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Complete collection of the four main parts of this excellet research on modelling and designing half wave dipole antennas for 40 meters band, covering all aspects beginning from full wave length antennas, to shortened, loaded and reshaped dipoles

Vintage Tube Radio's from Germany for sale. High class restorations for all valve radios offered. Radio Brands like Saba, NordMende, Majestic, Grundig, Zenith, Philco and more. TubeRadioDoc Vintage Audio Store

Ham radio club deeply involved in many aspects of amateur radio

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

DataSheet4U is a free electronic engineering tool that enables you to locate product datasheets from hundreds of electronic component manufacturers worldwide.

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

Based in Huntsville AL

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

A simple Drake R-4C receiver power supply modification

Drake R4B receiver manual

Diary of a small contest group

An article that explain with simple concepts and basic theory the correct usage of antenna tuners. It covers some aspects of common questions newcomers have on what antenna tuners are for, and what antenna tuners will never do.

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

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

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

Free programming software for the Yaesu VX-2 and VX-2R

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

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.

Programming memories manually the Baofeng UV-5R

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

The large listo of USA counties

23cm 1296 MHz Field Day Yagi Construction, a 26 element conventional-style design. Article with several pictures and detailed homebrewing instructions

Band filters for PA6Z made by PA9M, designed by W3NQN.

A large table wit properties of popular coaxial cables

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

DXWatch provide live spots for FT5GA Glorioso dxpedition 2009

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

Converting the Jabra A210 Bluetooth Interface for Ham Radio

Litchfield County New Milford Connecticut Harwinton Warren Watertown Waterbury Washington

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.

NS8O portable generators

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

An article edited and published by Michael Mandeville on correlation of sunspot peaks and global events, like recessions or human conflicts. This document include solar cycle charts since Solar Cycle 1749-1751

Blog site for various home brew projects including antennas, power dividers etc

CB radio, marine radio and accessories

Manufactures automatic mixers, analog and DSP signal processors, room combining and matrix mixers, and audio test equipment for just about any customer application.

Information on so-35 satellite

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.

The Radio Amateur Megacycle Society

The CQ World Wide DX Contest records document top scores, with the Multi-Multi SSB category showing CN8WW achieving **78,170,508 points** in 2000. These records span from 1948 to 2025, categorizing results by region, operating class (e.g., Single Operator High Power, Low Power, QRP, Assisted), and specific bands like 10M, 15M, 20M, 40M, 80M, and 160M. For instance, EF8R (E77DX) holds the All-Band High Power SSB record with **25,747,775 points** in 2025. Each entry includes the callsign (with operator callsign in parentheses for guest ops), year of operation, and total score. The _CQ WW DX Contest_ also features records for the RTTY and VHF contests, alongside the main SSB and CW categories. QRP records demonstrate significant achievements, such as P40W (W2GD) with 5,097,780 points in the All-Band SSB QRP category in 2000. Multi-Two and Multi-Single categories are also detailed, providing a comprehensive overview of competitive performance.

Comparing many antennas for 50 MHz band

Review of the X1M HF QRP trasceiver by VE3FAL

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

Electronic and RF components for the hobbyist

Low Country Amateur Radio Club Summerville, South Carolina 147.060+ / 147.030

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

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

White Tower DX Team DX peditions and contests team from Greece

News/Projects for Amateur Radio