With many people at home now might be a time to start on those projects you've always put off. Something good for the shack, especially if you live in an area with high noise, is an HF noise canceller. The idea is that you have a second deliberately poor antenna that picks up mainly noise. The signal is combined with the main antenna. Changing the phase relationship of arriving signals should allow a point where the noise can be nulled out.
Here's a few links to get you thinking.
https://www.vk5tm.com/homebrew/noisecancel/noisecancel.php
http://www.alg.myzen.co.uk/radio/136/noise_can.htm
http://ra3wdk.qrz.ru/NoiseCancel.htm
https://py2nl.blogspot.com/2017/08/relics-radio-communications-hf-band.html
Of course cancelling the noise is one step. It might be better, if you can, to remove it first. Here's some tips.
https://www.sotabeams.co.uk/blog/combating-hf-noise-what-works/
If you've built these projects or something like them please let us know in the comments below.
Now's a great time to be reading books. Especially with not much else to do.
No comments:
Post a Comment