[TowerTalk] Pattern Distortion caused by faulty balun?

Jim Brown jim at audiosystemsgroup.com
Fri Dec 30 13:20:25 PST 2011


On 12/30/2011 10:25 AM, Tony wrote:
> I'm told there
> are better baluns available and was wondering if you could recommend one
> that has greater isolation capabilities -- or at least one that's known
> to work well.

Sure. I've done a lot of research in that area, and published the 
results in

http://audiosystemsgroup.com/RFI-Ham.pdf

I don't recommend any commercial products because nothing I've tested is 
very good or even worth the cost, and because it's VERY easy to make 
your own VERY GOOD one by winding turns of coax through some ferrite 
cores. Specific recommendations are in the Choke Cookbook chapter of the 
above reference. Appendix One lists part numbers for the ferrite cores 
and some recommended places to buy them at reasonable prices.

73, Jim Brown K9YC


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