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GCLM Chapters GCLM Homepage Introduction Procedures and Practices Rules and Regulations Components and Circuits Radio Signals and Equipment Antennas Propagation Electrical and RF Safety   ARRL Products: Technical, Electronics, and Communications Reference (More) Basic Antennas -- An introduction to antennas--basic concepts, practical designs, and easy-to-build antennas! The ARRL Antenna Book -- The ultimate reference for Amateur Radio antennas, transmission lines and propagation. Fully-searchable CD-ROM included. 21st edition. Electromagnetic Compatibility Engineering -- Now Shipping! -- The most comprehensive book on electromagnetic compatibility, including all the latest advances and developments in the field. MFJ 20-meter CW Cub Transceiver Kit -- Now Shipping! -- Enjoy countless hours operating this tiny high performance QRP Transceiver. The ARRL Handbook for Radio Communications -- Now Shipping! -- THE standard in applied electronics and communications -- The BIGGEST Handbook EVER!

Chapter 7 – Propagation

Once a signal is traveling between antennas, how does it get from Point A to Point B? What makes bands open and close? How do the solar cycle and the seasons affect propagation? Section 7 introduces you to the exciting world of HF propagation.

Propagation

• Propagation - several introductory and basic propagation articles
• RSGB Propagation - thorough list of resources from the Radio Society of Great Britain
• AC6V Propagation Resource List - compilation of propagation links and resources
• Propagation Prediction Software - software package list on the AC6V Web site

Beacon Stations

• NCDXF Beacons - the Northern California DX Foundation maintains a world-wide system of beacons for hams to use for checking HF propagation
• Directories of Beacon Stations

Solar Activity and Geophysical Information

• Spaceweather - what’s going on around the Earth
• HF Radio - real-time information and predictions