I was able to use a PCF8547 GPIO Expander Board to reduce but not eliminate RFI from my Arduino. Here’s how that works. Read more
Using Loop Array with a Single Channel Receiver
So how do you use a wideband loop array with a single channel receiver? With a receive antenna phasing controller, of course. Read more
Tracking Down Antenna Switch RFI Ingress
Well, it’s settled. I have a major antenna switch RFI ingress problem. As much as 30 dB on some frequencies. Sigh. Read more
Antenna Switch Port Isolation Considered
My homebrew antenna switch port isolation is decent, but not great. But too much RFI is being fed though the outputs. Read more
SDR Antenna Switch Up and Running
My remote control SDR antenna switch is up and running. Now, I can switch SDR and antennas by remote control. Read more
Active Antenna Amplifier Relay Control
Wideband loop amplifiers are easily automated with active antenna amplifier relay control, all for a few dollars. Read more
Dual Channel Antenna Switch with Relays
My homebrew dual channel antenna switch is up and running. It let’s be switch pairs of antennas to a bunch of two channel diversity receivers. Read more
Homebrew Radio Switching Board
I am moving a large part of my shack to a wall mounted radio switching board. My goal is complete remote relay switching of antennas for my diversity receivers and loop array. Read more
Modern Diversity Reception at BayCon 2022
Earlier this month, I made a detailed presentation about Modern Diversity Reception at BayCon 2020, an online ham conference. Watch the video! Read more
Accumulate 3D Printing Experience – User Perspective
Here are some more comments from Matt, WX1A on his journey to accumulate 3D printing experience. You can learn a lot from him. Read more