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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.

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.

Butternut article on radials usage on vertical and ground plane antennas

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

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

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

Mobile and Fixed-Site Radio Direction Finders

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

An homemade base plate for the hexbeam antenna

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.

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.

the biggest hamfest in texas

VHF RF power amplifiers manufacturerr

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

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

Ross distributing amateur radio equipment in Preston Idaho

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

Schematic diagram of the VLA 200 power amplifier by RM Italy

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.

Understanding current in loading coils

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

Easy to use award tracking software for ARRL, 10-10, CQ, HRN, OMISS, EPC, RAC and more.

Manufacturer of pultruded fiberglass shapes,

Collection of various Dubus articles in PDF format

11 metres d.x. group northeast england.

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

Amateur radio online store based in CA USA

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 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

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

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

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

VHF Power amplifier VLA 200 english manual

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

In this experiment the autor is going to explore the use of a 1:64 matching network on the End Fed Long Wire Antenna. Experiment will consist in build a 80-40-20-15-10 meter End Fed Long Wire Antenna with a 1:64 matching network from the documentation available on the internet

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

Limiting static surges on dipoles, verticals or end fed antennas

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

ZTEC Instruments is a pioneering modular instrument company whose product focus is oscilloscopes and function generators.

Homebrew GMRS 3 Element Yagi yagi for 462-467 MHz

Dealer for Alpha Delta hf antennas, switeches, Outbacker and super antennas, morse code keys, coax cable and military products, managed by W8GEG from Medina Ohio

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

Round-Up of different HF Upconverters for RTLSDR by KF7LZE

The TiltPlate is an antenna tilting mechanism that works with a tilt over tower and yagi to bring the antenna all the way down to ground level.

VX-6R Yahoo group

Official WEB site. Infos and News in Italian and English