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Antenna Diversity - Single antenna with multiple polarization for diversity, diveristy receivers and propagation effects on signal polarization

The Optimum 6 Element Yagi-Antenna - A 70cm and 2m 6 elements yagi antenna plan based on the IEEE Transactions on Antennas and Propagation

LogView - LogView is a FREE post-contest log-visualisation tool, for analysing contest performance. It plots the QSOs in a Cabrillo-format contest-log on to one of 8 different maps by finding the position of each QSO from an online database of about 970,000 W/VE callsigns.

The NDB List website - 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

OE3XAC Beacon - 10 Meter Propagation Beacon OE3XAC

N4PAL Propagation Beacon - N4PAL 10 Meter, 28.214MHz Radio Beacon Site Information and Siginal Report Logging

Beacon Reception at PA5MW - HF beacon monitoring. Check world-wide propagation, updated every 15 minutes.

Ham map of Chile - CE Ham Map. Ham Radio regions in Chile

VHF Propagation Maps - Experimental maps that show real-time VHF propagation derived from analyzing data gathered from the APRS-IS network.

Analyzing UHF signals using FFT programs - With spectrum analysis of beacon signals, it's possible to see features relating to various propagation phenomonen.

Meteor scatter or meteor burst communications - A summary, overview or tutorial covering the basics of Meteor Scatter or Meteor Burst Communications, a form of radio signal propagation often used at VHF.

RF Skywave Propagation - Excellent presentation on RF skywave propagation by Greg, N6LYU

An introduction to HF Propagation - 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 by G4UCJ

WM5R Long Delayed Echoes - WM5R presentation of Introduction to Long-delaye echoes and theories among this propagation effect.

VOACAP Online - Online professional-grade high-frequency (3-30 MHz) propagation predictions

160 m Propagation Prediction - 160 Meter Radio Propagation Prediction Table

Radio Mobile - Usage guide - This website is dedicated to Radio Mobile. Radio Mobile is software by Roger Coudé VE2DBE. The program simulates RF propagation and is for free to the amateur radio community. All you want to know about Radio Mobile can be found here.

Propagation and the Atmosphere - overview of radio signals and radiowave propagation and how different areas of the atmosphere affect radio communications.

Ground Wave Signal Propagation - Article on propagation basics. The ground wave used for radio communications signal propagation on the long, and medium wave bands for local radio communications

Tropospheric propagation - Article about tropospheric propagation and the way in which radio signals at VHF and above propagate over greater distances than strictly line of sight in the troposphere

What the numbers mean in propagation - What the Numbers Mean, and Propagation Predictions--a brief introduction to propagation and the major factors affecting it.

A and K index in propagation - The understanding of the A and K indexes will become a very important issue when one begins serious HF operation.

Sporatic-E on 10 meters band - Understanding 10 Meter sporatic-e propagation by James R. Duffey

MicroMUF - MicroMUF is a windows free HF propagation calculator that you can use to estimate the MUF (Maximum Usable Frequency) and LUF (Lowest Usable Frequency) between any two points on the Earth.

iProp - iProp is a propagation simulator based on the 90's work of the FTZ Darmstadt