As we head into our fourth year, it’s time to look back and do a 2018 content review. What did I actually accomplish over the past 365 days? Read more
Author: John VE6EY
Collecting Stuff – A Hobby for Everyone
Collecting stuff is lots of fun. Recently, I noticed that my fireplace was being overrun by my wife’s Santa collection. Read more
Remembering Ham Radio Magazines
Ham radio magazines have been part of my life for fifty years. The best of them all was actually called “Ham Radio Magazine”. Remember it? Read more
Christmas Error – Guilty of Distracted Wrapping
I got distracted this week and created a Christmas error when I destroyed my iPod ear buds. Need to pay more attention to what I am doing. Read more
Loop Amplifier Input Impedance – Keeping It Low
Popular circuits do a pretty good job of providing low loop amplifier input impedance. This means you can use these to keep a loop in short-circuit wideband mode quite easily. Read more
Andonstar ADSM201 Digital Microscope – Merry Christmas
Merry Christmas, John. An Andonstar ADSM201 digital microscope for SMD work. And looking at tiny bugs with the grandchildren, too. Read more
Loop Current-to-Voltage Converter – A Short Story
A transimpedance amplifier provides a near perfect loop current-to-voltage converter. It provides lots of gain while keeping your loop in wideband or short-circuit mode, which is what you need. Read more
Dipole Versus Wideband Magnetic Loop Performance
Dipole versus wideband magnetic loop performance simulations show that a good active loop will stack up fairly well on the HF ham bands. Read more
Compare Wideband Loop Amplifier Performance
With LTSpice and a loop antenna model, you can easily compare wideband loop amplifier performance. Here is my evaluation of several popular circuits. Read more
LTSpice Magnetic Loop Model
You can experiment with wideband magnetic loop design with the LTSpice Magnetic Loop Model. Download here. Read more