The balun should be a current balun. And it should use two separate cores
to obtain the highest common-mode impedance.
On Jun 29, 2012 2:13 AM, "George Warnock" <email@example.com>
> Hello I have had for sometime a cushcraft x9 triband beam (big thunder)
> the antenna is complete with the exception of the feed system, which is all
> missing...I have the measurements for the feed straps and insulators which
> I can manufacture myself, but need some advice about the balun...its a 4-1
> balun but need to know which type current ect.....or maybe someone out
> there has ideas about a different approach to feeding this antenna other
> than the cushcraft method...
> yours george gi0vgl
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