques.

An home made multimeter using a SparkFun multimeter kit, includes a time lapse movies of multimeter kit assembling

Eastern and Mountain District Radio Club

This EXCEL Program Worksheet calculates the safe operating conditons for a toroidal transformer operating between 1 and 50 MHz. Manufacturer data for complex permeability, magnetic dimensions, and saturation flux density must be available. Some core types which are commonly used in amateur transmission are included. The program produces limiting winding voltages for linear operation and temperature rise over the range of frequencies and power specified.

Sell generator, and generator parts from generac, guardian, asco, and more

Kirisun a fully indipendent company on the professional radio communications equipment incuding DMR, portable two-way radio and mobile radio and repeaters.

Mirage BD-35 2M/70CM RF amp high SWR, how to troubleshoot

Amateur Radio operators from the area around the town of South Lyon in Southeastern Michigan

One common semiconductor material, silicon, is far more widely used in electronics than germanium, partly because it can operate at much higher temperatures. Semiconductors are crystalline materials with electrical resistivity values between conductors and insulators, whose conductivity can be altered through _doping_ with impurities like arsenic or phosphorous to create N-type (excess electrons) or P-type (electron vacancies) materials. Semiconductor devices, such as diodes, transistors, and integrated circuits, leverage these properties to control electron flow in circuits. A diode, a two-terminal device with an anode and cathode, primarily permits current flow in one direction, making it useful as a rectifier to convert AC to DC. Specialized diodes include Zener diodes for voltage regulation and Light-Emitting Diodes (LEDs) that produce light when current passes through them. Logic circuits, fundamental to digital electronics, have binary inputs and outputs, performing functions like AND, OR, and NOT gates, and can be constructed from various binary devices including solid-state diodes and transistors. A transistor is an active semiconductor device with at least three terminals (base, emitter, collector), capable of amplifying current. Integrated circuits (ICs), often called chips, are electronic circuits built on a semiconductor substrate, typically silicon. ICs are classified by transistor type (bipolar or MOS) and integration scale: Small-Scale Integration (SSI) with fewer than 10 transistors, Medium-Scale Integration (10-100), Large-Scale Integration (LSI) with 100-1,000, and Very-Large-Scale Integration (VLSI) with more than **1,000** transistors. ICs can be analog, digital, or hybrid, offering virtually limitless functions.

Stuff about amateur (ham) radio, especially VHF/UHF, QRP, portable and mountaintop operating

Raivavae Austral Islands by Don, VE7DS and Dave, K3EL as TX5RV

APRSTT translate-O-Matic convert online your callsign in DTMF

Club in Cleveland, White County, Georgia, promoting friendship, mutual assistance, and learning.

Personal HamRadio Blog

Japan Ladies Radio Society

Tektronix Oscilloscope Tutorial Learning Center, includes tutorials for understanding oscilloscope basics and operation.

Contest station situated in the South West part of the Netherlands in the province of Zeeland

An Android based CW practice program based on simulated QSOs. The app will generate Morse code sounds from 5-50 words per minute.

Remembrance Day Contest Logger free Windows software. Remembrance Day is a popular contest in Australia.

DX Pedition to St Helena 10-80 meters bands SSB RTTY FT8 CW by G0VDE

This project describes a DIY all band HF SDR transceiver. Built around a Softrock 6.3 kit, it boasts a 20W homebrew amplifier and ATmega168 microcontroller for USB control. An LCD displays frequency, power, and SWR. Automatic LPF selection and SWR protection enhance functionality. Compatible with Rocky and PowerSDR software, this project provides a cost-effective and powerful HF SDR transceiver for hobbyists.

Die kontestgruppe dk0bn

Amaterur radio blog from Cordoba Spain

Reivews of the Icom IC 7100 HF VHF UHF transceiver

Internal Bluetooth interface for miniVNA, Bluetooth connection to the PC allow Full cordless operation with ao external components

Lightning Arrestors, High current filters manufacturer

Vacuum tubes and more from the tubular years

A comparison of Elecraft KX2 and Yaesu FT-818

Papua New Guinea 2011 DX pedition official web site

Remote Ham Radio via WebRTC Audio Raspberry Pi 3. Stream Transceiver Audio to and from the remote station though a Browser using WebRTC.

Transverter for 13 cm 23 cmd and 33 cmd band. 23 cm RF power amplifier, RF power amplifier for 2.4 GHz for the QO-100 satellite. Popular for the 1296 MHz transverter

Virtual Signal/One Radio Museum

Single operator two radios, resources controllers and products

Amateur Radio Store, dealer for DXZkit products, Heil Sound, Arrow, Miracle based in Northern Colorado

VP2ERM will be operating from the Caribbean island of Anguilla between July 19 - August 3, 2014

NJ2X is a licensed amateur radio operator (FCC Amateur Extra) who enjoys casting electromagnetic waves into the ether. NJ2X pursues many aspects of the hobby including chasing DX, participating in mini-DX expeditions, building equipment and antennas, and papering his shack walls with ARRL awards. NJ2X dedicates this amateur radio oriented site to helping others who also enjoy the greatest of scientific hobbies. The site is suitable for all readers - families, the young, and the young at heart.

Voted the best darn Ham Radio club in Texas 7 years in a row.

The AA4F Key Contact Cleaner is designed for maintaining key contacts, ensuring reliable operation in 2-way radio communications. **Regular use** of this cleaner can significantly improve contact performance, reducing the risk of intermittent signals. It is particularly effective for cleaning contacts on various key types, including _straight keys_ and _paddles_. Proper maintenance extends the lifespan of your equipment, ensuring consistent operation during contests and DXing activities. Users report improved key responsiveness and reduced key chatter, which is crucial during high-pressure operating conditions. Regular cleaning can prevent oxidation and buildup, which can lead to erratic key performance. This product is essential for serious operators who rely on their equipment for successful communication.

The Baofeng UV-5R handheld transceiver, introduced around 2012, operates across the 2-meter (144-148 MHz) and 70-centimeter (420-450 MHz) amateur bands, offering dual-band receive and transmit capabilities. This review provides an early assessment of the radio's form factor, user interface, and general performance, noting its compact size and the inclusion of a **VFO/Memory mode** button for frequency management. The device supports both FM and narrow FM modes, with a reported power output of 4 watts on VHF and 3 watts on UHF, making it suitable for local simplex and repeater operations. Key features discussed include its 128-channel memory capacity, a built-in VOX function, and a **DTMF keypad** for tone dialing and repeater access. The review highlights the radio's ability to scan frequencies and memories, along with a dual-watch function allowing simultaneous monitoring of two frequencies. Battery life is addressed, with the standard 1800 mAh Li-ion pack providing several hours of operation depending on transmit usage. Initial impressions cover the radio's construction and the clarity of its LCD display, which shows both A and B band frequencies.

Conneaut Amateur Radio Club Ohio W8BHZ yahoo group

Homemade a custom programming cable that can works with Kenwood TM-V71A or TM-D710A