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ARA was founded on 1976 by a group of hams on the island of St. Miguel aiming to create the first civil Radio Amateur club,located in Ponta Delgada.

House of Batteries is a master distributor and custom battery pack assembler for every major battery manufacturer in every battery chemistry for every electronic application

Small Parts, Inc. has been supplying top quality Materials, Components and Tools to Researchers and Developers since 1963.

Maintenance of Antenna Tower Systems, Antenna tower foundation analysis and repair, Tower troubleshooting and repairing

Make your own battery clip by nj2x

This article is about a home made project of a whip antenna for 2 meters band. Includes lenght of whip for all frequencies from 140 MHz to 151 MHz both in mm and inches

A summary, overview or tutorial covering the basics of Meteor Scatter or Meteor Burst Communications, a form of radio signal propagation often used at VHF.

Near Vertical Incidence Skywave propagation is a form of radio wave propagation used on the MF and HF bands to provide radio communications and broadcasting coverage over short distances, especially where the terrain contains obstacles.

An inverted V Dipole antenna for HF bands, working on 10 20 40 and 80 meters band. PDF Presentation

The Alcorn County ARES group provides crucial **emergency communications** support within Alcorn County, Mississippi, operating under the Amateur Radio Emergency Service framework. This organization mobilizes licensed amateur radio operators to assist public safety agencies during emergencies, natural disasters, and other critical events when conventional communication infrastructure fails or becomes overloaded. Their activities include regular training exercises, participation in local drills, and maintaining readiness to deploy communication assets. Members engage in various aspects of amateur radio, including voice, digital modes, and message handling, ensuring a robust and redundant communication network. The group's focus on preparedness and community service aligns with the core principles of ARES, emphasizing rapid response and effective information relay during crises. They often collaborate with local emergency management agencies, such as the Alcorn County Emergency Management Agency, to integrate amateur radio capabilities into broader disaster response plans. Dustin Brumfield, KD5LAP, serves as the Public Information Officer, facilitating outreach and coordination. The club's operational area is specifically Alcorn County, Mississippi, contributing to local resilience.

AMSAT is a worldwide group of Amateur Radio Operators who share a common interest in building, launching and communicating with each other through non-commercial Amateur Radio satellites.

Drake R-4C Receiver Manual (Early Version - 6HS6)

Elk Antennas to give the Ham log periodic antennas with the best gain, directivity, and front to back ratio possible for the size and price.

Features the highest quality, brand-name solar panels in the market, including BP, GE, SolarWorld, Sharp.

PhaseFree, Inc. Surge Suppression. Provide customers with the safest and highest quality surge suppression on the market. Providing surge suppression for the Navy's MARS stations protecting their investment.

13PR184 - Michael's Website

International ham radio club of Belarus

Ham radio shop based in Holland, dealer for cb radio products, amateur radio transceiver,Yaesu Icom and Kenwood, antennas cables and accessories

Display your current Maidenhead locator with 10 digit precision. It also computes bearing and distance to a set of target locations using locator or latitude / longitude. Useful to align antennas in VHF / UHF / microwave DX activities. No network or fancy maps usage, so it can be used even in remote locations.

The ICOM IC-7610 SDR HF/50MHz Transceiver Basic Manual in English PDF File 13 MB

The 2200-meter band (135.7-137.8 kHz) presents unique challenges for amateur radio operators due to its narrow 2.1 kHz bandwidth, low signal levels, and high noise. W1TAG explores various transmission modes suited for this demanding environment, highlighting that traditional voice modes like SSB and AM are impractical. Plain old CW serves as the baseline, demonstrating effectiveness across different modes, though signal-to-noise ratio (SNR) significantly limits practical speeds. The article notes that reducing CW speed below 5 WPM can improve copy, especially with computer-aided spectrum analysis software capable of decoding signals too weak for human ear reception. QRSS, or "CW sent slowly enough that speeds are best expressed in seconds per dot," is a key mode for LF work, with examples ranging from 3 seconds/dot to extreme 240 seconds/dot transmissions. _Argo_ by I2PHD is mentioned as a simple program for QRSS, enabling reception of signals like BRO, a Part 15 beacon, at a distance of **1100 miles**. Other modes discussed include Dual Frequency CW (DFCW), which uses frequency shifts to distinguish dots and dashes, and Binary Phase Shift Keying (BPSK), a phase modulation technique employing 0 to 180-degree phase flips. WOLF (Weak-signal Operation on Low Frequency), a specialized BPSK form by KK7KA, encodes 15-character messages into 960-bit packages, taking 96 seconds to transmit, and has demonstrated successful reception over **672 seconds** for a message from a 1-watt beacon. Further modes include PSK, FSK variations like JASON and MSK, and graphical modes such as Hellschreiber and Chirped Hell. The article concludes with a practical chart comparing the time required to send a simple message like "WD2XES FN42CH " across these diverse LF modes, offering valuable insights for operators planning contacts on the low bands.

Roach pole vertical antenna for 40 and 30 meters band featuring good performance on short skips contacts compared to wire dipole

Horizontal polarized omni directional 50MHz Antenna. This antenna is intented to use in a contest station as a second system beside the stacked yagi beam system. An omnidirectional systeem can be an advantage when it comes to short openings on wich the operator must react quickly.

An Amateur Radio enthusiast living in the North of England. A keen DXer and Contester.CoSysop GB7MBC DXCluster. Member of Sands Contest Group MX0SCG/M0SCG

M5AML - SSTV, Aerials (antennas), SSTV, Rallies, UK prefixes

NOAA Satellite Signals With a PVC QFH Antenna and Laptop, this website also link to a github where you can find files and supporting documentation for constructing a QFH Antenna

Electric Fields, magnetic fields, electromagnetic fields, losses, fresnel zone, nearfield and farfield

Dx on Hf specially on low bands from Zante island Greece

A page dedicated to top band transmitting equipment and operations by VK3YE

Software to create virtual com ports when you need to assing different serial ports and you have just one COM port on your PC. Commercial version

Official aprs.fi iOS app, immediate real-time visibility to APRS traffic near you and around the world.

Amateur radio antenna maker with online shop based in Brazil

Listen to online police scanner from Douglas County in Oregon USA

SDR software for SDRPlay RSP1, RSP1A, RSP2, RSP2PRO. SDRuno is an advanced Software Defined Radio Application platform which is optimized for use with SDRplay's range of Radio Spectrum Processors

Biafra nation

Ham Radio News, Information, and Operating Activities of Ron, WD4AHZ

Sleeping tecniques during contest operations. This article originally appeared in the National Contest Journal.

Radio frequencies for Bergen County located in Northern New Jersey

The Japanese-made Maldol MFB-300 HF vertical antenna offer extremely wide-band performance, with a specified frequency range of 1.0-60 MHz.

OpenHamClock is a modern, open-source dashboard for amateur radio operators, designed as a web-based successor to the original HamClock. Deployable locally on a Raspberry Pi or via the cloud, it centralizes essential DX operations into a single, intuitive interface. At its core is an interactive world map that visualizes real-time DX spots, signal paths, satellite tracking, and POTA activators. The software seamlessly integrates critical tools like WSJT-X, DX Cluster, and PSKReporter for monitoring digital traffic. Additionally, it provides vital environmental data, including real-time space weather indices, solar activity, and personalized HF propagation predictions. With customizable themes and a modular architecture, OpenHamClock offers modern operators comprehensive, at-a-glance situational awareness of global radio conditions

The basics of radio receiver dynamic range performance used for specifying the performance of radio receivers used in radio communications systems.

The GN9120 is an excellent bluetooth type headset. Here an article about GN9120 Wireless Headset Conversion for Ham Radio with PTT

The largest range of electronic components

Fixing the problem with VHF-LED coming on while transmitting UHF

There are a number of important technical issues relating to the matching of speakers to amplifiers, and to the wiring of multiple speaker systems

Sketch for an Arduino and si5351 to implement a VFO, BFO, CW, keyer, and control

The Canadian Vintage Radio Society, and its bimonthly publication, Canadian Vintage Radios, is dedicated to the preservation, restoration, collection and enjoyment of antique radios

Abbreviations used in CW operation

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