KAT500 memories

[Elecraft mailing list]

I understand the tuner holds tune data in memories for quicker tuning when changing frequencies, and it stores separate data for each antenna port. My question is, how many data points can these memories hold? In other words, how many frequencies per band per antenna can it hold?

Harlan
K4HES

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[k6mrmagnet]

Page 15 of the owner’s manual has a table of the segment width vs. frequency.  So in answer to your question: “It depends”



Ken K6MR



________________________________
From: [hidden email] <[hidden email]> on behalf of Harlan Sherriff via Elecraft <[hidden email]>
Sent: Tuesday, April 24, 2018 12:07:23 PM
To: Elecraft Email
Subject: [Elecraft] KAT500 memories

I understand the tuner holds tune data in memories for quicker tuning when changing frequencies, and it stores separate data for each antenna port. My question is, how many data points can these memories hold? In other words, how many frequencies per band per antenna can it hold?

Harlan
K4HES

Sent from my iPhone
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[Don Wilhelm]

Harlan,

There are enough to store data for each band segment in the 160m thru 6m
bands.  Page 15 of the KAT500 manual shows the width of each band segments:
 Below 3 MHz the segments are 10 kHz wide.
 From 3 MHz through 26 MHz the segments are 20 kHz wide.
 From 26 MHz to 38 MHz the segments are 100 kHz wide.
 From 38 MHz to 60 MHz the segments are 200 kHz wide.

You are not likely to run out of memories.

73,
Don W3FPR

On 4/24/2018 3:07 PM, Harlan Sherriff via Elecraft wrote:
> I understand the tuner holds tune data in memories for quicker tuning when changing frequencies, and it stores separate data for each antenna port. My question is, how many data points can these memories hold? In other words, how many frequencies per band per antenna can it hold?
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[Brian D]

Are the segments on fixed frequencies? I like to work through the bands I
use before contests to set up tuning. Sometimes in the following contest I
find a frequency which seems to be between segments, retuning within 10KHz
either side doesn't then seem to correct the tuning on the specific
frequency I want to use.


Don Wilhelm <[hidden email]> wrote:

> Harlan,
>
> There are enough to store data for each band segment in the 160m thru 6m
> bands.  Page 15 of the KAT500 manual shows the width of each band
> segments:  Below 3 MHz the segments are 10 kHz wide.  From 3 MHz through
> 26 MHz the segments are 20 kHz wide.  From 26 MHz to 38 MHz the segments
> are 100 kHz wide.  From 38 MHz to 60 MHz the segments are 200 kHz wide.
>
> You are not likely to run out of memories.
>
> 73, Don W3FPR
>
> On 4/24/2018 3:07 PM, Harlan Sherriff via Elecraft wrote:
> > I understand the tuner holds tune data in memories for quicker tuning
> > when changing frequencies, and it stores separate data for each antenna
> > port. My question is, how many data points can these memories hold? In
> > other words, how many frequencies per band per antenna can it hold?
> ______________________________________________________________ Elecraft
> mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help:
> http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net Please help support this email
> list: http://www.qsl.net/donate.html Message delivered to
> [hidden email]
>

--
Brian D
G3VGZ  Yarm    England
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[Elecraft mailing list]

Thanks all. I did notice the chart in the manual but wasn’t sure if the memory could hold all of that for all bands/antenna. I’m working on a program to automate this process (with manual transmit so as not to disturb ongoing QSO’s), and didn’t want to set up more than the memory would allow.

Sent from my iPhone

> On Apr 24, 2018, at 3:55 PM, Brian D <[hidden email]> wrote:
>
> Are the segments on fixed frequencies? I like to work through the bands I
> use before contests to set up tuning. Sometimes in the following contest I
> find a frequency which seems to be between segments, retuning within 10KHz
> either side doesn't then seem to correct the tuning on the specific
> frequency I want to use.
>
>
> Don Wilhelm <[hidden email]> wrote:
>
>> Harlan,
>>
>> There are enough to store data for each band segment in the 160m thru 6m
>> bands.  Page 15 of the KAT500 manual shows the width of each band
>> segments:  Below 3 MHz the segments are 10 kHz wide.  From 3 MHz through
>> 26 MHz the segments are 20 kHz wide.  From 26 MHz to 38 MHz the segments
>> are 100 kHz wide.  From 38 MHz to 60 MHz the segments are 200 kHz wide.
>>
>> You are not likely to run out of memories.
>>
>> 73, Don W3FPR
>>
>>> On 4/24/2018 3:07 PM, Harlan Sherriff via Elecraft wrote:
>>> I understand the tuner holds tune data in memories for quicker tuning
>>> when changing frequencies, and it stores separate data for each antenna
>>> port. My question is, how many data points can these memories hold? In
>>> other words, how many frequencies per band per antenna can it hold?
>> ______________________________________________________________ Elecraft
>> mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help:
>> http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email]
>>
>> This list hosted by: http://www.qsl.net Please help support this email
>> list: http://www.qsl.net/donate.html Message delivered to
>> [hidden email]
>>
>
>
> --
> Brian D
> G3VGZ  Yarm    England
> ______________________________________________________________
> Elecraft mailing list
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>
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> Please help support this email list: http://www.qsl.net/donate.html
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[Don Wilhelm]

Brian,

If you have not 'trained' the tuner on each band segment, the KAT500
will use the settings from the closest band segment where data is available.

After 'training' the tuner, do you switch the tuner to MANual?  If not
you should.  If left in AUTO, there will be times when the tuner will
try to tune even though it had already been tuned on that band segment.
That behavior is due to the fact that the forward and reverse power
cannot be measured at exactly the same time.

On SSB for instance, if the forward power is sensed at a time when the
audio is low, and then the audio increases when the reverse power is
measured. the SWR calculation will say (incorrectly) there is a high SWR
and the tuner will attempt to tune.
Leaving the KAT500 in MAN mode prevents that behavior.

Remember that an SWR of 1 is not essential.  An SWR of 1.2 or 1.3 is
quite acceptable and will keep the KPA500 quite "happy".

73,
Don W3FPR

On 4/24/2018 3:55 PM, Brian D wrote:
> Are the segments on fixed frequencies? I like to work through the bands I
> use before contests to set up tuning. Sometimes in the following contest I
> find a frequency which seems to be between segments, retuning within 10KHz
> either side doesn't then seem to correct the tuning on the specific
> frequency I want to use.
>
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