Resources

​QRZ.com

​NOAA Near Real-Time Graph of the Maximum Usable Frequency (MUF)

Amateur Radio Relay League (ARRL)

All About Lightning Protection from DXZONE.com
 
Beginners Guide to FLDIGI from W1HKJ
 
HF Propagation Tools & Solar Data from Paul Herrman

 ​Call Sign Prefixes & Locations from W5YI

Emergency Communications 3-3-3 Plan 

More on Electrical Formulas from Electronics Tutorials​