website design software

Name That Core

Day-to-Day Variability of the Ionosphere

Is the Ionosphere In Step

NM7M The Little Pistol's Guide to HF Propagation     This is a 15 Megabyte file. A special thanks to NM7Mís daughters and son for giving me permission to put this (and Bobís other books) on my web site.

NM7M Long Path Propagation     This is a 3 Megabyte file.

NM7M Long Path Propagation - Revisited     This is a 19 Megabyte file.

NM7M On Ion Chemistry and Propagation

Where Do the K and A Indices Come From


The Formation of the Ionosphere


Disturbances to Propagation

A Look Inside the Auroral Zone

Propagation Plannning for DXpeditions

Measuring the Ionosphere

NM7M Contributions to Propagation

Did We Lose a Solar Cycle

Old Sunspot Data


[home] [Monthly Feature] [Timely Topics] [Basic Concepts] [Tutorials] [General] [160m] [HF] [VHF] [Contesting] [My Novice Days] [Aviation] [RF Power Amps] [Antennas] [Rcv Antennas]