Some designs here:
http://www.karinya.net/g3txq/chokes/
8 turns on a FT240-31 core is good for 20m thru 10m - it gives >2k Ohm
choking impedance across the range and is predominantly resistive.
Steve G3TXQ
On 12/04/2012 17:10, Tom Harke wrote:
> I am in the process of building a number of OWA's for 10,15 and 20 meters.
> I am looking for a recommendation for a good current balun.
>
> Thanks
>
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