The KAT500 will enter a fine-tune mode if you re-initiate a tune cycle
right after the first one has finished. I don't know if the KAT3 will
do that, and I can't test it because mine always finds the primary match
the first time, but Elecraft would have a lot of incentive to reuse KAT3
algorithms and code in the KAT500. I believe the Elecraft tuners use
some variant of the steepest descent algorithm which can hang up on a
less than optimal solution
73,
Fred ["Skip"] K6DGW
Sparks NV DM09dn
Washoe County
Tom Boucher wrote on 12/7/2021 3:59 AM:
Thanks NK7Z, NK7I and K8CN for responses.
Dave and Rick indicated that running the K3 at a higher power level during
the ATU Tune sequence might solve the problem however, as far as I can see,
the power level is fixed at 5 watts during auto tune and cannot be altered.
Mike, there is no problem with the Ant 1 and Ant 2 ports and manual
selection of L & C works OK. The ATU just won't end up with the right
settings for lowest SWR. The problem has not always existed.
73,
Tom G3OLB
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