[Elecraft] Balun Questions

[Dave Cole]

Thank you Bob...
-- 
73's, and thanks,
Dave

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On Tue, 2016-02-09 at 14:28 -0600, Bob McGraw K4TAX wrote:
> Yes, insulation does in effect cause the electrical length to change.
> 
> Case and point, construct a 1/2 wave antenna using insulated wire,
> put 
> it up and determine the resonant frequency or point where the SWR is 
> 1:1.   Then take it down, carefully strip off the insulation and put
> it 
> back in the same place.  Make the same measurements to determine 
> resonant frequency or point where the SWR is 1:1.  You'll find it 
> changed due to the K factor contributed by the insulation.
> 
> 73
> Bob, K4TAX
> 
> 
> 
> On 2/9/2016 1:46 PM, Dave Cole wrote:
> > Hi Jim,
> > 
> > I have been reading about your exploits with THHN, and the 100 to
> > 50
> > ohm change caused by the insulation...
> > 
> > I am going to pick some up today and wind a choke using it, (as
> > opposed
> > to enameled 14 GA copper), to see just how close to 50 ohms it will
> > come...  Any last minute tips?
> > 
> > BTW, thanks again for publishing all of your work!
> > 
> 
> 
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