Can you remove multiple RFI sources at the same time with spatial filtering? Perhaps, but it’s not easy. Read more
Category: Radio
Digital Versus Analog SIFT
Which reduces wideband RFI better: digital versus analog SIFT. Take a look at my experiment and judge for yourself. Read more
Analog Noise Reducers on the Workbench
Before doing serious work with these four analog noise reducers, I thought I should get to know them properly with some lab tests. Read more
Worst Case Wideband RFI Reduction
All 4 of my test units attacked worst case wideband RFI successfully, but the performance of the cheap X-Phase really blew me away! Read more
RFI Cable Cleanup with TinySA
TinySA is a perfect tool for RFI cable cleanup. Make sure your supposedly shielded coaxial cables running between antennas and radio receivers are actually shielded.
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Analog Noise Reduction Showdown
Dreams come true. I have been able to assemble four leading analog noise reduction products for comparison, real world and lab testing. Read more
Wideband RFI Sniffer Very Useful
You can use your TinySA spectrum Analyzer as a close-in wideband RFI sniffer to check performance of how badly consumer electronics gear interferes with radio listening. Read more
X-Phase Performance on Shortwave
So, what’s the verdict on X-Phase performance for reducing RFI during shortwave listening? Pretty good, actually, for something so cheap and cheerful. Read more
Wiring My X-Phase RFI Fighter
Wiring my X-Phase QRM Eliminator kit was fairly easy, but here are a few things to keep in mind if you build one of these. Read more
Assembling My RA0SMS X-Phase QRM Eliminator
I finally got around to assembling my RA0SMS X-Phase QRM Eliminator kit which arrived from Russia last month. Here’s the story. Read more