[TowerTalk] Common mode choke

Dan Atchison N3ND at aol.com
Thu Nov 7 11:14:09 EST 2013

With my second floor shack, I have common mode RF issues that have been 
well mitigated with common mode chokes of 5 FT240-43 cores, but at 40 
and below frequencies the choking could be improved.  I ordered several 
FT240-31 mix cores and was going to replace the 43 mix, but thought I 
might have good luck if I just added the 31 mix with the 43 mix, i.e. 10 
ferrite cores in a choke as opposed to five.  Are there any 
disadvantages to this or perhaps is it overkill?

Dan -- N3ND

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