[Elecraft] KAT500: Tuning on 6m

[Goldtr8 (KD8NNU)]

I have noticed since the last update of software I am getting more retuning 
also.

I had been running a test version prior to that and it did not exhibit the 
same retune as often.  In fact I did a tune or train check prior to the 
contest yesterday by going thru the bands and pressing tune to make sure 
everything was good so I could go and point and shoot.  However, the 
tripping of the retuning process was a distraction.

I do switch antennas a lot as I have 4 choices to pick.  I do understand 
that the KAT500 only has 3 inputs and am aware if I do the switch for the 
4th antenna.

If I were to describe the problem I think that something is getting lost in 
the memories.   Maybe if the Q of the antenna is narrow maybe the bins for 
memory are too broad?


~73
Don
KD8NNU
-.- -.. ---.. -. -. ..-
-----Original Message----- 
From: Don Wilhelm
Sent: Sunday, July 14, 2013 9:56 AM
To: KD7YZ Bob
Cc: 'K3 List'
Subject: Re: [Elecraft] KAT500: Tuning on 6m

Bob,

Did you QSY after tuning?  If so that would explain what is happening -
you may have moved out of the band segment that you used for the TUNE.
See the lower half of page 9 in the KAT500 manual.

You may want to 'train' your KAT500 on all segments of the 6 meter band.
If you have done that already, you may need to contact support.

73,
Don W3FPR

On 7/14/2013 7:43 AM, KD7YZ Bob wrote:
> Howdy K3' people:
>
> There is an 8-element yagi connected to the KAT500 for the K3 internal
> 6m selected 6m antenna.
>
> I set KAT500 default antenna for 6m to Ant2.
>
> On the KAT500 I can press 'TUNE' then tap K3 "XMIT" and the KAT500 will
> usually settle on or about 1.1:1 .
>
> Then when I .run a WSJT, Data, QSO, if the KAT500 is left in "AUTO",
> re-tuning will often take occupy 10 or more seconds of the time before
> the KAT500 finds a place it likes. Often the SWR is then in the RED or
> worse, FAULT. Not very often on FAULT however.
>
> Mostly what I see are SWR's around 2:1 .  (KAT500 in AUTO .
>
> If I put KAT500 in BYP,  the K3 often shows SWR's of 2 to 3.
>
> If left in AUTO, the mismatch is apparent in received audio.
>
> Without the KAT500, the antenna itself exhibits a 1.3 SWR consistently .
>
> The constant re-tuning or irregular attenuation due to mismatch form
> KAT500 is annoying. On a weak-signal QSOit means the difference from
> making the QSO or not decoding.

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