If you use a wideband loop antenna, a cheap Distill AM Bandstop Filter reduces SDR overload from local medium wave signals. Read more
Category: Radio
Discover LOFAR – Low Frequency Universe
Discover LOFAR and learn about how to search the universe for signals using digital beamforming with simple antennas and computers. Read more
Year in Review 2020 Diversity Reception
I have been playing with dual channel SDR for a few years. But in 2020 diversity reception took a major leap forwards with RSPduo and phased array. Read more
Year in Review 2020 Active Loop Antennas
During 2020 active loop antennas were my primary focus. Everything turned out pretty well with great performing wideband results. Read more
Universal Radio Tribute – A Long Run
Here’s to Universal Radio for its exceptional service to ham and shortwave radio enthusiasts around the world for thirty-seven years. Read more
How It’s Made – SDRplay
Inquiring minds wonder how it’s made. You can learn a lot on You Tube, including the story of SDRplay hardware and software. Take a look. Read more
Antenna Modeling Software
If you have a moderate understanding of antennas, you can use antenna modeling software to better understand how your antenna creations work. Read more
Endfire Loop Array Patterns on Medium Wave
My small changes to phasing creates remarkably different endfire loop array patterns. I can demonstrate these with empirical results and analytical modeling. Read more
Loop Array Pattern Calculations
Using an Excel spreadsheet, I have created an easy way to visualize my loop array pattern as I change frequency and phasing in the dual channel SDR. Read more
Antenna Fun with Array Delay
Beamforming, or signal phasing with multiple antennas, means understanding array delay through the complete system. Here’s how it works. Read more