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The ECHO-ECHO group is an International Radio Club of 11 meter operators. The Group was founded on spring 1989 in Warszawa, the capital of Poland, to study propagation and to promote friendly and brotherly relations among radio operators in the world.

Flash Movie describing HF (shortwave) radio propagation to beginners. Very helpful aid in understanding.

This article will help to unravel some of the mysteries as well as giving useful operating tips to maximize your chances of working that rare station

A comprehensive resource center with DX aids, live propagation, callsign searches, news and bulletins, maps, and more by NW7US

The Daily DX is a text DX bulletin sent via e-mail. To subscribe you have to pay for the daily or weekly subcription and you will receive DX news to your home or office by e-mail Monday through Friday, 50 weeks per year. Includes DX news, IOTA news, QSN reports, QSL information, a DX Calendar, propagation forecast and much, much more.

Amateur radio propagation studies (science, research, engineering, operating) and the BeamFinder propagation analysis software

A 70cm and 2m 6 elements yagi antenna plan based on the IEEE Transactions on Antennas and Propagation

DX Propagation by DR2W! High resolution SNR maps in pseudo color. Propagation based on the actual sunspot number.

Shortwave Monitoring Station in Berlin: DX news, HF propagation, greyline, DRM news, QSL gallery, audio recordings and more

Information and tutorials about all aspects of radio and electronics including propagation, ham radio, electronics, radio history, etc

WB4WOR Propagation Beacon on 6 and 10 meters Jointly Owned and Operated by the Broadcast Packet and Repeater Group and Piedmont Amateur Radio GroupRandleman, NC USA

Thierry LOMBRY, ON4SKY, develops in several long articles the bascis of propagation. His website includes also a French section dealing with auroras.

Maps and propagation indices

Understanding Amateur Radio NVIS Antennas and Propagation

As the sunspots return and DX propagation conditions to improve, the age old problem with QRM begins to show up on the amateur bands. Thif filter help you on improving reception

Complete introduction to Shortwave radio, includes Qsl gallery, Propagation, Beacons, Contest, Begginers guide, in Spanish

Info and specifications on my three beacons on 10 and 6 meter bands. You will find also informations on the propagation for these two band.

Paul Harden NA5N has produced a superb guide to solar activity and HF propagation for the QRPer

Using the Raspberry Pi to operate Weak Signal Propagation Reporter

Explore this high-resolution ITU Zones Map, a critical reference resource for amateur radio operators, international broadcasters, and telecommunications engineers. Originally established by the International Telecommunication Union – Radiocommunication Sector (ITU-R) Broadcasting Services Division (1999), this chart accurately divides the globe into 90 specific CIRAF zones. This authoritative visual guide is indispensable for planning High Frequency (HF) radio propagation, scheduling international broadcasts, and verifying locations for radio contests and awards. Distinct from the 40 CQ Zones, the ITU zoning system provides the official administrative framework used for global frequency management. This digitally enhanced version ensures maximum clarity of zone boundaries and numbering (e.g., Zone 28 for Central Europe), making it an essential tool for technical accuracy in logbooks and station management. It serves as a trustworthy standard for educators, hobbyists, and industry professionals alike.

HF beacon monitoring. Check world-wide propagation, updated every 15 minutes.

Dedicated to 50MHz and 144MHz. Online 2m and 6m logs. Real Audio sound clips of Tropo, Aurora, Sporadic E, Meteor Scatter, TEP and F2 Propagation.

Whith more than 20 years of ham practicen SWL Thierry LOMBRY, alias ONL5183, has written several technical pages about ham activities, including propagation, radio perturbations, radioastronomy, DXing, QSLing, ham-spirit, review of material and more. This very interesting website is completed by a large French section devoted to amateur astronomy illustrated with vivid colors pictures.

W1AW Propagation Bulletins for 2001

Dish antenna and its theory and design for high performance applications such as satellite transmission and reception as well as microwave links. Parabolic Reflector Antenna: Dish Antenna The parabolic reflector antenna which is often called the dish antenna provides an antenna solution applicable for VHF and above where high gain and directivity are needed for all type of radio communications and radio reception.

PalmProp is a software for PalmOs dedicated to the forcast of HF radiowave propagation by f5hla

Radio wave propagation, Principles of transmission lines, Antennas

Website for radio Amateurs in the Hastings, Peterborough, and Northumberland Counties of East Central Ontario, Canada. Propagation information as well as antenna designs and home brew projects and Club News. Many links to Amateur Radio information

Radiowave propagation in the medium and high frequency spectrum in DOC format

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

This page is about the RSGB's Propagation Studies Committee, its work, services and current projects, together with guides to where to find more about matters relating to propagation on the Internet at all levels from introductory to professional. Watch this space!

Kingston Amateur Radio Club Articles Dave Lawrence, VA3ORP

Notes on using the QST propagation charts to determine propagation conditions

The NDB List is a private group for DXers who are interested in Non Directional Radiobeacons, MF, HF & VHF Propagation Beacons, Cluster Beacons and all kinds of other radiobeacons

DXnews links and propagation

11 Years of monthly propagation reports from February 1988 to January 1999 by AD5Q

Discussion groups for Shortwave Listening, Propagation, Amateur Radio, and related topics.

Layman level explanations of "seemingly" mysterious LF MF and HF propagation occurrences.

With spectrum analysis of beacon signals, it's possible to see features relating to various propagation phenomonen.

Real-time dashboard with 3000km optimal working & maximum usable frequency as well as maximum NVIS frequency; all for your internet access location.

HFpack provides an information exchange about transceivers, antennas, systems, HF packs, propagation, new developments and techniques in HF portable operation. Radio Amateurs are invited to participate in egroup and on-the-air nets around the world.

An information paper by the International Amateur Radio Union, History of 40m allocation, propagation properties of 7 Mhz band

Port of the popular VOACAP program, HF propagation prediction tool. It may be compiled using the GCC GFortran compiler

A small collection of bash scripts for pulling QTH info, grid square info, propagation charts, and monitoring prop logger postings.

Operational mode QRPp QRSS Running as an MEPT Manned Experimental Propagation Transmitter

Solar data with current solar status, forecast and propagation report

The author explores the VP2E antenna, introduced by Ed Durrant DD5LP, for Portable Operations on the Air (POTA). Detailing its unique design, successful trials, and an unexpected propagation twist, the VP2E proves a promising addition to the author's portable antenna arsenal.

Propagation in the LF-Band

Solar activity can aid or hamper HF propagation beyond line-of-sight range, WA1SVF and N6BV answers to questions about Sun influence on radio signals propagation

This map shows real-time radio propagation from stations operating on 11 bands between 1.8 and 54 MHz in the amateur radio service. The display shows world-wide activity from the last 15 minutes and is automatically updated about every minute. Data for the map is gathered from several online sources: WSPRnet, Reverse Beacon Network (CW, FT4, FT8), PskReporter, and DX Cluster.