Popular in ham radio circles, the process looks nicer than ... like the Wheatstone Bridge Regenerative Receiver you see above.

When I was a kid living near Grantsville, West Virginia, some of my neighbors were into amateur ham radio. I found their analog electronics and antennas and their mastery of Morse code fascinating.

There are two ways to deal with improving ham radio receivers, or — for that matter — any sort of receiver. You can filter and modify the radio frequency including the radio’s intermediate ...