KAT3 question

[Rick Dettinger-3]

I have just installed the KAT3 and it seems to be working, however, i  
can only get a SWR of 4.0 on the K3 on my 40M end fed antenna.  I know  
the SWR with this antenna is very high, but I can get the SWR down to  
2.5 with my K2 ATU.  The K2 is using ALT tune to get there taking a  
long time.  I can understand that this could be a matter of chance,  
since the tuners use discrete components, rather than adjustable  
ones.  I don't find much info on the KAT3 in the Installation  
Instructions or the K3 Owner's Manual.  Sheet 3 of the KAT3  
Installation Manual, Introduction, says "Complete details for using  
the KAT3 are included in the KXV3 Owner's manual."  I can't find a  
KXV3 Owner's Manual on the Elecraft site, only the Installation  
Instructions and I don't have a KXV3.  Do I need a KXV3 to use my  
KAT3?  Does the KAT3 have the equivalent of ALT tune on the K2?  The  
KAT3 seems to give up after a few seconds, while the K2 tries real  
hard to get a good match.  I can prune my end fed antenna but I may be  
missing something here and would like to know.

Thanks and 73
Rick Dettinger
K7MW
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[KK7P]

Hello Rick!

The reference should be to the K3, not the KXV3.  Recent firmware
provides the "ALT" tune you are looking for.

Tap ATU TUNE a second time within 5 seconds on the same band/antenna and
a more extensive search algorithm will be used.

73,

Lyle KK7P

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[Ken Wagner K3IU]

Wayne published something a while back that if you push the "tune"
button very quickly after the first tuning stops, it will try again with
another algorithm that might result in a lower tuned SWR.  This from the
release notes for firmware 1.75.
" * ATU MATCHING Improved: If you tap ATU TUNE a second time on the same
    band/antenna within 5 seconds, a more extensive search is used that
may result in a
    lower SWR. The original (fast) algorithm is unchanged. Further
improvements are planned."

73, Ken K3IU
~~~~~~~~~~~~~~~~~~~~~~~~~~

Rick Dettinger wrote:

> I have just installed the KAT3 and it seems to be working, however, i
> can only get a SWR of 4.0 on the K3 on my 40M end fed antenna.  I know
> the SWR with this antenna is very high, but I can get the SWR down to
> 2.5 with my K2 ATU.  The K2 is using ALT tune to get there taking a
> long time.  I can understand that this could be a matter of chance,
> since the tuners use discrete components, rather than adjustable
> ones.  I don't find much info on the KAT3 in the Installation
> Instructions or the K3 Owner's Manual.  Sheet 3 of the KAT3
> Installation Manual, Introduction, says "Complete details for using
> the KAT3 are included in the KXV3 Owner's manual."  I can't find a
> KXV3 Owner's Manual on the Elecraft site, only the Installation
> Instructions and I don't have a KXV3.  Do I need a KXV3 to use my
> KAT3?  Does the KAT3 have the equivalent of ALT tune on the K2?  The
> KAT3 seems to give up after a few seconds, while the K2 tries real
> hard to get a good match.  I can prune my end fed antenna but I may be
> missing something here and would like to know.
>
> Thanks and 73
> Rick Dettinger
> K7MW
> _______________________________________________
> Elecraft mailing list
> Post to: [hidden email]
> You must be a subscriber to post to the list.
> Subscriber Info (Addr. Change, sub, unsub etc.):
> http://mailman.qth.net/mailman/listinfo/elecraft 
> Help: http://mailman.qth.net/subscribers.htm
> Elecraft web page: http://www.elecraft.com
>

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