Although most hams joined the forces, several thousand stayed home doing civilian intercept. In Britain they were volunteers. In the U.S. they worked for the FCC. Read more
Tag: SWL
WW2 Military Wireless Intercept Facilities
During World War 2, military wireless intercept facilities were everywhere. Long-range monitored theaters of operation. Short-range units dug in with the troops. Read more
WW2 Military Wireless Intercept Organization
Military wireless intercept organization is a massive, complex system. The Allies simply did a better job of getting all the parts to work together. Read more
WW2 Solar Cycle 17 – HF Propagation
Signals corps and radio engineers learned a lot about radio propagation during WW2 solar cycle 17 – much of it the hard way. Read more
WW2 Signals Spectrum – A Quick Survey
You would have enjoyed being a shortwave listener during the war. WW2 signals spectrum was absolutely hopping over its full range. Read more
World War 2 Wireless Intercept – Reading the Mail
World War 2 Wireless Intercept is the story of the people and technologies that fought our first electronic war, and took signals intelligence to a whole new level. Read more
Understanding Extraordinary Wave Propagation
Once and for all, let’s understand extraordinary wave propagation on HF. Why does it happen and what does it mean to us? Read more
Our Magnetic Field Effects Skywaves
Recently, I wrote about how our magnetic field effects skywaves polarization, turning everything elliptical. Let’s dig deeper. Read more
HF Skywave Polarization – Not What You Think
All shortwave signals arriving at your receiver have elliptical polarization. HF skywave polarization is simply not what you think it is. Read more
Radio Propagation Basics in 2022
I spent some time writing about radio propagation basics in 2022. Unlike electronic circuits, sending signals through the ionosphere is really complex. Read more