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The home page of the boca raton amateur radio association. we meet on every first tuesday of the month and operate the 145.290 repeater. Palm Beach County, Florida. -
European supplier of radio communication receivers and scanners, transceivers, antennas, cables, connectors, GPS and accessories based in Prhaha Czeck republic. -
F.A.R.G. The Friends of Amateur Radio Group Home Page.A fraternal organization dedicated to the advancement of Amateur Radio. Many links , Club roster. -
TAPR, an international organization dedicated to amateur digital communications, is pleased to present this collection of information about TAPR, via the World Wide Web. -
This large, colorful wall map features current geographic detail and labels, grid squares, call sign prefixes, boundaries and more. -
A Morse code TEXT-to-MIDI converter that creates a Morse code standard MIDI file from ASCII text. -
Decibels: dB, dBA, dBC, dBV, dBm and dBi? What are they all? How are they related to loudness, to phons and to sones? This page describes and compares them all and gives sound file examples. -
Understanding Amateur Radio NVIS Antennas and Propagation, derived from The ARRL Antenna Book and QST Articles -
BRATS amateur television, amateur radio, and public service, Baltimore Radio Amateur Television Society -
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. -
A multiband coax trapped dipole for 10-80 meters bands by DF1PU -
A motor tuned magnetic loop antenna that can work from 14 MHz to 30 MHz -
Article on the Dentron MT-3000A antenna tuner and some good modifications by W1AN -
Vacuum Tubes and Radio Tubes Our specialty. We carry over 5,000 radio and vacuum tubes in stock every day and we ship world wide. Tubes for industry, music, ham radio, the audiophile. -
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An high gain long yagi antenna, seven elements, for six meters band -
Easy to use award tracking software for ARRL, 10-10, CQ, HRN, OMISS, EPC, RAC and more. -
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 -
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 -
The Skywide Club, established in 1952, has been serving the amateur community for four decade -
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This is the official site of the Milan branch of A.R.I. -
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 -
The Research and Documentation Center for the History of Radio Communications and the Electronic Media (our full name) is the world's biggest organization to collect, save, research and present whatever relates to the history of radio communications, particularly amateur radio and broadcasting -
Professional award management program, currently only in german -
Amateur Radio Web based logbook, initially linked to ham radio deluxe log and now supported by other popular log book programs, permit to publish a searchable contacts log, maps logs, and display a timeline of contacts. -
A review of the Yaesu FT-857D mobile transceiver by yo3hjv -
A premier site for antique radio collectors featuring articles, and tips on restoration and troubleshooting -
A PIC Programmer for Windows, support for dsPIC, PIC10F, new PIC12F6xx family, PIC16F9xx, PIC18F -
The East Tennessee DX Association (ETDXA) is an amateur radio club that welcomes all experience levels. They focus on a variety of activities including DXing (long-distance communication), contesting, and general ham radio topics. Their goal is to create a community of radio enthusiasts who can learn from each other and enjoy the hobby together. They also aim to promote the art and science of DXing while representing East Tennessee on the international amateur radio scene -
F6KIM amateur radio club based in Nancy -
This QST article describes the electrical and mechanical design process for two LPs that cover the HF bands from 10-30 MHz -
A chart presenting the results of impedance measurements made on a variety of common-mode choke implementations across the frequency range 1MHz to 30MHz by G3TXQ -
FQ Elettronica ham radio online shop in Latina Italy -
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 -
Picture taken from official manual with notes on tuning stubs for each band -
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ZTEC Instruments is a pioneering modular instrument company whose product focus is oscilloscopes and function generators. -
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 -
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. -
Web Morse Runne is an online CW (Morse code) contest simulator developed by DJ1TF - Thomas Fritzsche. This tool allows users to practice their Morse code receiving and sending skills in a simulated contest environment. Key configurable parameters include CW speed, with options ranging from 300Hz to 900Hz, and RX bandwidth, adjustable from 100Hz to 600Hz. Users can also set a monitor level and simulate various band conditions. The interface includes counters for calls and QSOs per hour, along with a timer. Pre-defined function keys are available for common contest exchanges such as F1 (CQ), F3 (TU), F6 (B4), F7 (?), and F8 (NIL). The simulator is designed for ham radio operators looking to improve their CW contesting proficiency. -
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Project with pictures and plans for an HF off center fed dipole by KB1NWH -
VHF Power amplifier VLA 200 english manual -
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Digital Amateur Television web sited include a D-ATV transmitter, D-ATV receiver, D-ATV modulator D-ATV schematics by RA3TTS -
An omnidirectional and horizontally polarized VHF antenna by EA4EOZ