[Elecraft] K3 Auto ATU Problem

[CUTTER DAVID]

Sounds like you are in need of a choke somewhere or a grounding issue. 

David G3UNA

> On 07 December 2021 at 13:26 Tom Boucher <tomg3olb at gmail.com> wrote:
> 
>     Tom
> 
>     I've found that pressing tune again, immediately after a tune sequence sets it off to do "fine tuning" which might help.
> 
>     David G3UNA
> 
>     Thanks David - yes I've tried that, but it still ends up with a poor indicated SWR. Also cleaned up and tightened the screwed pillar in the KAT3 corner, tightened up the 3 LPA screws underneath. It's very strange!
> 
>     73,
>     Tom G3OLB
> 
>     On Tue, 7 Dec 2021 at 12:21, CUTTER DAVID < d.cutter at ntlworld.com mailto:d.cutter at ntlworld.com > wrote:
> 
>         > > Tom
> > 
> >         I've found that pressing tune again, immediately after a tune sequence sets it off to do "fine tuning" which might help.
> > 
> >         David G3UNA
> > 
> >         > On 07 December 2021 at 11:59 Tom Boucher < tomg3olb at gmail.com mailto:tomg3olb at gmail.com > wrote:
> >         >
> >         >
> >         > 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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> >     >