[TowerTalk] Common Mode Interference

[Bob K6UJ]

I am still learning how to deal with common mode interference, and I am 
still
very much a work in progress  :-)
Below are two sites with info on this subject that some of you may not 
be aware of.

First of all, Jim, K9YC has an invaluable treatise on this.  I am using 
his "cookbook recipes"  :-)  for chokes
on all my HF beams.  This should be required reading for anyone dealing 
with RFI,
and common mode noise.
Here is a link:   http://audiosystemsgroup.com/RFI-Ham.pdf

Also, take a look at the extensive common mode noise mitigation work 
done by N4IS.
His work illuminates what Jim talks about.  (Very interesting, he has 
done quite a bit of work.)
Here is a link,  slide way down and look at all the common mode work he 
has done :
http://wwrof.org/wp-content/uploads/2016/03/WWROF-WEBNAIR-RX-Antennas-for-a-Small-Lot-.pdf

73,
Bob
K6UJ