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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.

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

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.

How to make an effective RF Choke. The coiled coax choke is the easiest to make but also the least effective. This article includes some general guidelines for winding coax chokes on a 10cm PVC pipe using RG-58 or RG-213 coax cable.

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

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

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.

This software package allows you to program all types of serial programmable Integrated Circuits using Windows 95/98/NT/2000/ME/XP

Portable electronics, amateur radio, pro audio and digital cameras batteries, chargers and conditioners.

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.

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

Butternut article on radials usage on vertical and ground plane antennas

LnR Precision Inc. is a North Carolina based company that specializes in Par EndFedz amateur radio antennas and MantiZ QRP Transceivers. Their most popular products include End-Fed QRP portable antennas and HF FX Series QRP Transceivers.

Worldwide distributor of radio communications, wireless equipment, accesories and complete systems.

Mobile and Fixed-Site Radio Direction Finders

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

This is a video review of the yaesu ft-450 amateur radio transceiver. This radio operates on hf and 6m with a built in antenna tuner.

VHF RF power amplifiers manufacturerr

the biggest hamfest in texas

An homemade base plate for the hexbeam antenna

The Icom IC-7000 news

W9DC North America Amateur Radio checkpoint for IOTA Islands on the Air and WLH World Lighthouse award applications and award instructions; Island and lighthouse award links for international radio operator activities

Homemade Jeep Tailgate Antenna Mount for use with a Swing Out Tire Carrier

Largest Capacity of 200,000 MT for Towers & market leader in India with backward integrated rolling & manufacturers of Shelters, V/UHF, Patch Panel Antennas, DIAS & DWDM Equipment

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

Crossband repeat operations on the Wouxun KG-UV8D dual band multifunctional two-way radio. This demo explains differences in the cross band repeater functions of the KG-UV8D.

This is the construction of a copper cactus style j-pole antenna.

Understanding current in loading coils

Ross distributing amateur radio equipment in Preston Idaho

QST Article on what you should know about matching networks for class C RF power amplifiers

Use this online calculator to determine the length of a dipole antenna from the frequency. Both metric and English units of measurement are supported.

Manufacturer of pultruded fiberglass shapes,

A presentation of a HF multi-band sloper antenna. This antenna project is for low band operations, and antenna presented in this article works on 40 80 and 160 meters band. Article is in Polish.

11 metres d.x. group northeast england.

Collection of various Dubus articles in PDF format

Edwin H. Armstrong's foundational contributions to radio technology are presented, including the _Regenerative Circuit_ (1912), the _Superheterodyne Circuit_ (1918), the Superregenerative Circuit (1922), and the complete FM System (1933). This resource functions as a curated collection of historical documents and artifacts, many previously uncirculated, stemming largely from the _Houck Collection_. The site's purpose is to offer these primary source materials for study and enjoyment, rather than to retell Armstrong's life story, which is covered in works like Lawrence Lessing's "Man of High Fidelity" and Tom Lewis's "Empire of the Air." The collection emphasizes original documents, photographs, and equipment, all sourced from the Houck Collection unless explicitly noted otherwise. The site is structured for browsing chronologically, by selected year, or by highlight, allowing users to explore Armstrong's technical evolution. Document files are intentionally large to preserve readability and detail, while individual pages are kept concise to optimize loading times. The content provides direct insight into the technical development of radio communications.

This program simplifies the design of the single-ended Class E amplifier. Operation is intuitive and encourages "tuning" and exploration.

Schematic diagram of the VLA 200 power amplifier by RM Italy

Amateur radio online store based in CA USA

Understanding Amateur Radio NVIS Antennas and Propagation, derived from The ARRL Antenna Book and QST Articles

A Morse code TEXT-to-MIDI converter that creates a Morse code standard MIDI file from ASCII text.

A motor tuned magnetic loop antenna that can work from 14 MHz to 30 MHz

ICNIRP is a calculator software that allows you to determ safety distances for many know amateur radio antennas with respect to ICNIRP limits developed by DL9KCE

Just Learn Morse Code is a free windows software designed to make it easy to learn Morse code, as well as improve the skills of those who already know the code

Homebrew GMRS 3 Element Yagi yagi for 462-467 MHz

This web article by VK3BLG details the construction of an experimental 70cm (432 MHz) circularly polarized patch antenna, intended for satellite communication. The resource provides dimensions, feed point specifications, and impedance matching considerations for a single patch element, with discussion extending to array configurations for circular polarization. Construction involves a copper patch element on a dielectric substrate, fed via a coaxial cable. The design is based on information derived from AO-40 satellite antenna specifications, focusing on achieving circular polarization for satellite reception. The article includes specific dimensions for the patch and feed points, along with impedance values. Validation is implied through on-air satellite reception reports, with initial signal reports of **1 S-point above noise** for AO-40 beacons using a grid reflector, improving to **3-4 S-points above noise** with a 2-turn helical feed. The author references a _NanoVNA_ for impedance measurements and discusses the relationship between slot and dipole antennas in the context of patch design. DXZone Focus: Web Article | 70cm Patch Antenna | On-Air Satellite Reception | Circular Polarization

Shows which beacon is currently transmitting on the selected radio band Displays information about transmitting beacon Informs about direction and bearing from users position towards transmitting beacon

This QST article describes the electrical and mechanical design process for two LPs that cover the HF bands from 10-30 MHz

Free basic and advanced system design tutorials for every component and aspect of solar power. Plus system sizing calculators, battery bank calculators and wire size calculators