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Based in Huntsville AL

Dubus article about DL6WU long yagi antennas for 23 cm band Article is both in german and english. Yagi antennas are valid alternative to dishes for troposcatter operations. This article explains design and mechanical data for 1296 MHz Yagi Antennas

Matrix of several popular amplifiers currently on the market

A complete guide for newcomers edited by the Radio Amateur Society of Australia Inc. This free PDF includes several basic articles for new hams, with particular reference to Australian regulations, but is however a good guide for those who are aproaching the hobby worldwide.

A 600 volts power supply for QRO

A theoretical and experimental study of the effects of very large ground screens on 20 meter verticals

NS8O portable generators

The large listo of USA counties

BCHF 14.316 MHz Broadcasters HF NET where radio/tv broadcasters-engineers meet 2300 UTC Sunday's

A blog devoted to the hobby of Amateur Radio (Ham Radio). The radio amateurs of the world contribute to public service and emergency communications. This blog hopefully will reflect that fact!

European dealer for Ham Amplifier, amateur radio RF power amplifier by Zhong Xing

Online calculator for J-Pole antennas. The J-pole antenna consists of a short and a long vertical pole with a feed point near the bottom. The antenna looks like the letter J, hence the name J-pole antenna.

Chinese manufacturer of two way radio transceivers

Details on projects by WA3TFS published in QST magazine over the past few years. Includes an online shop with several ham radio kits, circuit boards, simple SDR transceivers

OpenRepeater is a low cost, low power, but feature rich duplex repeater controller suitable for setting up a temporary / emergency repeater systems with radios that can be run on portable power. Download the latest OpenRepeater software for your Raspberry Pi 2/3/3B+/4. This image contains everything you need to get up and running quickly.

The Central Scotland FM Group has provided and is responsible for maintaining many of the repeaters now operating in West, South-West, Central and East Scotland.

Freeware windows program that allow you to read, search and archive dx news bullettins by Alex, VE3NEA

Rotatable Antenna with Phased Elements based on the orignal design concept of HB9CV antennas, is considered to have an higher gain than standard quad antennas. The Swiss Quad Antenna does not need any spreader or boom.

Consider installing a stealth vertical loop antenna if you live in a place with no antenna restrictions. Full wave loop wire antennas allow you to be on the air without installing evidente external aerials.

A facebook group where all women and girls in ham radio can gather together to share the common interest of amateur radio.

Amateur radio map of Italy with WW locators, provinces abbreviations and Call sign Prefixes, in a A3 size PDF file free to download, made available by IU3KJL Davide

Soldering and de-soldering professionals. Provide quality stations, irons, and rework systems

Using Chokes and Traps: how to make them, how they work.

DMR Contact Manager is a Free software package designed to make it easy to maintain channel, zone, contact and call group information in these radios. It is fully compatible with the Ham-Digital and RadioID database systems and allows instant codeplug updates from a wide variety of sources. DMR Contact Manager is designed for use with Connect Systems CS700/CS701/CS750/CS800/CS801/CS800D radios, as well as the Tytera MD-380/390/390GPS, TYT MD2017/MD9600, AnyTone AT-D868UV and AT-D858, Retevis RT3, and similar radios that use the RDT/RDB file formats.

A simple Drake R-4C receiver power supply modification

dedicated to the discussion & development of ALL amateur / ham radio Digital Voice & Data communication

Naptech buys and sells quality test equipment from hp, tektronix, including spectrum analyzers & peripherals, oscilloscope, frequency counters timers, signal generators, multimeters & voltmeters, RF & power meters, microwave amplifiers

Extension of the Kenwood TS-590S Programmable Function by CT7AEZ

About experiments and measurements on loading coils using net standing wave current

Explains the proper formatting of international addresses on postal items, a critical aspect for ensuring successful delivery of QSL cards. It details how the country of origin dictates the destination country's name format, while the destination country's postal authority governs the remainder of the address. The resource highlights _Universal Postal Union_ (UPU) regulations, specifically Article RL 123.3.3, which mandates the use of roman letters and Arabic numerals for clarity. It provides practical examples, such as an item from Great Britain to the United Arab Emirates, illustrating the need for dual-language addressing. The guide also clarifies the separation of elements for proper transmission versus local delivery, ensuring that the destination country name is clearly marked in capital letters and preferably in an internationally recognized language to facilitate transit, preventing misdirection and ensuring a **99%** delivery rate for QSLs.

CB radio, marine radio and accessories

How to improve your transmitting antennas for very low solar activity periods, vertically polarized 160 meter antennas, horizontally polarized 80 to 10 meter antennas, single or stacked yagis, multi-tower stations

The New England QRP NESCAF Kit Switched Capacitor Audio Filter by N5ESE

Rock-n-rescue the source for safety and rescue equipment focused on delivering the best equipment for climbing, water fire and search rescue

VR-120 Commander is a windows programming software for the Yaesu VR-120 and VR-120D

Ham radio club deeply involved in many aspects of amateur radio

Schematic of a fast charger for Gel Cell batteries

The first interactive map of amateur radio repeaters and more updated in REAL TIME.

A squint at the world of LF This website was initially thrown together to provide ready availability to data being collected from the measurement of a transatlantic LF (Low Frequency) path.

Sams Photofact download Schematics and Service Manuals, Originals and downloads.

Signal generatos, oscillators, direct and indirect synthesizers, exciters custom oscillators

Comparing many antennas for 50 MHz band

Antenna Authority Inc. offers a wide assortment of directional, wideband antennas and other equipment specifically engineered for radio direction finding (DFing) and geolocation applications. Their product line includes _log periodic_, _cavity-backed spirals_, and _Yagi_ antennas, alongside covert antenna solutions for various operational requirements. The company emphasizes its expertise in designing and manufacturing specialized antennas for both overt and covert operations. Beyond standard offerings, Antenna Authority Inc. provides custom design services to meet specific client needs, focusing on tailored RF directional products. Their capabilities extend to developing antennas for vehicles and optimizing their operational performance in diverse scenarios. The firm is located at 3381 W. County Line Road, Douglasville, Ga. 30135-1145. Ferrel Bentley is associated with Antenna Authority Inc., which has been operating since at least 2005, as indicated by the copyright notice.

Moonbounce is the ultimate long path DX. It is exciting and allows you to literally work the world on VHF and UHF. It is not as difficult as you may think. Here is how to get started on this most exciting mode

Information on so-35 satellite

The Utility DXers Forum (UDXF) provides a centralized platform for exchanging news and information concerning utility radio stations and signals operating within the 0 to 30 MHz spectrum. It specifically excludes broadcasting, pirate, and amateur radio transmissions, concentrating instead on a diverse array of other signals. The resource details the types of stations covered, including maritime coastal and ship stations, aeronautical ground and aircraft communications (voice, HFDL, Selcalls, Volmet), military operations, various beacons (NDB, driftnet, propagation, pirate, high-frequency), fax transmissions, numbers stations, diplomatic communications, clandestines, and other unusual signals. Further content addresses radar systems such as Over-the-Horizon, Ocean Wave, and CODAR, alongside ionosondes, chirpsounders, ALE-systems, Selcall-systems, and tone calls. Experimental stations and standard frequency and time stations are also within its scope. The forum also acknowledges utility radio-related amateur events like the International Lighthouse Weekend and Night of Nights, providing a broader context for listeners. The site offers sections for modes, hardware, software, a utility radio archive, digital BC & HF conditions, and a utility radio club archive, along with QSLs and pennants.

Adding a Software Defined Radio to an SO2R station

BaoFeng UV-5RA, UV-B5, UV-82, and Yaesu VX-6R Comparison

Specialized in manufacturing measurement instruments for more than 25 years. Clamp meter, digital multimeter, analog panel meter, thermometer, and led panel meter

TA2MOG (HB9TOW) website. Ham and CB radio pages in Turkish, forum, with a summary English section. Info in visiting Turkey.