propagation cb/admin/adm

NVIS Antennas and Propagation - Understanding Amateur Radio NVIS Antennas and Propagation

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

Check DX Propagation with Beacons - W0RW article that guide you to using beacons to determine dead bands or upcoming propagation openings.

N2NXZ Beacon - 10 Meter Propagation Beacon. Amateur Radio and Wind turbine info

Megawave - MegaWave Corporation's goal is to provide services and products of the highest quality to its many customers in the areas of antenna design and development, and radiowave propagation.

Propagation Planning for DXpeditions - 6 Steps for a More Successful Trip by Carl Luetzelschwab K9LA

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.

WSPRnet Weak Signal Propagation Reporter Network - A group of amateur radio operators using K1JT's MEPT_JT digital mode to probe radio frequency propagation conditions using very low power transmissions. Computer sent/received Morse signals received by amateurs and collected on an online database.

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

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

Using the QST propagation charts - Notes on using the QST propagation charts to determine propagation conditions

Understanding propagation numbers - Quick reference table on understanding A K SFI indexes and how can be translated in usable frequency opportunities

Radiowave Propagation Center - High frequecy and VHF radio propagation data, solar and geomagnetic real-time and historic data, sunspot activity reports, as well as forecasts. A comprehensive propagation resource compiled by Tomas Hood, editor of the propagation columns of CQ, CQ VHF, Popular Communications, and Monitoring Times magazines.

Here Comes the Sun - Propagation and Sun - 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

Mid-Latitude Sporadic-E (Es) - This article was originally written in response to a brief review of the basics of sporadic-E

Sporadic E propagation - About Sporadic E propagation at wikipedia

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

Spotless days around solar cycle transition - An interesting perspective of the transition from one solar cycle to another is given by exploring the days with no reported sunspots.

Radio Works - RadioWORKS is a tool for calculating various items related to radio waves and radio wave propagation. Get detailed information about a frequency, such as the free-space wavelength, band classification, propagation methods, common transmitter configurations, etc. Calculate antenna lengths or frequencies. View a 3D coverage map by providing a latitude / longitude coordinate and transmitter height.

WSJT - WSJT facilitates basic digital communication using protocols like FSK441, JT6M, JT65,JT2, JT4, WSPR explicitly optimized for a number of different propagation modes by K1JT

W3DHJ - lunix utilities for Radio Amateurs - A small collection of bash scripts for pulling QTH info, grid square info, propagation charts, and monitoring prop logger postings.

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

WSPR - WSPR implements a protocol designed for probing potential propagation paths with low-power transmissions. Stations with internet access can automatically upload their reception reports to a central db

VOAProp - VOAProp shows you typical propagation for a given hour of the day during a given month. The propagation is shown as expected signal strengths to be received from different parts of the world, plotted on a world map. Windows freeware by G4ILO