[Elecraft] KXPA-100 tuner question.

Dick Dievendorff dick at elecraft.com
Sat Nov 21 07:45:50 EST 2020


Bob: the KXPA100 Utility operate page should have check boxes for manual selection of L and C. There is also an edit box with up and down arrows to change L and C one step at a time. See if you can wiggle those to a place that better suits you.  There is a save button once you’ve reached Nirvana. 

It may not be possible to get to 1:1.00 on every freq with fixed sized inductors and capacitors. 

Not all of the L and C are useful on any particular band.  The largest are not used on 6 meters, the smallest don’t make much difference on 160 meters.

You’ll hear this from others, but a minor mismatch isn’t going to make much difference at the other end of the QSO.  But I, too, try to minimize this...

73 de Dick, K6KR

> On Nov 20, 2020, at 17:58, Bob N3MNT <bob at hogbytes.com> wrote:
> 
> I recently replaced/ upgraded the coax and balun on my Off center dipole and
> no longer have to ability to get a 1:1 match using the tuner.  I know it is
> OCD (no pun intended)  but I have always been able to get 1:1 with the
> tuner.  
> Details:  
> Operating on low end of 80M  3.563M
> Measuring the antenna / coax at shack shows 1:1.7 on swr meter ( actual
> several).
> KXPA-100 tuner will tune to 1:1.3 at best.
> Values used by tuner C = 300  L= 0.
> I assume this is due to the tuning steps ( granularity) and I know I should
> not be concerned but would like to resolve it.  Any suggestions on fooling
> the tuner to move to a better LC selection.  
> 
> 
> 
> 
> --
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