My next project is to build a magnetic loop antenna.
My objective is to build a butterfly capacitor for a magnetic loop antenna.
Here is my first attempt to hold thin aluminum in place so I could mill plates for my butterfly capacitor.
My first attempt to cut thin aluminum almost worked. But not quite.
Back to my loop antenna project. Nearly there with milling capacitor plates.
Painters tape hold down works with thin aluminum. Here’s how.
Hooray! My first butterfly capacitor is assembled.
My prototype motor tuned capacitor has been assembled.
Here is my Mostly Printed Butterfly Capacitor, ready for use in a magnetic loop antenna.
Here is my DIY butterfly capacitor motor drive design.
Here is a narrated video of the motorized butterfly capacitor in action.
Now that I have a butterfly capacitor working, it’s time to select my magnetic loop material.
This copper loop jig should help me create a perfect circle for my magnetic loop antenna.
Time has come to make some magnetic loop mounts.
A magnetic loop feed point is the method you use to apply radio power to the antenna.
Magnetic loop measurement – the proof of the pudding is in the eating.
My first 30 meter antenna is up and running.
It’s been a busy few days, but I did manage to get the serial loop control running.
ESP8266-01 is the name of a great little WiFi module for remote control or sensing.
Making a loop controller PCB is pretty straightforward.
Ham radio makers are doing well and having fun.