[Elecraft] KX1 + Tuner + Norcal Doublet

[Burke Jones]

I constructed a Norcal Doublet using some speaker wire.  It seems to
tune up fine on 20 meters using the internal KX1 tuner - but on 40
meters I could not get the SWR under 4.

Would a 4:1 balun help with this?

Any links on how to build a simple balun using an aircore and not a torroid?

Thanks a bunch!

Burke Jones
N0HYD
Olathe, KS
http://www.n0hyd.com