With this NanoVNA Current Choke Test Rig, you can quickly design and test all sorts of common mode chokes in your home lab. Read more
Tag: RFI
Building and Using Common Mode Chokes
Designing and testing ferrite core common mode chokes can be a challenge. You have lots of things to consider. Read more
Arduino Sleep Modes and RFI
Several folks suggested that I try putting my Arduino to sleep in an effort to reduce RFI with my relay controlled antenna switch. So, here are some experiments with Arduino sleep modes. Read more
My Testing Projects – Making It Up 2021 Review
My testing projects were fun, and consumed much of my time during 2021. Our main focus was on RFI and antennas. Read more
Power System Interference Spectrum
Take time out to understand the source and complexity of power system interference spectrum. My video explains where a lot of RFI comes from around your house. Read more
Sound Card Oscilloscope for SDR
You can use a sound card oscilloscope for many things. My favorite use is to study noise and interference signatures on the shortwave radio spectrum. Read more
My Collection of RFI Fighting Videos
If a picture is worth a thousand words, you might find my RFI fighting videos useful. When you can actually see spatial filtering work, you get motivated. Read more
Radio Accessory Power Distribution Box
Another successful 3D printed gadget for the radio room. This time, I built an accessory power distribution box for a couple of dollars. Read more
Removing Switched Mode Power Supplies from Shack
Removing switched mode power supplies, and their attendant RFI, can be quite simple. Let’s take a look at my cheep and cheerful approach. Read more
All Good Things – QRM Eliminator Wrap-up
If you set up noise antennas properly, any of these devices can work for you. That’s the essence of my QRM Eliminator Wrap-up. Read more