KO7M - Ham Radio Blog

I have been playing around with the idea of generating PSK31 audio with an Arduino.  In a previous post a few years ago, I implemented a si...

I have been spending some time writing AVR Interrupt Service Routines of late and have decided to share some debugging techniques that I hav...

Due to a number of requests to share my VNA fixture design, I have made them available at OshPark.com using the following link .  Boards ca...

Still learning how to use the VNA.  Grabbed a handful of Crystals and clipping them to the VNA fixture described in my previous post , I col...

In a previous blog post  I mentioned purchasing a batch of 20 MHz crystals from China with the intent of building some crystal filters.  I a...

Fun with Arduinos and scopes in XY display mode...  Looks good on good old analogue and high end digital scopes.  Not so much on my $400 ...

My good friend Wayne NB6M has kindly loaned me his Minima-like build using my controller shield for the Arduino.  His front panel is very si...

I recently was given an Arduino Yun and have been playing around a little with this guy. It is quite a little improvement over the b...

I have implemented changes to the Minima controller code developed by Eldon Brown (WA0UWH) and others to use the second Si570 on my contr...

I have implemented support for rotary encoders in the Minima and provided integration of it into Eldon Brown's (WA0UWH) fine work on ...