A Dutch hamradio station in a bookbinding workshop

X-Phase noise cancelling

Today I finally ended building my X-Phase noise canceller. In the above picture the X-Phase was off. Below it's switched on and the three spikes are eliminated. (Enlarging the pictures gives a better view) It took about half a day of experiments to find out the right way to pick up the interfering signal (from my solar panels) on my aux-antenna.

How it works

The idea is to pick up local interference by means of an auxiliary antenna, change the phase of that signal by 180 degrees and feed that to the transceiver's antenna entrance. Thus eliminating the interference. As you can see: it works!


There is more to be found on this subject all over the internet. I'll provide some links in the next future... 

In Dutch there can be found info on