[Elecraft] KAT500 TUNER WOES

[Nr4c]

Have you tried a dummy load with tuner on 40m?

Have you used an analyzer on the antenna?



Sent from my iPhone
...nr4c. bill


> On May 19, 2014, at 9:26 PM, "David Inger" <ingerassociates at cox.net> wrote:
> 
> I have a fairly early KAT500 tuner  (#275).  I am using it to tune several
> antennas.  Recently it has stopped finding acceptable matches to a
> ladderline-fed 110 ft. dipole.   This problem is only on 40-meters.  The SWR
> anywhere in that band is around 8:1.  The tuner works great on all other
> bands (well, not so much on 160, but that's the antenna's problem).  I also
> have a 43-ft vertical and the tuner matches fine on that antenna.  I
> replaced all intervening coax jumpers and even the 1:1 current balun at the
> transition of the ladderline to the coax in the shack.  None of the above
> help.
> 
> 
> 
> Interestingly, when I bypass the KAT500 and enable the internal tuner in the
> K3, everything works fine, including matching 40-meters.  I have also done a
> reset using the KAT500 utility program; still no help.
> 
> 
> 
> Before, I tear into things or stop bothering the good people at Elecraft, I
> wonder if any in the group has any suggestions.
> 
> 
> 
> 73 de K6SBA
> 
> David in Santa Barbara, CA
> 
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