Re: [Elecraft] KAT500 with KX3

[tomb18]

HiWin4K3Suite supports this without hardware. 73 Tom


Sent from my Samsung Galaxy smartphone. Original message From: 
Jim Brown <j...@audiosystemsgroup.com> Date: 2016-05-20  3:56 PM  (GMT-05:00) 
To: elecraft@mailman.qth.net Subject: Re: [Elecraft] KAT500 with KX3 
This looks like a nice pieces of software, but it is only needed if 
you're feeding the KAT500 less than 10-20W (that is, KX3 barefoot). The 
KAT500 senses operating frequency from RF, but it needs about that level 
to do so.

Another good reason for using this band decoder is to automatically 
switch antennas or bandpass filters.

73, Jim K9YC

On Fri,5/20/2016 11:28 AM, ke9uw wrote:
> You need the Paula Keezer KX3 band decoder. Makes the KX3 look like a K3 for
> the purpose.
>
> http://www.nx1p.net/what-is-a-kx3-band-decoder/

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Re: [Elecraft] KAT500 with KX3

[Jim Brown]

This looks like a nice pieces of software, but it is only needed if 
you're feeding the KAT500 less than 10-20W (that is, KX3 barefoot). The 
KAT500 senses operating frequency from RF, but it needs about that level 
to do so.


Another good reason for using this band decoder is to automatically 
switch antennas or bandpass filters.


73, Jim K9YC

On Fri,5/20/2016 11:28 AM, ke9uw wrote:

You need the Paula Keezer KX3 band decoder. Makes the KX3 look like a K3 for
the purpose.

http://www.nx1p.net/what-is-a-kx3-band-decoder/


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Re: [Elecraft] KAT500 with KX3

[ke9uw]

You need the Paula Keezer KX3 band decoder. Makes the KX3 look like a K3 for
the purpose.

http://www.nx1p.net/what-is-a-kx3-band-decoder/



-
Chuck, KE9UW
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Re: [Elecraft] KAT500 with KX3

[Michael Blake]

Yes Bill, I believe that is correct but I want it to band follow so that the 
solution will be set to the last correct solution for the current frequency 
when only receiving.  It follows the K3/KPA500  and the the question is “how do 
I implement this with the KX3?

Michael Blake







> On May 19, 2016, at 12:24 PM, Nr4c  wrote:
> 
> I believe it will sense RF on a dit or two. So only the coax is required.  
> 
> Sent from my iPhone
> ...nr4c. bill
> 
> 
>> On May 19, 2016, at 11:06 AM, Michael Blake  wrote:
>> 
>> Which data connection(s) do I use to control the band/frequency settings on 
>> the KAT500 when the transceiver is a KX3?  The amplifier is a low drive 
>> modified ALS-600 which seems like a straight forward keying connection but I 
>> am not sure about the data connection from the KX3’s E980232 "Cable Adapter 
>> 6” RCA & 3.5mm”.
>> 
>> Stated differently which interconnecting cables do I need to order to cause 
>> the KAT500 to frequency track the KX3?
>> 
>> Michael Blake
>> 
>> 
>> 
>> 
>> 
>> 
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Re: [Elecraft] KAT500 with KX3

[Nr4c]

I believe it will sense RF on a dit or two. So only the coax is required.  

Sent from my iPhone
...nr4c. bill


> On May 19, 2016, at 11:06 AM, Michael Blake  wrote:
> 
> Which data connection(s) do I use to control the band/frequency settings on 
> the KAT500 when the transceiver is a KX3?  The amplifier is a low drive 
> modified ALS-600 which seems like a straight forward keying connection but I 
> am not sure about the data connection from the KX3’s E980232 "Cable Adapter 
> 6” RCA & 3.5mm”.
> 
> Stated differently which interconnecting cables do I need to order to cause 
> the KAT500 to frequency track the KX3?
> 
> Michael Blake
> k9...@mac.com 
> 
> 
> 
> 
> 
> 
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[Elecraft] KAT500 with KX3

[Michael Blake]

Which data connection(s) do I use to control the band/frequency settings on the 
KAT500 when the transceiver is a KX3?  The amplifier is a low drive modified 
ALS-600 which seems like a straight forward keying connection but I am not sure 
about the data connection from the KX3’s E980232 "Cable Adapter 6” RCA & 3.5mm”.

Stated differently which interconnecting cables do I need to order to cause the 
KAT500 to frequency track the KX3?

Michael Blake
k9...@mac.com 






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Re: [Elecraft] KAT500 Serial Cable

[Don Wilhelm]

Mike,

You can order one from Elecraft.
Order the KXSERa (3.5mm to DB9-F): Extra Cable 3.5mm to RS232 DB9-F for 
KX3.

It can be found in the KX3 or the KPA500 order listings.

73,
Don W3FPR

On 5/10/2016 6:26 PM, Mike VE3YF wrote:

Hi:

Does anyone happen to have a Serial Cable for the KAT500 Tuner that they are 
not using and willing to sell to me. I have a USB Cable, but at the moment a 
serial cable would work better for me. Tnx.




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[Elecraft] KAT500 Serial Cable

[Mike VE3YF]

Hi:

Does anyone happen to have a Serial Cable for the KAT500 Tuner that they are 
not using and willing to sell to me. I have a USB Cable, but at the moment a 
serial cable would work better for me. Tnx.


73 De Mike
VE3YF

http://www.ve3yf.com
[http://www.ve3yf.com/]
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[Elecraft] KAT500 Problem Status

[Ed G]

Thanks to Dick K6KR for helping me with this problem yesterday. Updating the
KAT500 utility program, in combination with a KAT500 firmware reload, fixed
the issue. 
--Ed--



Message: 7
Date: Sun, 6 Mar 2016 08:08:11 -0500
From: "Ed G" <ed.n...@gmail.com>
To: <elecraft@mailman.qth.net>
Subject: [Elecraft] KAT500 Utility Question
Message-ID: <F5CAB1C1B7CC4181BDE365D70E637DD4@SHACKXPS>
Content-Type: text/plain;   charset="us-ascii"

Hello,
 I am trying to understand the operation of the KAT500 utility.  Not
sure if my problem is pilot error or maybe a problem within the tuner
itself.  I have the latest firmware installed.
 I am unable to manually select the antenna using the utility. I cannot
physically check the tuner as it is in a remote location. Each time I select
an antenna other than ANT1 using the radio buttons, the selection reverts
back to ANT1. This happens whether in Bypass, Manual, or Auto modes.  I have
verified the antenna setup per band. In my case I want to use ANT2 for 80
meters, and have set this up in the antenna tab. I have even disabled ANT1
for 80 meters, but the utility still won't let me select ANT2 for 80 meters.
The KAT500 also does not automatically switch when RF is applied, even
though the utility will read the correct 3.5 MHz frequency.
 Any ides for what to check?
--Ed--






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Re: [Elecraft] KAT500 Utility Question

[Scott Manthe]

You're absolutely right, Wes. It's obvious my problem was pilot error. 
The danger of doing too many things at once...


Scott N9AA


On 3/6/16 8:02 PM, Wes (N7WS) wrote:

Did you not read the post?  He's talking about a KAT500, not a KAT3.

On 3/6/2016 10:31 AM, Scott Manthe wrote:
I think you have to have the KAT3 tuner physically installed in the 
radio to be able to select ANT 2 on the radio or in the utility.


73,
Scott N9AA


On 3/6/16 8:08 AM, Ed G wrote:

Hello,
  I am trying to understand the operation of the KAT500 
utility.  Not

sure if my problem is pilot error or maybe a problem within the tuner
itself.  I have the latest firmware installed.
  I am unable to manually select the antenna using the utility. 
I cannot
physically check the tuner as it is in a remote location. Each time 
I select
an antenna other than ANT1 using the radio buttons, the selection 
reverts
back to ANT1. This happens whether in Bypass, Manual, or Auto 
modes.  I have
verified the antenna setup per band. In my case I want to use ANT2 
for 80
meters, and have set this up in the antenna tab. I have even 
disabled ANT1
for 80 meters, but the utility still won't let me select ANT2 for 80 
meters.

The KAT500 also does not automatically switch when RF is applied, even
though the utility will read the correct 3.5 MHz frequency.
  Any ides for what to check?
--Ed--


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Re: [Elecraft] KAT500 Utility Question

[Wes (N7WS)]

Did you not read the post?  He's talking about a KAT500, not a KAT3.

On 3/6/2016 10:31 AM, Scott Manthe wrote:
I think you have to have the KAT3 tuner physically installed in the radio to 
be able to select ANT 2 on the radio or in the utility.


73,
Scott N9AA


On 3/6/16 8:08 AM, Ed G wrote:

Hello,
  I am trying to understand the operation of the KAT500 utility.  Not
sure if my problem is pilot error or maybe a problem within the tuner
itself.  I have the latest firmware installed.
  I am unable to manually select the antenna using the utility. I cannot
physically check the tuner as it is in a remote location. Each time I select
an antenna other than ANT1 using the radio buttons, the selection reverts
back to ANT1. This happens whether in Bypass, Manual, or Auto modes.  I have
verified the antenna setup per band. In my case I want to use ANT2 for 80
meters, and have set this up in the antenna tab. I have even disabled ANT1
for 80 meters, but the utility still won't let me select ANT2 for 80 meters.
The KAT500 also does not automatically switch when RF is applied, even
though the utility will read the correct 3.5 MHz frequency.
  Any ides for what to check?
--Ed--


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Re: [Elecraft] KAT500 Utility Question

[Scott Manthe]

I think you have to have the KAT3 tuner physically installed in the 
radio to be able to select ANT 2 on the radio or in the utility.


73,
Scott N9AA


On 3/6/16 8:08 AM, Ed G wrote:

Hello,
  I am trying to understand the operation of the KAT500 utility.  Not
sure if my problem is pilot error or maybe a problem within the tuner
itself.  I have the latest firmware installed.
  I am unable to manually select the antenna using the utility. I cannot
physically check the tuner as it is in a remote location. Each time I select
an antenna other than ANT1 using the radio buttons, the selection reverts
back to ANT1. This happens whether in Bypass, Manual, or Auto modes.  I have
verified the antenna setup per band. In my case I want to use ANT2 for 80
meters, and have set this up in the antenna tab. I have even disabled ANT1
for 80 meters, but the utility still won't let me select ANT2 for 80 meters.
The KAT500 also does not automatically switch when RF is applied, even
though the utility will read the correct 3.5 MHz frequency.
  Any ides for what to check?
--Ed--



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[Elecraft] KAT500 Utility Question

[Ed G]

Hello,
 I am trying to understand the operation of the KAT500 utility.  Not
sure if my problem is pilot error or maybe a problem within the tuner
itself.  I have the latest firmware installed.
 I am unable to manually select the antenna using the utility. I cannot
physically check the tuner as it is in a remote location. Each time I select
an antenna other than ANT1 using the radio buttons, the selection reverts
back to ANT1. This happens whether in Bypass, Manual, or Auto modes.  I have
verified the antenna setup per band. In my case I want to use ANT2 for 80
meters, and have set this up in the antenna tab. I have even disabled ANT1
for 80 meters, but the utility still won't let me select ANT2 for 80 meters.
The KAT500 also does not automatically switch when RF is applied, even
though the utility will read the correct 3.5 MHz frequency.
 Any ides for what to check?
--Ed--



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[Elecraft] KAT500 utility works -- then doesn't

[John Shadle]

Hi all,
After finishing up my K3S build with only one incident (the 400Hz filters
mysteriously not working in the new rig -- they are now at Elecraft for
testing, FYI), I am reconnecting my K3S and the rest of my station.
Finally, I got motivated to finally get my KAT500 connected to my computer!

I installed the latest version of the utility and all was good. I was able
to view the SWR and FWD/REF power as the unit trained itself (after
clearing the memories, first). Then, without warning, the utility stopped
recognizing the KAT500. The COM port is still there and it hasn't changed,
but the KAT500 is no longer found. Many options are now grayed out.

I've tried changing the COM port assignment for the KXUSB adapter, but that
does nothing. I tried removing then reinstalling the adapter, which also
results in no change.

Any ideas what is going on? Could RF have somehow gotten into the
controller in the KAT500 to make it not respond to the KXUSB polling?

The KAT500 still tunes as usual, but I'm just not able to access the unit
at all via the computer interface.

Thanks for your help.
-john NE4U
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Re: [Elecraft] KAT500 tuning problem

[Bill]

That was my first thought - so I laid out a new coax to the antenna.

That said, this morning everything works just fine. I can only figure 
the KAT500 heard me say that it was leaving and it decided to work. Be 
interesting to see how long this holds.


Bill W2BLC
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[Elecraft] KAT500 tuning problem

[Bill]

For the past month I have been experiencing tuning problems with the 
KAT500.


The antenna in question is a simple 75 meter dipole fed with coax. You 
tune the antenna at 3922, 2955 and 3975 - just for example. When you 
return to those frequencies, a few hours later, the tuning is all off 
and the KPA500 demos its displeasure by beeping and flashing lights. 
Retuning will again hold for a few hours, then all goes haywire again.


I have given shake test to the antenna/halyards -  with an analog SWR 
bridge in line - and see nothing to indicate breaks or damage. I 
replaced the feed line and it still does everything the same. All coax 
lines inside have also been changed out - to no avail.


I should mention that this problem exists on an alternate antenna also. 
The alternate is also a dipole type. No remote baluns, nothing other 
than simple center insulators. Chances are they are built properly - 
been doing it for over 55 years and have never experienced anything like 
this.


I have reset the KAT500 to default a couple of times - reinstalled the 
software - all the things you do with black boxes - went through the 
training thing. I spoken with Elecraft and followed their instructions 
to the letter also (which were the same as what I had been doing). It 
all holds well for a few hours, then goes wacko.


If I have to push the buttons every time I QSY, there is little reason 
to continuing using the KAT500. Of course that makes using the KPA500 
more difficult or impossible.


Shipping is expensive and so are service charges - the tuner is way out 
of warranty.


Anyone have experiences such as these or suggestions?

I am seriously considering regressing to a manual tuner.

Thanks,

Bill W2BLC K-Line



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Re: [Elecraft] KAT500 tuning problem

[Keith Onishi]

Have you checked your KAT500 with a dummy load instead of feed line? 
This would tell you either your KAT500 or feed line to antenna (and antenna) is 
in trouble.

73 de JH3SIF, Keith

> 2016/02/05 6:17、Bill  のメール：
> 
> For the past month I have been experiencing tuning problems with the KAT500.
> 
> The antenna in question is a simple 75 meter dipole fed with coax. You tune 
> the antenna at 3922, 2955 and 3975 - just for example. When you return to 
> those frequencies, a few hours later, the tuning is all off and the KPA500 
> demos its displeasure by beeping and flashing lights. Retuning will again 
> hold for a few hours, then all goes haywire again.
> 
> I have given shake test to the antenna/halyards -  with an analog SWR bridge 
> in line - and see nothing to indicate breaks or damage. I replaced the feed 
> line and it still does everything the same. All coax lines inside have also 
> been changed out - to no avail.
> 
> I should mention that this problem exists on an alternate antenna also. The 
> alternate is also a dipole type. No remote baluns, nothing other than simple 
> center insulators. Chances are they are built properly - been doing it for 
> over 55 years and have never experienced anything like this.
> 
> I have reset the KAT500 to default a couple of times - reinstalled the 
> software - all the things you do with black boxes - went through the training 
> thing. I spoken with Elecraft and followed their instructions to the letter 
> also (which were the same as what I had been doing). It all holds well for a 
> few hours, then goes wacko.
> 
> If I have to push the buttons every time I QSY, there is little reason to 
> continuing using the KAT500. Of course that makes using the KPA500 more 
> difficult or impossible.
> 
> Shipping is expensive and so are service charges - the tuner is way out of 
> warranty.
> 
> Anyone have experiences such as these or suggestions?
> 
> I am seriously considering regressing to a manual tuner.
> 
> Thanks,
> 
> Bill W2BLC K-Line
> 
> 
> 
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Re: [Elecraft] KAT500 Change Idea

[Bill]

Just so all know - I do use the MAN mode. It is too crazy in AUTO - 
always working and jumping around.


Bill W2BLC


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Re: [Elecraft] KAT500 tuning problem

[Don Wilhelm]

Bill,

After you do the initial TUNE (training the ATU), do you switch it to 
MAN?  If not try that and see if it corrects your situation.

If not, then it is time to contact support.

73,
Don W3FPR

On 2/4/2016 4:17 PM, Bill wrote:
For the past month I have been experiencing tuning problems with the 
KAT500.


The antenna in question is a simple 75 meter dipole fed with coax. You 
tune the antenna at 3922, 2955 and 3975 - just for example. When you 
return to those frequencies, a few hours later, the tuning is all off 
and the KPA500 demos its displeasure by beeping and flashing lights. 
Retuning will again hold for a few hours, then all goes haywire again.


I have given shake test to the antenna/halyards -  with an analog SWR 
bridge in line - and see nothing to indicate breaks or damage. I 
replaced the feed line and it still does everything the same. All coax 
lines inside have also been changed out - to no avail.


I should mention that this problem exists on an alternate antenna 
also. The alternate is also a dipole type. No remote baluns, nothing 
other than simple center insulators. Chances are they are built 
properly - been doing it for over 55 years and have never experienced 
anything like this.


I have reset the KAT500 to default a couple of times - reinstalled the 
software - all the things you do with black boxes - went through the 
training thing. I spoken with Elecraft and followed their instructions 
to the letter also (which were the same as what I had been doing). It 
all holds well for a few hours, then goes wacko.




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[Elecraft] KAT500 Change Idea

[Harry Yingst via Elecraft]

Is it to have a change made to the KAT500 firmware so we could lock it in 
Manual Mode
or Maybe use a double tap to change mode and still a press and hold to turn it 
off


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Re: [Elecraft] KAT500 tuning problem

[Jim Miller]

Since you are running KPA500 along with the KAT500 and you stated you don't
have a balun, I assume you don't have a common mode choke either.

I suggest a trip to http://audiosystemsgroup.com/RFI-Ham.pdf as I suspect
you have RF in the shack.

73

jim ab3cv



On Thu, Feb 4, 2016 at 7:11 PM, Wes (N7WS)  wrote:

> After a good tune, I would use the KAT500 utility to examine and record
> the selected component values.
>
> When the failure occurs, before retuning I would look at them again and
> see if they are the same.
>
> Also after a good tune, I would run up and down the band to cycle the
> relays and see if things are the same when returning to a previously tuned
> band segment.
>
> On 2/4/2016 2:17 PM, Bill wrote:
>
>> For the past month I have been experiencing tuning problems with the
>> KAT500.
>>
>> The antenna in question is a simple 75 meter dipole fed with coax. You
>> tune the antenna at 3922, 2955 and 3975 - just for example. When you return
>> to those frequencies, a few hours later, the tuning is all off and the
>> KPA500 demos its displeasure by beeping and flashing lights. Retuning will
>> again hold for a few hours, then all goes haywire again.
>>
>> I have given shake test to the antenna/halyards -  with an analog SWR
>> bridge in line - and see nothing to indicate breaks or damage. I replaced
>> the feed line and it still does everything the same. All coax lines inside
>> have also been changed out - to no avail.
>>
>> I should mention that this problem exists on an alternate antenna also.
>> The alternate is also a dipole type. No remote baluns, nothing other than
>> simple center insulators. Chances are they are built properly - been doing
>> it for over 55 years and have never experienced anything like this.
>>
>> I have reset the KAT500 to default a couple of times - reinstalled the
>> software - all the things you do with black boxes - went through the
>> training thing. I spoken with Elecraft and followed their instructions to
>> the letter also (which were the same as what I had been doing). It all
>> holds well for a few hours, then goes wacko.
>>
>> If I have to push the buttons every time I QSY, there is little reason to
>> continuing using the KAT500. Of course that makes using the KPA500 more
>> difficult or impossible.
>>
>> Shipping is expensive and so are service charges - the tuner is way out
>> of warranty.
>>
>> Anyone have experiences such as these or suggestions?
>>
>> I am seriously considering regressing to a manual tuner.
>>
>> Thanks,
>>
>> Bill W2BLC K-Line
>>
>>
>>
>> __
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>>
>>
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Re: [Elecraft] KAT500 tuning problem

[Bill]

I have done the reading of the printout - some really crazy SWR numbers 
for the antenna that I know are not correct.


So far as RF in the shack - I might consider that - if things had not 
been working correctly until abut a month ago. Nothing has changed until 
then, causing all the efforts and modifications to isolate the problem. 
Other rigs - with ATUs - are working just fine with the entire station.


Everything RF is brought into the house to a well grounded bulkhead. 
Longest run from any rig/amp/tuner is 6 feet to the bulkhead. 
Interconnects are all as short as possible. Equipment is all connected 
to a central grounding point. In other words - been there and done that 
out of habit.


Tonight I am running barefoot with the antenna running direct to the K3 
- all is good. Tomorrow I will try to get everything back to where it 
was before this mess started and tune when I QSO as a routine and forget 
whatever else the tuner is supposed to do. Sure reminds me of what it 
was doing when I first got it.


A manual tuner will be ordered very soon and the KAT500 removed from the 
lineup.


I don't see a magic bullet on this - thanks for all the ideas.

Bill W2BLC




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Re: [Elecraft] KAT500 tuning problem

[john]

It is possible that you have bad coax, a bad connection or water ingress in
your antenna system. It would be interesting to see if a manual tuner
remains stable.

John KK9A



Bill w2blc at nycap.rr.com 
Thu Feb 4 19:39:04 EST 2016
for the antenna that I know are not correct.

So far as RF in the shack - I might consider that - if things had not 
been working correctly until abut a month ago. Nothing has changed until 
then, causing all the efforts and modifications to isolate the problem. 
Other rigs - with ATUs - are working just fine with the entire station.

Everything RF is brought into the house to a well grounded bulkhead. 
Longest run from any rig/amp/tuner is 6 feet to the bulkhead. 
Interconnects are all as short as possible. Equipment is all connected 
to a central grounding point. In other words - been there and done that 
out of habit.

Tonight I am running barefoot with the antenna running direct to the K3 
- all is good. Tomorrow I will try to get everything back to where it 
was before this mess started and tune when I QSO as a routine and forget 
whatever else the tuner is supposed to do. Sure reminds me of what it 
was doing when I first got it.

A manual tuner will be ordered very soon and the KAT500 removed from the 
lineup.

I don't see a magic bullet on this - thanks for all the ideas.

Bill W2BLC

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Re: [Elecraft] KAT500 tuning problem

[Wes (N7WS)]

After a good tune, I would use the KAT500 utility to examine and record the 
selected component values.


When the failure occurs, before retuning I would look at them again and see if 
they are the same.


Also after a good tune, I would run up and down the band to cycle the relays and 
see if things are the same when returning to a previously tuned band segment.


On 2/4/2016 2:17 PM, Bill wrote:

For the past month I have been experiencing tuning problems with the KAT500.

The antenna in question is a simple 75 meter dipole fed with coax. You tune 
the antenna at 3922, 2955 and 3975 - just for example. When you return to 
those frequencies, a few hours later, the tuning is all off and the KPA500 
demos its displeasure by beeping and flashing lights. Retuning will again hold 
for a few hours, then all goes haywire again.


I have given shake test to the antenna/halyards -  with an analog SWR bridge 
in line - and see nothing to indicate breaks or damage. I replaced the feed 
line and it still does everything the same. All coax lines inside have also 
been changed out - to no avail.


I should mention that this problem exists on an alternate antenna also. The 
alternate is also a dipole type. No remote baluns, nothing other than simple 
center insulators. Chances are they are built properly - been doing it for 
over 55 years and have never experienced anything like this.


I have reset the KAT500 to default a couple of times - reinstalled the 
software - all the things you do with black boxes - went through the training 
thing. I spoken with Elecraft and followed their instructions to the letter 
also (which were the same as what I had been doing). It all holds well for a 
few hours, then goes wacko.


If I have to push the buttons every time I QSY, there is little reason to 
continuing using the KAT500. Of course that makes using the KPA500 more 
difficult or impossible.


Shipping is expensive and so are service charges - the tuner is way out of 
warranty.


Anyone have experiences such as these or suggestions?

I am seriously considering regressing to a manual tuner.

Thanks,

Bill W2BLC K-Line



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[Elecraft] KAT500 Antenna and Alpha 87A

[Amateur Radio Operator N5GE]

I'm about to send my KPA500 To the shop at Elecraft and I wonder if
anyone has had any success using an ALPHA 87A runing low power into
KAT500?

If so how many watts did you run into the KTA500?

Thanks.

ARS N5GE

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Re: [Elecraft] KAT500 Antenna and Alpha 87A

[KD7PY]

Per page 2 of the manual :

3 - 30 Mhz 600W into 5 > 500 ohm  ( 10:1 swr )
1000W into 16 > 150 ohm  ( 3.1 swr )

1.8 - 2 Mhz   600W into 500 ohm  (5:1 low imp swr)  ( 10:1  Hi Imp.
swr )   



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View this message in context: 
http://elecraft.365791.n2.nabble.com/KAT500-Antenna-and-Alpha-87A-tp7610620p7610631.html
Sent from the Elecraft mailing list archive at Nabble.com.
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Re: [Elecraft] KAT500 Re-Tuning

[Dick Dievendorff]

If the band lines are used only, the ATU picks a mid band freq if there is no 
history since last ATU power up.  On first tx after that, it performs a memory 
recall tune using the counted freq. 

Power up means DC power applied.

A k3 can provide approx freq on RX thru the ACC cable, depending on a menu 
setting 

Dick, K6KR

> On Nov 15, 2015, at 16:20, Cliff Frescura <c...@cfcorp.com> wrote:
> 
> I went back and reviewed the KAT500 command set and it doesn't look like
> this is possible because the serial protocol does not have a way to
> communicate split status.  I've been knee deep in the KPA500 serial protocol
> (with great results thanks to Jack W6FB) and thought they may have some high
> level similarities, but not really.
> 
> Do you know how the KAT500 interprets frequency, if driving only the band
> data lines (BAND0-3) via an external TTL device?  Does it pick middle of the
> band if there is no last used frequency?
> 
> 73,
> 
> Cliff K3LL
> 
> -Original Message-
> From: Cliff Frescura [mailto:c...@cfcorp.com] 
> Sent: Sunday, November 15, 2015 2:58 PM
> To: 'Cady, Fred'; 'Elecraft@mailman.qth.net'
> Subject: RE: [Elecraft] KAT500 Re-Tuning
> 
> Apparently yes.  However, I'm using the KAT500 serial port to communicate
> frequency to the KAT500 via logging software (DXLabs), not auxBus, since the
> radio is not a K3/S.
> 
> 73,
> 
> Cliff K3LL
> 
> -Original Message-
> From: Cady, Fred [mailto:fc...@montana.edu]
> Sent: Sunday, November 15, 2015 2:28 PM
> To: Cliff Frescura; Elecraft@mailman.qth.net
> Subject: Re: [Elecraft] KAT500 Re-Tuning
> 
> Are you asking for the KAT500 to choose two different tuning solutions when
> operating split?  At present it chooses the VFO B frequency for its solution
> according to:
> 
> MCU 4.83 / DSP 2.82, 2-8-2014
> 
> * FSK-D (RTTY) POWER-CONTROL BUG FIX: Power output can now be increased
> while in transmit mode when using FSK-D.
> 
> * KAT500 ATU SUPPORT: Automatic retuning of KAT500 LC network as K3 VFO is
> moved. VFO frequency messages are sent via the auxBus. Sends VFO A frequency
> except in SPLIT mode, where VFO B frequency is sent.
> 
> Cheers,
> Fred KE7X
> www.ke7x.com for all KE7X Elecraft books.
> 
> From: Elecraft <elecraft-boun...@mailman.qth.net> on behalf of Cliff
> Frescura <c...@cfcorp.com>
> Sent: Sunday, November 15, 2015 3:09 PM
> To: elecraft@mailman.qth.net
> Subject: Re: [Elecraft] KAT500 Re-Tuning
> 
> Antenna issues specific to the OP aside, there is a valid reason to have the
> KAT500 recognize split and inhibit retuning/recall.
> 
> The need for this functionality is very apparent when running split on 40m
> SSB when the DX is below 7.1 MHz and listening up much higher than 5KHz for
> anyone using a narrow bandwidth 40m antenna.  Consider that the KAT500
> already tuned the antenna on your TX, so the "fix the antenna solution"
> doesn't apply.  Listening ~50KHz away should not require any retuning since
> the tuner's settings at your TX should be good enough for RX.
> 
> Here is how it would work:
> 
> 1. When the KAT500 sees a *transition* from split off to split on...
>a. The KAT500 would recall settings for TX Frequency or retune
> (under the VSWR settings condition) when it sees RF for the first time after
> this split transition 2. When split is on (Split mode)
>b. The tuner should not change any settings regardless of
> frequency/band - except under VSWR conditions based on settings.
>c. Perhaps both the "Auto" and "Man" indicators would be on in order
> to indicate this mode on the KAT front panel.
> 3. When the KAT500 sees a transition from split on to split off then go into
> "normal" (non Split) mode.
> 
> The main reason I am using the tuner is because of a compromise antenna.  If
> the antenna was flat enough across the band I wouldn't even engage it.  In
> my specific situation there is also at KPA500 connected, so the way that the
> KAT500 works today will result in the KAT inhibiting the KPA while it
> retunes/recalls.  Although fast, I suspect that the amp is not engaged
> initially when I send (speak) my call sign in the pile.  On very rare
> occasions there is also a KPA VSWR Fault.  While probably not an issue, the
> amount of relay chatter in very short period of time between fast RX/TX/RX
> transitions is a bit unsettling.
> 
> 73,
> 
> Cliff K3LL
> 
> 
> -Original Message-
> From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Jim
> Brown
> Sent: Sunday, November 15, 2015 10:04 AM
> To: elecraft@mailman.qth.net
> Subject: Re: [Elecraft] KAT500 

Re: [Elecraft] KAT500 Re-Tuning

[Cliff Frescura]

Thanks -this is helpful information.  If going the hardware route, I am
inclined to implement the logic via an RS-232 wedge device vs implementing a
BAND0-3 device (basically an antenna switch).

73,

Cliff K3LL/6

-Original Message-
From: Dick Dievendorff [mailto:d...@elecraft.com] 
Sent: Monday, November 16, 2015 9:36 PM
To: Cliff Frescura
Cc: Cady, Fred; Elecraft@mailman.qth.net
Subject: Re: [Elecraft] KAT500 Re-Tuning

If the band lines are used only, the ATU picks a mid band freq if there is
no history since last ATU power up.  On first tx after that, it performs a
memory recall tune using the counted freq. 

Power up means DC power applied.

A k3 can provide approx freq on RX thru the ACC cable, depending on a menu
setting 

Dick, K6KR

> On Nov 15, 2015, at 16:20, Cliff Frescura <c...@cfcorp.com> wrote:
> 
> I went back and reviewed the KAT500 command set and it doesn't look 
> like this is possible because the serial protocol does not have a way 
> to communicate split status.  I've been knee deep in the KPA500 serial 
> protocol (with great results thanks to Jack W6FB) and thought they may 
> have some high level similarities, but not really.
> 
> Do you know how the KAT500 interprets frequency, if driving only the 
> band data lines (BAND0-3) via an external TTL device?  Does it pick 
> middle of the band if there is no last used frequency?
> 
> 73,
> 
> Cliff K3LL
> 
> -Original Message-
> From: Cliff Frescura [mailto:c...@cfcorp.com]
> Sent: Sunday, November 15, 2015 2:58 PM
> To: 'Cady, Fred'; 'Elecraft@mailman.qth.net'
> Subject: RE: [Elecraft] KAT500 Re-Tuning
> 
> Apparently yes.  However, I'm using the KAT500 serial port to 
> communicate frequency to the KAT500 via logging software (DXLabs), not 
> auxBus, since the radio is not a K3/S.
> 
> 73,
> 
> Cliff K3LL
> 
> -Original Message-
> From: Cady, Fred [mailto:fc...@montana.edu]
> Sent: Sunday, November 15, 2015 2:28 PM
> To: Cliff Frescura; Elecraft@mailman.qth.net
> Subject: Re: [Elecraft] KAT500 Re-Tuning
> 
> Are you asking for the KAT500 to choose two different tuning solutions 
> when operating split?  At present it chooses the VFO B frequency for 
> its solution according to:
> 
> MCU 4.83 / DSP 2.82, 2-8-2014
> 
> * FSK-D (RTTY) POWER-CONTROL BUG FIX: Power output can now be 
> increased while in transmit mode when using FSK-D.
> 
> * KAT500 ATU SUPPORT: Automatic retuning of KAT500 LC network as K3 
> VFO is moved. VFO frequency messages are sent via the auxBus. Sends 
> VFO A frequency except in SPLIT mode, where VFO B frequency is sent.
> 
> Cheers,
> Fred KE7X
> www.ke7x.com for all KE7X Elecraft books.
> 
> From: Elecraft <elecraft-boun...@mailman.qth.net> on behalf of Cliff 
> Frescura <c...@cfcorp.com>
> Sent: Sunday, November 15, 2015 3:09 PM
> To: elecraft@mailman.qth.net
> Subject: Re: [Elecraft] KAT500 Re-Tuning
> 
> Antenna issues specific to the OP aside, there is a valid reason to 
> have the
> KAT500 recognize split and inhibit retuning/recall.
> 
> The need for this functionality is very apparent when running split on 
> 40m SSB when the DX is below 7.1 MHz and listening up much higher than 
> 5KHz for anyone using a narrow bandwidth 40m antenna.  Consider that 
> the KAT500 already tuned the antenna on your TX, so the "fix the antenna
solution"
> doesn't apply.  Listening ~50KHz away should not require any retuning 
> since the tuner's settings at your TX should be good enough for RX.
> 
> Here is how it would work:
> 
> 1. When the KAT500 sees a *transition* from split off to split on...
>a. The KAT500 would recall settings for TX Frequency or retune 
> (under the VSWR settings condition) when it sees RF for the first time 
> after this split transition 2. When split is on (Split mode)
>b. The tuner should not change any settings regardless of 
> frequency/band - except under VSWR conditions based on settings.
>c. Perhaps both the "Auto" and "Man" indicators would be on in 
> order to indicate this mode on the KAT front panel.
> 3. When the KAT500 sees a transition from split on to split off then 
> go into "normal" (non Split) mode.
> 
> The main reason I am using the tuner is because of a compromise 
> antenna.  If the antenna was flat enough across the band I wouldn't 
> even engage it.  In my specific situation there is also at KPA500 
> connected, so the way that the
> KAT500 works today will result in the KAT inhibiting the KPA while it 
> retunes/recalls.  Although fast, I suspect that the amp is not engaged 
> initially when I send (speak) my call sign in the pile.  On very rare 
> occasions 

Re: [Elecraft] KAT500 Re-Tuning

[Cliff Frescura]

Antenna issues specific to the OP aside, there is a valid reason to have the
KAT500 recognize split and inhibit retuning/recall.

The need for this functionality is very apparent when running split on 40m
SSB when the DX is below 7.1 MHz and listening up much higher than 5KHz for
anyone using a narrow bandwidth 40m antenna.  Consider that the KAT500
already tuned the antenna on your TX, so the "fix the antenna solution"
doesn't apply.  Listening ~50KHz away should not require any retuning since
the tuner's settings at your TX should be good enough for RX.

Here is how it would work:

1. When the KAT500 sees a *transition* from split off to split on...
a. The KAT500 would recall settings for TX Frequency or retune
(under the VSWR settings condition) when it sees RF for the first time after
this split transition
2. When split is on (Split mode)
b. The tuner should not change any settings regardless of
frequency/band - except under VSWR conditions based on settings.
c. Perhaps both the "Auto" and "Man" indicators would be on in order
to indicate this mode on the KAT front panel.
3. When the KAT500 sees a transition from split on to split off then go into
"normal" (non Split) mode.

The main reason I am using the tuner is because of a compromise antenna.  If
the antenna was flat enough across the band I wouldn't even engage it.  In
my specific situation there is also at KPA500 connected, so the way that the
KAT500 works today will result in the KAT inhibiting the KPA while it
retunes/recalls.  Although fast, I suspect that the amp is not engaged
initially when I send (speak) my call sign in the pile.  On very rare
occasions there is also a KPA VSWR Fault.  While probably not an issue, the
amount of relay chatter in very short period of time between fast RX/TX/RX
transitions is a bit unsettling.

73,

Cliff K3LL


-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Jim
Brown
Sent: Sunday, November 15, 2015 10:04 AM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] KAT500 Re-Tuning

On Sat,11/14/2015 8:37 PM, Byron Peebles wrote:
> I will put the antenna analyzer on it tomorrow and make sure it's 
> still solid after all this wind.

Other suggestions. First, put it on bypass and see what the SWR indication
is. If it's reasonable, go to MAN mode, force a tuning (put
K3 in TUN mode) and let it tune.

Carefully check the entire coax path between K3 and the antenna. All
connectors should be finger tight, then tighten with gas pliers.

Any indication that the coax is wet? Moisture entering anywhere along the
run will usually migrate all the way down to the lowest point. Open
connectors to see if there's any moisture. A good way to test is to use a
tissue or paper towel as a probe.

If you have TDR capability, look at the feedline for any discontinuities.
You should see connectors, the antenna, and any switching between the
antenna and your test point. Most vector analyzers can do TDR. If you don't
have one of them, ask around your ham neighbors to borrow one (and ask them
to help you do the measurement).

73, Jim K9YC
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Re: [Elecraft] KAT500 Re-Tuning

[Cady, Fred]

Are you asking for the KAT500 to choose two different tuning solutions when 
operating split?  At present it chooses the VFO B frequency for its solution 
according to:

MCU 4.83 / DSP 2.82, 2-8-2014

* FSK-D (RTTY) POWER-CONTROL BUG FIX: Power output can now be increased while 
in transmit mode when using FSK-D.

* KAT500 ATU SUPPORT: Automatic retuning of KAT500 LC network as K3 VFO is 
moved. VFO frequency messages are sent via the auxBus. Sends VFO A frequency 
except in SPLIT mode, where VFO B frequency is sent.

Cheers,
Fred KE7X
www.ke7x.com for all KE7X Elecraft books.

From: Elecraft <elecraft-boun...@mailman.qth.net> on behalf of Cliff Frescura 
<c...@cfcorp.com>
Sent: Sunday, November 15, 2015 3:09 PM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] KAT500 Re-Tuning

Antenna issues specific to the OP aside, there is a valid reason to have the
KAT500 recognize split and inhibit retuning/recall.

The need for this functionality is very apparent when running split on 40m
SSB when the DX is below 7.1 MHz and listening up much higher than 5KHz for
anyone using a narrow bandwidth 40m antenna.  Consider that the KAT500
already tuned the antenna on your TX, so the "fix the antenna solution"
doesn't apply.  Listening ~50KHz away should not require any retuning since
the tuner's settings at your TX should be good enough for RX.

Here is how it would work:

1. When the KAT500 sees a *transition* from split off to split on...
a. The KAT500 would recall settings for TX Frequency or retune
(under the VSWR settings condition) when it sees RF for the first time after
this split transition
2. When split is on (Split mode)
b. The tuner should not change any settings regardless of
frequency/band - except under VSWR conditions based on settings.
c. Perhaps both the "Auto" and "Man" indicators would be on in order
to indicate this mode on the KAT front panel.
3. When the KAT500 sees a transition from split on to split off then go into
"normal" (non Split) mode.

The main reason I am using the tuner is because of a compromise antenna.  If
the antenna was flat enough across the band I wouldn't even engage it.  In
my specific situation there is also at KPA500 connected, so the way that the
KAT500 works today will result in the KAT inhibiting the KPA while it
retunes/recalls.  Although fast, I suspect that the amp is not engaged
initially when I send (speak) my call sign in the pile.  On very rare
occasions there is also a KPA VSWR Fault.  While probably not an issue, the
amount of relay chatter in very short period of time between fast RX/TX/RX
transitions is a bit unsettling.

73,

Cliff K3LL


-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Jim
Brown
Sent: Sunday, November 15, 2015 10:04 AM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] KAT500 Re-Tuning

On Sat,11/14/2015 8:37 PM, Byron Peebles wrote:
> I will put the antenna analyzer on it tomorrow and make sure it's
> still solid after all this wind.

Other suggestions. First, put it on bypass and see what the SWR indication
is. If it's reasonable, go to MAN mode, force a tuning (put
K3 in TUN mode) and let it tune.

Carefully check the entire coax path between K3 and the antenna. All
connectors should be finger tight, then tighten with gas pliers.

Any indication that the coax is wet? Moisture entering anywhere along the
run will usually migrate all the way down to the lowest point. Open
connectors to see if there's any moisture. A good way to test is to use a
tissue or paper towel as a probe.

If you have TDR capability, look at the feedline for any discontinuities.
You should see connectors, the antenna, and any switching between the
antenna and your test point. Most vector analyzers can do TDR. If you don't
have one of them, ask around your ham neighbors to borrow one (and ask them
to help you do the measurement).

73, Jim K9YC
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Re: [Elecraft] KAT500 Re-Tuning

[Cliff Frescura]

I went back and reviewed the KAT500 command set and it doesn't look like
this is possible because the serial protocol does not have a way to
communicate split status.  I've been knee deep in the KPA500 serial protocol
(with great results thanks to Jack W6FB) and thought they may have some high
level similarities, but not really.

Do you know how the KAT500 interprets frequency, if driving only the band
data lines (BAND0-3) via an external TTL device?  Does it pick middle of the
band if there is no last used frequency?

73,

Cliff K3LL

-Original Message-
From: Cliff Frescura [mailto:c...@cfcorp.com] 
Sent: Sunday, November 15, 2015 2:58 PM
To: 'Cady, Fred'; 'Elecraft@mailman.qth.net'
Subject: RE: [Elecraft] KAT500 Re-Tuning

Apparently yes.  However, I'm using the KAT500 serial port to communicate
frequency to the KAT500 via logging software (DXLabs), not auxBus, since the
radio is not a K3/S.

73,

Cliff K3LL

-Original Message-
From: Cady, Fred [mailto:fc...@montana.edu]
Sent: Sunday, November 15, 2015 2:28 PM
To: Cliff Frescura; Elecraft@mailman.qth.net
Subject: Re: [Elecraft] KAT500 Re-Tuning

Are you asking for the KAT500 to choose two different tuning solutions when
operating split?  At present it chooses the VFO B frequency for its solution
according to:

MCU 4.83 / DSP 2.82, 2-8-2014

* FSK-D (RTTY) POWER-CONTROL BUG FIX: Power output can now be increased
while in transmit mode when using FSK-D.

* KAT500 ATU SUPPORT: Automatic retuning of KAT500 LC network as K3 VFO is
moved. VFO frequency messages are sent via the auxBus. Sends VFO A frequency
except in SPLIT mode, where VFO B frequency is sent.

Cheers,
Fred KE7X
www.ke7x.com for all KE7X Elecraft books.

From: Elecraft <elecraft-boun...@mailman.qth.net> on behalf of Cliff
Frescura <c...@cfcorp.com>
Sent: Sunday, November 15, 2015 3:09 PM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] KAT500 Re-Tuning

Antenna issues specific to the OP aside, there is a valid reason to have the
KAT500 recognize split and inhibit retuning/recall.

The need for this functionality is very apparent when running split on 40m
SSB when the DX is below 7.1 MHz and listening up much higher than 5KHz for
anyone using a narrow bandwidth 40m antenna.  Consider that the KAT500
already tuned the antenna on your TX, so the "fix the antenna solution"
doesn't apply.  Listening ~50KHz away should not require any retuning since
the tuner's settings at your TX should be good enough for RX.

Here is how it would work:

1. When the KAT500 sees a *transition* from split off to split on...
a. The KAT500 would recall settings for TX Frequency or retune
(under the VSWR settings condition) when it sees RF for the first time after
this split transition 2. When split is on (Split mode)
b. The tuner should not change any settings regardless of
frequency/band - except under VSWR conditions based on settings.
c. Perhaps both the "Auto" and "Man" indicators would be on in order
to indicate this mode on the KAT front panel.
3. When the KAT500 sees a transition from split on to split off then go into
"normal" (non Split) mode.

The main reason I am using the tuner is because of a compromise antenna.  If
the antenna was flat enough across the band I wouldn't even engage it.  In
my specific situation there is also at KPA500 connected, so the way that the
KAT500 works today will result in the KAT inhibiting the KPA while it
retunes/recalls.  Although fast, I suspect that the amp is not engaged
initially when I send (speak) my call sign in the pile.  On very rare
occasions there is also a KPA VSWR Fault.  While probably not an issue, the
amount of relay chatter in very short period of time between fast RX/TX/RX
transitions is a bit unsettling.

73,

Cliff K3LL


-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Jim
Brown
Sent: Sunday, November 15, 2015 10:04 AM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] KAT500 Re-Tuning

On Sat,11/14/2015 8:37 PM, Byron Peebles wrote:
> I will put the antenna analyzer on it tomorrow and make sure it's 
> still solid after all this wind.

Other suggestions. First, put it on bypass and see what the SWR indication
is. If it's reasonable, go to MAN mode, force a tuning (put
K3 in TUN mode) and let it tune.

Carefully check the entire coax path between K3 and the antenna. All
connectors should be finger tight, then tighten with gas pliers.

Any indication that the coax is wet? Moisture entering anywhere along the
run will usually migrate all the way down to the lowest point. Open
connectors to see if there's any moisture. A good way to test is to use a
tissue or paper towel as a probe.

If you have TDR capability, look at the feedline for any discontinuities.
You should see connectors, the antenna, and any switching between the
antenna and your test point. Most vector analy

Re: [Elecraft] KAT500 Re-Tuning

[Cliff Frescura]

Apparently yes.  However, I'm using the KAT500 serial port to communicate
frequency to the KAT500 via logging software (DXLabs), not auxBus, since the
radio is not a K3/S.

73,

Cliff K3LL

-Original Message-
From: Cady, Fred [mailto:fc...@montana.edu] 
Sent: Sunday, November 15, 2015 2:28 PM
To: Cliff Frescura; Elecraft@mailman.qth.net
Subject: Re: [Elecraft] KAT500 Re-Tuning

Are you asking for the KAT500 to choose two different tuning solutions when
operating split?  At present it chooses the VFO B frequency for its solution
according to:

MCU 4.83 / DSP 2.82, 2-8-2014

* FSK-D (RTTY) POWER-CONTROL BUG FIX: Power output can now be increased
while in transmit mode when using FSK-D.

* KAT500 ATU SUPPORT: Automatic retuning of KAT500 LC network as K3 VFO is
moved. VFO frequency messages are sent via the auxBus. Sends VFO A frequency
except in SPLIT mode, where VFO B frequency is sent.

Cheers,
Fred KE7X
www.ke7x.com for all KE7X Elecraft books.

From: Elecraft <elecraft-boun...@mailman.qth.net> on behalf of Cliff
Frescura <c...@cfcorp.com>
Sent: Sunday, November 15, 2015 3:09 PM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] KAT500 Re-Tuning

Antenna issues specific to the OP aside, there is a valid reason to have the
KAT500 recognize split and inhibit retuning/recall.

The need for this functionality is very apparent when running split on 40m
SSB when the DX is below 7.1 MHz and listening up much higher than 5KHz for
anyone using a narrow bandwidth 40m antenna.  Consider that the KAT500
already tuned the antenna on your TX, so the "fix the antenna solution"
doesn't apply.  Listening ~50KHz away should not require any retuning since
the tuner's settings at your TX should be good enough for RX.

Here is how it would work:

1. When the KAT500 sees a *transition* from split off to split on...
a. The KAT500 would recall settings for TX Frequency or retune
(under the VSWR settings condition) when it sees RF for the first time after
this split transition 2. When split is on (Split mode)
b. The tuner should not change any settings regardless of
frequency/band - except under VSWR conditions based on settings.
c. Perhaps both the "Auto" and "Man" indicators would be on in order
to indicate this mode on the KAT front panel.
3. When the KAT500 sees a transition from split on to split off then go into
"normal" (non Split) mode.

The main reason I am using the tuner is because of a compromise antenna.  If
the antenna was flat enough across the band I wouldn't even engage it.  In
my specific situation there is also at KPA500 connected, so the way that the
KAT500 works today will result in the KAT inhibiting the KPA while it
retunes/recalls.  Although fast, I suspect that the amp is not engaged
initially when I send (speak) my call sign in the pile.  On very rare
occasions there is also a KPA VSWR Fault.  While probably not an issue, the
amount of relay chatter in very short period of time between fast RX/TX/RX
transitions is a bit unsettling.

73,

Cliff K3LL


-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Jim
Brown
Sent: Sunday, November 15, 2015 10:04 AM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] KAT500 Re-Tuning

On Sat,11/14/2015 8:37 PM, Byron Peebles wrote:
> I will put the antenna analyzer on it tomorrow and make sure it's 
> still solid after all this wind.

Other suggestions. First, put it on bypass and see what the SWR indication
is. If it's reasonable, go to MAN mode, force a tuning (put
K3 in TUN mode) and let it tune.

Carefully check the entire coax path between K3 and the antenna. All
connectors should be finger tight, then tighten with gas pliers.

Any indication that the coax is wet? Moisture entering anywhere along the
run will usually migrate all the way down to the lowest point. Open
connectors to see if there's any moisture. A good way to test is to use a
tissue or paper towel as a probe.

If you have TDR capability, look at the feedline for any discontinuities.
You should see connectors, the antenna, and any switching between the
antenna and your test point. Most vector analyzers can do TDR. If you don't
have one of them, ask around your ham neighbors to borrow one (and ask them
to help you do the measurement).

73, Jim K9YC
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T

Re: [Elecraft] KAT500 Ant outlets

[G4GNX - Alan]

Thanks Don and all others who replied.

I have not previously run the KAT500 utility, so was unaware of its 
capabilities. I have it installed now and I'm studying the facilities.


73,

Alan. G4GNX

-Original Message- 
From: Don Wilhelm

Sent: Sunday, November 15, 2015 4:47 AM
To: Robert Clark ; j...@audiosystemsgroup.com
Cc: elecraft@mailman.qth.net
Subject: Re: [Elecraft] KAT500 Ant outlets

Robert,

The KAT500 can select 1 of 3 antennas for any band.  All you need to do
is select the antenna of interest from the Front Panel - no computer
required.

KAT500 Utility can make the setup of the various bands and antennas
easier than doing it manually.  That does require a computer, but once
set up, no computer is required.

You can setup the KAT500 without the use of KAT500 Utility, but it will
take longer and require more mechanical steps.
The Utility program can be downloaded from the Elecraft website - it
does not come already installed with the KAT500.

73,
Don W3FPR


On 11/14/2015 10:09 PM, Robert Clark wrote:
Doesn't the KAT500 come with a utility program already installed? 
And...can the unit be operated without a computer connection?





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Re: [Elecraft] KAT500 Re-Tuning

[Jim Brown]

On Sat,11/14/2015 8:37 PM, Byron Peebles wrote:
I will put the antenna analyzer on it tomorrow and make sure it's 
still solid after all this wind.


Other suggestions. First, put it on bypass and see what the SWR 
indication is. If it's reasonable, go to MAN mode, force a tuning (put 
K3 in TUN mode) and let it tune.


Carefully check the entire coax path between K3 and the antenna. All 
connectors should be finger tight, then tighten with gas pliers.


Any indication that the coax is wet? Moisture entering anywhere along 
the run will usually migrate all the way down to the lowest point. Open 
connectors to see if there's any moisture. A good way to test is to use 
a tissue or paper towel as a probe.


If you have TDR capability, look at the feedline for any 
discontinuities. You should see connectors, the antenna, and any 
switching between the antenna and your test point. Most vector analyzers 
can do TDR. If you don't have one of them, ask around your ham neighbors 
to borrow one (and ask them to help you do the measurement).


73, Jim K9YC
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Re: [Elecraft] KAT500 Ant outlets

[Jim Brown]

On Sat,11/14/2015 6:35 PM, G4GNX wrote:

Is it possible to defeat this feature as I tend to use two different multi-band 
antennas, according to conditions.


I do exactly that -- I have two antennas each for all bands, three 
antennas for 40m and 160m. Yes, these settings are programmable in 
almost any combination from the KAT500 Utility. You download and install 
the KAT500 Utility, then open it and look on the Configuration Tab.


73, Jim K9YC

73, Jim K9YC
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Re: [Elecraft] KAT500 Ant outlets

[Don Wilhelm]

Robert,

The KAT500 can select 1 of 3 antennas for any band.  All you need to do 
is select the antenna of interest from the Front Panel - no computer 
required.


KAT500 Utility can make the setup of the various bands and antennas 
easier than doing it manually.  That does require a computer, but once 
set up, no computer is required.


You can setup the KAT500 without the use of KAT500 Utility, but it will 
take longer and require more mechanical steps.
The Utility program can be downloaded from the Elecraft website - it 
does not come already installed with the KAT500.


73,
Don W3FPR


On 11/14/2015 10:09 PM, Robert Clark wrote:

Doesn't the KAT500 come with a utility program already installed? And...can the 
unit be operated without a computer connection?




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Re: [Elecraft] KAT500 Re-Tuning

[Byron Peebles]

I will put the antenna analyzer on it tomorrow and make sure it's still 
solid after all this wind.


On 11/14/2015 11:31 PM, Byron Peebles wrote:

M2 Log Periodic flat from bottom to top.

On 11/14/2015 05:34 PM, Jim Brown wrote:

On Sat,11/14/2015 1:07 PM, Byron Peebles wrote:
Once I tuned I was good for only about 2KHz.  Any thoughts? Antenna 
has been fine everywhere else.


What's the antenna? From the symptom, I suspect it's nowhere near 
resonance on 12m, and the KAT500 is jumping through hoops to get 
power into the feedline. And, if the antenna is a poor match to the 
feedline (which is why it would need a lot of tuning), the loss in 
the feedline is likely to be high.


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Re: [Elecraft] KAT500 Re-Tuning

[Byron Peebles]

M2 Log Periodic flat from bottom to top.

On 11/14/2015 05:34 PM, Jim Brown wrote:

On Sat,11/14/2015 1:07 PM, Byron Peebles wrote:
Once I tuned I was good for only about 2KHz.  Any thoughts? Antenna 
has been fine everywhere else.


What's the antenna? From the symptom, I suspect it's nowhere near 
resonance on 12m, and the KAT500 is jumping through hoops to get power 
into the feedline. And, if the antenna is a poor match to the feedline 
(which is why it would need a lot of tuning), the loss in the feedline 
is likely to be high.


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[Elecraft] KAT500 Ant outlets

[G4GNX]

I am about to buy a KAT500 and having read the owner’s manual (shock horror!) I 
notice that the tuner will choose an antenna according to a particular 
band/frequency it’s encountered before.

Is it possible to defeat this feature as I tend to use two different multi-band 
antennas, according to conditions. The vertical in particular is better for DX, 
with it’s high angle of radiation. I often swap the antennas on the same 
band/frequency, so would not want auto-recognition.

73,

Alan. G4GNX
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Re: [Elecraft] KAT500 Ant outlets

[Robert Clark]

Doesn't the KAT500 come with a utility program already installed? And...can the 
unit be operated without a computer connection?

Robert W. Clark, Executive Director
Center for Professional Development
Career and Technical Education
Temple University

> On Nov 14, 2015, at 9:52 PM, Jim Brown  wrote:
> 
>> On Sat,11/14/2015 6:35 PM, G4GNX wrote:
>> Is it possible to defeat this feature as I tend to use two different 
>> multi-band antennas, according to conditions.
> 
> I do exactly that -- I have two antennas each for all bands, three antennas 
> for 40m and 160m. Yes, these settings are programmable in almost any 
> combination from the KAT500 Utility. You download and install the KAT500 
> Utility, then open it and look on the Configuration Tab.
> 
> 73, Jim K9YC
> 
> 73, Jim K9YC
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Re: [Elecraft] KAT500 Ant outlets

[Jim Brown]

On Sat,11/14/2015 7:09 PM, Robert Clark wrote:

Doesn't the KAT500 come with a utility program already installed? And...can the 
unit be operated without a computer connection?


The KAT500 Utility is a CONFIGURATION UTILITY. Look at it. It allows the 
user to choose which outputs CAN be used on each band. That set of 
choices is saved to the unit. Then, during operation, the user chooses 
the output as he operates using a front panel button that cycles through 
those choices.


Let's say, for example, that my only 30M antenna is on output number 
three. I set the KAT500 so that it automatically goes there when I go to 
30M. Now, I have a 20M-6M SteppIR on output number one and a 20m 
monobander on output number 2. When I go to 20M, the Ant Selector button 
on the KAT500 toggles between output 1 and output 2.


This is a simple example. There are many possibilities. My station has 
monoband antennas for 160, 40, 20, 15, and 10, so I select them with an 
external switch to output number 2. And, like the previous example, my 
SteppIR is on output number 1. On these bands, the front panel button 
toggles me between outputs 1 and 2. I happen to have three antennas for 
40m, so the third one gets switched externally between it and the 30M 
antenna to output #3. So on 40M, the front panel button toggles between 
all three outputs.


Put up a new antenna?  Use the KAT500 Utility to change the config as 
you need it.


Hope this helps.

73, Jim K9YC


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Re: [Elecraft] KAT500 Re-Tuning

[Jim Brown]

On Sat,11/14/2015 1:07 PM, Byron Peebles wrote:
Once I tuned I was good for only about 2KHz.  Any thoughts? Antenna 
has been fine everywhere else.


What's the antenna? From the symptom, I suspect it's nowhere near 
resonance on 12m, and the KAT500 is jumping through hoops to get power 
into the feedline. And, if the antenna is a poor match to the feedline 
(which is why it would need a lot of tuning), the loss in the feedline 
is likely to be high.


73, Jim K9YC
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[Elecraft] KAT500 Re-Tuning

[Byron Peebles]

While working the Willis Island pileup, following the operator on 12 
meters as he stepped up for each QSO, I was having to retune the KAT500 
every few steps.  Which seemed odd. Once I tuned I was good for only 
about 2KHz.  Any thoughts? Antenna has been fine everywhere else.


73, Byron

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Re: [Elecraft] KAT500 Re-Tuning

[Bill Frantz]

Not to mention the losses in the tuner itself. My K3 can almost 
match on open antenna connection. If I were to transmit, guess 
where all the power would go.


73 Bill AE6JV

On 11/14/15 at 2:34 PM, j...@audiosystemsgroup.com (Jim Brown) wrote:


On Sat,11/14/2015 1:07 PM, Byron Peebles wrote:
Once I tuned I was good for only about 2KHz.  Any thoughts? 
Antenna has been fine everywhere else.


What's the antenna? From the symptom, I suspect it's nowhere 
near resonance on 12m, and the KAT500 is jumping through hoops 
to get power into the feedline. And, if the antenna is a poor 
match to the feedline (which is why it would need a lot of 
tuning), the loss in the feedline is likely to be high.


---
Bill Frantz| Concurrency is hard. 12 out  | Periwinkle
(408)356-8506  | 10 programmers get it wrong. | 16345 
Englewood Ave
www.pwpconsult.com |- Jeff Frantz | Los Gatos, 
CA 95032


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Re: [Elecraft] KAT500 and KAT500 Utility Question

[Wes (N7WS)]

I don't believe that it has anything to do with whether or not a match can be 
reached.  Some SWRs are simply too difficult to measure accurately, even with an 
error-corrected network analyzer.  For near ideal reactances or very high or 
very low SWR, reflection measurements are inappropriate.  In other words, if the 
impedance is on or near the periphery of a Smith Chart (rho ~ 1) find another 
method.


On 11/4/2015 1:59 PM, Phil Hystad wrote:

[snip]

So, I am assuming that unless the KAT500 reaches a tuned SWR value under 1.5:1 
(or, whatever threshold I set), the BYPASS SWR is totally meaningless.

73, phil, K7PEH




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Re: [Elecraft] KAT500 and KAT500 Utility Question

[Wes (N7WS)]

Some of what you say is true, but has nothing to do with the problem.

Soapbox comment: Personally, I would (and do) rather use Heliax before I would 
ever use ladder line.



On 11/4/2015 2:21 PM, Ken wrote:
The results almost totally depend on the length of the ladder line. At certain 
lengths, it will act as an impedance transformer and could load your 80m 
dipole quite well.  An 80m dipole on 160 will have a low impedance at the feed 
point.   A quarter wave of ladder line will transform that impedance to a 
higher impedance. A half wave of ladder line will give the same impedance (no 
transformer effect.)


If you have something near a half wave of ladder line, the 4:1 balun is 
totally wrong since it will transform a low impedance to one 4x lower!


Try it with a 1: balun and see if the SWR improves or not.

As for actual, honest SWR readings, I assume that most meters are unreliable 
in the actual readings when the SWR gets high, especially 10:1 and above.   
They are really built to operate in the 50 ohm range, not 500 or 1000.


BTW, IMO the KAT500 is one of the best tuners I've used and I've been building 
or using them for over 50 years.


Ken WA8JXM



On 11/4/15 3:59 PM, Phil Hystad wrote:
First, this is a curiosity question about KAT500 utility only.  I don’t 
intend to use my antenna on 160 meters.


I use the KAT500 with my 80-meter dipole fed by ladder line and a 4:1 Balun 
to Coax for last 20 feet.  This antenna works excellently in concert with the 
KAT500 for 80, 40, and 30 meter bands.  I don’t use it with other bands.


This weekend, I was curious as to how close (or far) the KAT500 could bring 
the antenna in for the 160 meter band.  I knew that it would not work though 
I was wondering how bad it would be.


So, as I expected, the tuning never closed in on a descent SWR, the best I 
saw on one test only was SWR about 49:1 as reported by the KAT500 utility.  
But, the BYPASS SWR reported was about 11:1.


Further tests showed varying bad reports of incomplete tuned SWR while also 
showing a much lower BYPASS SWR (under 13:1). According to my own tests of 
the impedance for the antenna on 160 meters, the BYPASS SWR is bogus.


So, I am assuming that unless the KAT500 reaches a tuned SWR value under 
1.5:1 (or, whatever threshold I set), the BYPASS SWR is totally meaningless.


73, phil, K7PEH




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Re: [Elecraft] KAT500 and KAT500 Utility Question

[Ken]

The results almost totally depend on the length of the ladder line.   At 
certain lengths, it will act as an impedance transformer and could load 
your 80m dipole quite well.  An 80m dipole on 160 will have a low 
impedance at the feed point.   A quarter wave of ladder line will 
transform that impedance to a higher impedance. A half wave of ladder 
line will give the same impedance (no transformer effect.)


If you have something near a half wave of ladder line, the 4:1 balun is 
totally wrong since it will transform a low impedance to one 4x lower!


Try it with a 1: balun and see if the SWR improves or not.

As for actual, honest SWR readings, I assume that most meters are 
unreliable in the actual readings when the SWR gets high, especially 
10:1 and above.   They are really built to operate in the 50 ohm range, 
not 500 or 1000.


BTW, IMO the KAT500 is one of the best tuners I've used and I've been 
building or using them for over 50 years.


Ken WA8JXM



On 11/4/15 3:59 PM, Phil Hystad wrote:

First, this is a curiosity question about KAT500 utility only.  I don’t intend 
to use my antenna on 160 meters.

I use the KAT500 with my 80-meter dipole fed by ladder line and a 4:1 Balun to 
Coax for last 20 feet.  This antenna works excellently in concert with the 
KAT500 for 80, 40, and 30 meter bands.  I don’t use it with other bands.

This weekend, I was curious as to how close (or far) the KAT500 could bring the 
antenna in for the 160 meter band.  I knew that it would not work though I was 
wondering how bad it would be.

So, as I expected, the tuning never closed in on a descent SWR, the best I saw 
on one test only was SWR about 49:1 as reported by the KAT500 utility.  But, 
the BYPASS SWR reported was about 11:1.

Further tests showed varying bad reports of incomplete tuned SWR while also 
showing a much lower BYPASS SWR (under 13:1).  According to my own tests of the 
impedance for the antenna on 160 meters, the BYPASS SWR is bogus.

So, I am assuming that unless the KAT500 reaches a tuned SWR value under 1.5:1 
(or, whatever threshold I set), the BYPASS SWR is totally meaningless.

73, phil, K7PEH




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[Elecraft] KAT500 and KAT500 Utility Question

[Phil Hystad]

First, this is a curiosity question about KAT500 utility only.  I don’t intend 
to use my antenna on 160 meters.

I use the KAT500 with my 80-meter dipole fed by ladder line and a 4:1 Balun to 
Coax for last 20 feet.  This antenna works excellently in concert with the 
KAT500 for 80, 40, and 30 meter bands.  I don’t use it with other bands.

This weekend, I was curious as to how close (or far) the KAT500 could bring the 
antenna in for the 160 meter band.  I knew that it would not work though I was 
wondering how bad it would be.

So, as I expected, the tuning never closed in on a descent SWR, the best I saw 
on one test only was SWR about 49:1 as reported by the KAT500 utility.  But, 
the BYPASS SWR reported was about 11:1.

Further tests showed varying bad reports of incomplete tuned SWR while also 
showing a much lower BYPASS SWR (under 13:1).  According to my own tests of the 
impedance for the antenna on 160 meters, the BYPASS SWR is bogus.

So, I am assuming that unless the KAT500 reaches a tuned SWR value under 1.5:1 
(or, whatever threshold I set), the BYPASS SWR is totally meaningless.

73, phil, K7PEH


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Re: [Elecraft] KAT500 and KAT500 Utility Question

[Fred Jensen]

On 11/4/2015 12:59 PM, Phil Hystad wrote:


I use the KAT500 with my 80-meter dipole fed by ladder line and a 4:1
Balun to Coax for last 20 feet.  This antenna works excellently in
concert with the KAT500 for 80, 40, and 30 meter bands.  I don’t use
it with other bands.


Feed point Z's:
1.9: 5.6-j1149
3.9: 78+j2
7.2: 2703+j2201

Your ladder line will transform these impedances to something else ... 
unless it happens to be a multiple of a half-wave at one of those 
frequencies.  Tell me how long it is and we can calculate what it looks 
like on the high side of your 4:1 transformer.  I don't recommend 
holding your breath that it will be good on all three bands though.


This weekend, I was curious as to how close (or far) the KAT500 could
bring the antenna in for the 160 meter band.  I knew that it would
not work though I was wondering how bad it would be.


The radiation resistance on 160 will be very low and the 4:1 transformer 
will divide it by 4, meaning just a tad above 1 ohm.  It is also very 
reactive.


If you really want to use it on 160, try shorting the ladder line at the 
feed end, remove the transformer, and connect the shorted end to the 
coax through a variable cap.  Run 1 or 2 wires on the ground from the 
coax shield and see if you can feed it as a Marconi-T.


If your ladder line is 60 ft long, feed Z at the shorted end of the 
ladder line will be about 110+j1400 and an Xc of 1400 ohms will probably 
work fine for the KAT500.


So, as I expected, the tuning never closed in on a descent SWR, the
best I saw on one test only was SWR about 49:1 as reported by the
KAT500 utility.  But, the BYPASS SWR reported was about 11:1.


SWR meters, which usually measure VSWR are fairly unreliable at high 
values of mismatch.


73,

Fred K6DGW
- Northern California Contest Club
- CU in the Cal QSO Party 1-2 Oct 2016
- www.cqp.org

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Re: [Elecraft] KAT500 and KAT500 Utility Question

[Wes (N7WS)]

Guys, read what he wrote, not what you think he wrote.

He had a question about the operation of the metering in the KAT500, he wasn't 
looking for advice on antenna design or on the use of ladder line.


If he wants that he can read my paper here: 
http://k6mhe.com/n7ws/Ladder_Line.pdf


11/4/2015 3:37 PM, Fred Jensen wrote:

On 11/4/2015 12:59 PM, Phil Hystad wrote:


I use the KAT500 with my 80-meter dipole fed by ladder line and a 4:1
Balun to Coax for last 20 feet.  This antenna works excellently in
concert with the KAT500 for 80, 40, and 30 meter bands.  I don’t use
it with other bands.


Feed point Z's:
1.9: 5.6-j1149
3.9: 78+j2
7.2: 2703+j2201

Your ladder line will transform these impedances to something else ... unless 
it happens to be a multiple of a half-wave at one of those frequencies.  Tell 
me how long it is and we can calculate what it looks like on the high side of 
your 4:1 transformer.  I don't recommend holding your breath that it will be 
good on all three bands though.


This weekend, I was curious as to how close (or far) the KAT500 could
bring the antenna in for the 160 meter band.  I knew that it would
not work though I was wondering how bad it would be.


The radiation resistance on 160 will be very low and the 4:1 transformer will 
divide it by 4, meaning just a tad above 1 ohm. It is also very reactive.


If you really want to use it on 160, try shorting the ladder line at the feed 
end, remove the transformer, and connect the shorted end to the coax through a 
variable cap.  Run 1 or 2 wires on the ground from the coax shield and see if 
you can feed it as a Marconi-T.


If your ladder line is 60 ft long, feed Z at the shorted end of the ladder 
line will be about 110+j1400 and an Xc of 1400 ohms will probably work fine 
for the KAT500.


So, as I expected, the tuning never closed in on a descent SWR, the
best I saw on one test only was SWR about 49:1 as reported by the
KAT500 utility.  But, the BYPASS SWR reported was about 11:1.


SWR meters, which usually measure VSWR are fairly unreliable at high values of 
mismatch.


73,

Fred K6DGW
- Northern California Contest Club
- CU in the Cal QSO Party 1-2 Oct 2016
- www.cqp.org

Message delivered to w...@triconet.org


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Re: [Elecraft] KAT500 and KAT500 Utility Question

[Jim Brown]

On Wed,11/4/2015 3:04 PM, Wes (N7WS) wrote:
If he wants that he can read my paper here: 
http://k6mhe.com/n7ws/Ladder_Line.pdf


By all means DO read and STUDY it -- it's a GREAT piece of work.

73, Jim K9YC
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Re: [Elecraft] KAT500 and KAT500 Utility Question

[Phil Hystad]

Wes…

Thanks, you are exactly right.  My curiosity is about what the KAT500 was doing 
and the value of the BYPASS SWR versus the values I saw of the Tuned (or, not 
tuned) SWR.  

Dick’s answer was right on and satisfied all my curiosity needs.

Though thanks to all that took the time to write something down and Wes, I will 
read your paper at your link.  In fact, just downloaded it.

73, phil, K7PEH



> On Nov 4, 2015, at 3:04 PM, Wes (N7WS)  wrote:
> 
> Guys, read what he wrote, not what you think he wrote.
> 
> He had a question about the operation of the metering in the KAT500, he 
> wasn't looking for advice on antenna design or on the use of ladder line.
> 
> If he wants that he can read my paper here: 
> http://k6mhe.com/n7ws/Ladder_Line.pdf
> 
> 
> 11/4/2015 3:37 PM, Fred Jensen wrote:
>> On 11/4/2015 12:59 PM, Phil Hystad wrote:
>> 
>>> I use the KAT500 with my 80-meter dipole fed by ladder line and a 4:1
>>> Balun to Coax for last 20 feet.  This antenna works excellently in
>>> concert with the KAT500 for 80, 40, and 30 meter bands.  I don’t use
>>> it with other bands.
>> 
>> Feed point Z's:
>>1.9: 5.6-j1149
>>3.9: 78+j2
>>7.2: 2703+j2201
>> 
>> Your ladder line will transform these impedances to something else ... 
>> unless it happens to be a multiple of a half-wave at one of those 
>> frequencies.  Tell me how long it is and we can calculate what it looks like 
>> on the high side of your 4:1 transformer.  I don't recommend holding your 
>> breath that it will be good on all three bands though.
>>> 
>>> This weekend, I was curious as to how close (or far) the KAT500 could
>>> bring the antenna in for the 160 meter band.  I knew that it would
>>> not work though I was wondering how bad it would be.
>> 
>> The radiation resistance on 160 will be very low and the 4:1 transformer 
>> will divide it by 4, meaning just a tad above 1 ohm. It is also very 
>> reactive.
>> 
>> If you really want to use it on 160, try shorting the ladder line at the 
>> feed end, remove the transformer, and connect the shorted end to the coax 
>> through a variable cap.  Run 1 or 2 wires on the ground from the coax shield 
>> and see if you can feed it as a Marconi-T.
>> 
>> If your ladder line is 60 ft long, feed Z at the shorted end of the ladder 
>> line will be about 110+j1400 and an Xc of 1400 ohms will probably work fine 
>> for the KAT500.
>>> 
>>> So, as I expected, the tuning never closed in on a descent SWR, the
>>> best I saw on one test only was SWR about 49:1 as reported by the
>>> KAT500 utility.  But, the BYPASS SWR reported was about 11:1.
>> 
>> SWR meters, which usually measure VSWR are fairly unreliable at high values 
>> of mismatch.
>> 
>> 73,
>> 
>> Fred K6DGW
>> - Northern California Contest Club
>> - CU in the Cal QSO Party 1-2 Oct 2016
>> - www.cqp.org
>> 
>> Message delivered to w...@triconet.org
> 
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[Elecraft] KAT500 - Utility not working - FINAL REPORT

[Bill Wiehe via Elecraft]

Some may recall I had a issue with my KAT500 not connecting to the computer 
therefore not allowing me to use the KAT Utility. After checking com ports and 
ever purchasing a new KXUSB cable from Elecraft, I sent the unit off to the 
mother ship for a look-see.  Turns out we lost transistors Q1 and Q2. They were 
replaced and all is well once again.
I do not know how or why they were "blown" but we happy all is once again 
working. Thanks to the Elecraft Team and Service Tech Cory for the quick turn 
around.
Bill-W0BBI
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Re: [Elecraft] [KAT500] PC Data to Amp Control?

[Jack Brindle]

See below for a better understanding of how the KPA500 works when set for RADIO 
= SERIAL mode.

> On Oct 10, 2015, at 3:03 PM, Cliff Frescura <c...@cfcorp.com> wrote:
> 
> Update:
> 
> Bottom line is that the sniffer approach works.
> 
> Details:
> 1.  Ideally, the sniffer should *not* be attached to the radio (Kenwood) 
> RS-232 line, but to the secondary RS-232 line (Configured by DXLabs 
> software).  It appears that KPA500 only responds to commands from DXLabs and 
> not the radio (I suspect this is because polling is being used by DXLabs and 
> not the Kenwood Auto Info command) - yes, I did try a pin 2/3 swap on the 
> sniffer tap point.  This also has implications when the KPA500 is turned on 
> after frequency changes because it will know the current frequency (not fatal 
> since it can RF Sense switch anyway).

The KPA is designed to either connect directly to the Kenwood radio or with a 
“Y” adapter it can eavesdrop on the computer-radio conversation. When 
eavesdropping, it is the computer (or other controlling device) that determines 
the polling rate. When that devices issues a frequency request the radio 
responds and the KPA500 will receive the data and respond accordingly.

When the KPA is set for RADIO=SERIAL, the SER POLL setting becomes important. 
When OFF, the KPA does exactly as described above - it only listens for data 
from the radio. If you directly connect the KPA to the radio (no Y cable into 
the KPA), then set the SER POLL item to ON. This will cause the KPA to 
periodically poll the radio for frequency. The poll rate is once per second, 
and the KPA issues the following commands for each poll: “FA;FB;FT;”. Again, 
note that this _only_ works when the KPA is allowed to talk to the radio 
directly.
 
> 2. The KPA500 seems to "look for" radio RS-232 data about every 5 seconds 
> because that is the lag from the Kenwood changing frequency to the KPA 
> changing bands.  A bit too long for me but tolerable.

The KPA500 is constantly available for data coming into its serial ports, and 
reacts to that data within 1 millisecond of the receipt of the terminating 
semicolon. If you are seeing it react every five seconds, that means the radio 
is only sending the information every 5 seconds. You should determine why that 
is happening, most likely because the commanding device is only polling with 
that period.

> Next Steps:
> 1. Move the sniffer to the KAT500 RS-232 line where DXLabs will send data via 
> the Secondary COM Port (K3 native format) to the KAT500 when clicking on a 
> spot or moving the Kenwood VFO.  Alas, I have the USB cable for the KAT500, 
> so I need to get the RS-232 cable.

If the DXLabs can send the proper format for the KAT500, then this might work. 
There are very few devices that do send native KAT500 or KPA500 commands, so 
you might want to look at another method unless that device happens to be on 
the short list. I have no info about the DXLabs device, but tend to doubt it 
handles the format. Also realize that the KPA500 will change bands immediately 
on detecting transmitted RF at its input on a band other than the one it last 
used, so this should not be as critical as you might think.

The KAT500 does not listen to the K3’s serial port for its frequency 
information, but rather to the K3’s Auxbus channel. It also does not understand 
the K3 responses, so piping K3 - formatted serial data into the KAT500 (or the 
KPA500 for that matter) will pretty much do nothing.

If no computer is involved in the station setup, it is quite possible that the 
you may want to have the DXLabs device eavesdrop on the KPA-computer 
communications. In either case, also realize that nothing is actually sending 
the BCD data for the KAT500 or KPA500 to respond to. Neither of these devices 
will drive the BCD signals, they only listen to them. That means that both must 
respond to RF data to determine band changes, unless you find some way to tell 
both (independently) the new band. Perhaps the DXLabs box can perform that 
function. It is possible for a KRC-2 to do this function, although I have never 
tried it.

Good luck and 73!

Jack Brindle, W6FB
Elecraft Engineering

> 
> 73,
> 
> Cliff K3LL/6
> 
> 
> 
> -Original Message-
> From: Cliff Frescura [mailto:c...@cfcorp.com] 
> Sent: Friday, October 09, 2015 2:10 PM
> To: 'Jack Brindle'
> Cc: 'Elecraft Reflector'
> Subject: RE: [Elecraft] [KAT500] PC Data to Amp Control?
> 
> Thanks Jack and others that replied off list.
> 
> I'm going to go with the y cable sniffer approach.  Since I don't use the amp 
> all the time, I'd rather not have to power it up just so the KAT500 can 
> receive commands from the Kenwood.
> 
> 73,
> 
> Cliff K3ll
> 
> -Original Message-
> From: Jack Brindle [mailto:jackbrin...@me.com]
> Sent: Friday, October 09, 2015 12:

Re: [Elecraft] [KAT500] PC Data to Amp Control?

[Cliff Frescura]

Update:

Bottom line is that the sniffer approach works.

Details:
1.  Ideally, the sniffer should *not* be attached to the radio (Kenwood) RS-232 
line, but to the secondary RS-232 line (Configured by DXLabs software).  It 
appears that KPA500 only responds to commands from DXLabs and not the radio (I 
suspect this is because polling is being used by DXLabs and not the Kenwood 
Auto Info command) - yes, I did try a pin 2/3 swap on the sniffer tap point.  
This also has implications when the KPA500 is turned on after frequency changes 
because it will know the current frequency (not fatal since it can RF Sense 
switch anyway).

2. The KPA500 seems to "look for" radio RS-232 data about every 5 seconds 
because that is the lag from the Kenwood changing frequency to the KPA changing 
bands.  A bit too long for me but tolerable.

Next Steps:
1. Move the sniffer to the KAT500 RS-232 line where DXLabs will send data via 
the Secondary COM Port (K3 native format) to the KAT500 when clicking on a spot 
or moving the Kenwood VFO.  Alas, I have the USB cable for the KAT500, so I 
need to get the RS-232 cable.

73,

Cliff K3LL/6



-Original Message-
From: Cliff Frescura [mailto:c...@cfcorp.com] 
Sent: Friday, October 09, 2015 2:10 PM
To: 'Jack Brindle'
Cc: 'Elecraft Reflector'
Subject: RE: [Elecraft] [KAT500] PC Data to Amp Control?

Thanks Jack and others that replied off list.

I'm going to go with the y cable sniffer approach.  Since I don't use the amp 
all the time, I'd rather not have to power it up just so the KAT500 can receive 
commands from the Kenwood.

73,

Cliff K3ll

-Original Message-
From: Jack Brindle [mailto:jackbrin...@me.com]
Sent: Friday, October 09, 2015 12:55 PM
To: Cliff Frescura
Cc: Elecraft Reflector
Subject: Re: [Elecraft] [KAT500] PC Data to Amp Control?

Or connect the Kenwood’s serial port to the KPA500’s Radio port, then set the 
RADIO = SERIAL in the KPA.
Follow the directions in the KPA manual. This is exactly what that serial port 
is designed to do. Make sure you use the RADIO port, not the PC port for this.

If you connect the serial port from the TS-940 to a computer, just make a Y 
cable to allow the KPA to see the data going from the Radio to the computer. 
And make sure the TX line is not connected to the KPA.

Also note that the KPA will not interpret the data destined for the KAT500. It 
is specifically look for transceiver data on the Radio port, or KPA-specific 
commands on the PC port.

- Jack, W6FB


> On Oct 9, 2015, at 11:54 AM, Cliff Frescura <c...@cfcorp.com> wrote:
> 
> Thanks Dick,
> 
> Looks like I could either have the KPA500 sniff the RS-232 line into 
> the
> KAT500 (use RXD pin only at the KPA500), or implement BAND0-3 and make 
> it minimally emulate a K3S into the KPA500.
> 
> 73,
> 
> Cliff K3LL
> 
> -Original Message-
> From: Dick Dievendorff [mailto:d...@elecraft.com]
> Sent: Friday, October 09, 2015 10:55 AM
> To: Cliff Frescura
> Cc: elecraft@mailman.qth.net
> Subject: Re: [Elecraft] [KAT500] PC Data to Amp Control?
> 
> The KAT500 can read, but not pull down the 4 band change lines. 
> 
> Dick, K6KR
> 
> Sent from my iPhone
> 
>> On Oct 8, 2015, at 21:07, Cliff Frescura <c...@cfcorp.com> wrote:
>> 
>> Hi,
>> 
>> 
>> 
>> If I change bands on the KAT500 via the PC Data port, it appears that 
>> the new band data is not sent to the Amp Control connector.  Is this 
>> expected behavior? (hoping no).
>> 
>> 
>> 
>> For reference, my setup is:
>> 
>> 
>> 
>> Kenwood TS-940
>> 
>> DXLabs Logging program
>> 
>> KAT500
>> 
>> KPA500
>> 
>> 
>> 
>> The 940 is connected to the computer and controlled by DXLabs.  
>> DXLabs is configured to send commands to the KAT500 (follow the 940).  
>> This all works fine.  I'm now trying to have the KPA500 follow the
>> KAT500 via the Amp Control connector on the KAT500 (with E850463 cable).
>> 
>> 
>> 
>> 73,
>> 
>> 
>> 
>> Cliff K3LL
>> 
>> __
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>> d...@elecraft.com
> 
> 
> 
> 
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> This lis

Re: [Elecraft] [KAT500] PC Data to Amp Control?

[Cliff Frescura]

Thanks Jack and others that replied off list.

I'm going to go with the y cable sniffer approach.  Since I don't use the amp 
all the time, I'd rather not have to power it up just so the KAT500 can receive 
commands from the Kenwood.

73,

Cliff K3ll

-Original Message-
From: Jack Brindle [mailto:jackbrin...@me.com] 
Sent: Friday, October 09, 2015 12:55 PM
To: Cliff Frescura
Cc: Elecraft Reflector
Subject: Re: [Elecraft] [KAT500] PC Data to Amp Control?

Or connect the Kenwood’s serial port to the KPA500’s Radio port, then set the 
RADIO = SERIAL in the KPA.
Follow the directions in the KPA manual. This is exactly what that serial port 
is designed to do. Make sure you use the RADIO port, not the PC port for this.

If you connect the serial port from the TS-940 to a computer, just make a Y 
cable to allow the KPA to see the data going from the Radio to the computer. 
And make sure the TX line is not connected to the KPA.

Also note that the KPA will not interpret the data destined for the KAT500. It 
is specifically look for transceiver data on the Radio port, or KPA-specific 
commands on the PC port.

- Jack, W6FB


> On Oct 9, 2015, at 11:54 AM, Cliff Frescura <c...@cfcorp.com> wrote:
> 
> Thanks Dick,
> 
> Looks like I could either have the KPA500 sniff the RS-232 line into 
> the
> KAT500 (use RXD pin only at the KPA500), or implement BAND0-3 and make 
> it minimally emulate a K3S into the KPA500.
> 
> 73,
> 
> Cliff K3LL
> 
> -Original Message-
> From: Dick Dievendorff [mailto:d...@elecraft.com]
> Sent: Friday, October 09, 2015 10:55 AM
> To: Cliff Frescura
> Cc: elecraft@mailman.qth.net
> Subject: Re: [Elecraft] [KAT500] PC Data to Amp Control?
> 
> The KAT500 can read, but not pull down the 4 band change lines. 
> 
> Dick, K6KR
> 
> Sent from my iPhone
> 
>> On Oct 8, 2015, at 21:07, Cliff Frescura <c...@cfcorp.com> wrote:
>> 
>> Hi,
>> 
>> 
>> 
>> If I change bands on the KAT500 via the PC Data port, it appears that 
>> the new band data is not sent to the Amp Control connector.  Is this 
>> expected behavior? (hoping no).
>> 
>> 
>> 
>> For reference, my setup is:
>> 
>> 
>> 
>> Kenwood TS-940
>> 
>> DXLabs Logging program
>> 
>> KAT500
>> 
>> KPA500
>> 
>> 
>> 
>> The 940 is connected to the computer and controlled by DXLabs.  
>> DXLabs is configured to send commands to the KAT500 (follow the 940).  
>> This all works fine.  I'm now trying to have the KPA500 follow the 
>> KAT500 via the Amp Control connector on the KAT500 (with E850463 cable).
>> 
>> 
>> 
>> 73,
>> 
>> 
>> 
>> Cliff K3LL
>> 
>> __
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>> This list hosted by: http://www.qsl.net Please help support this 
>> email
>> list: http://www.qsl.net/donate.html Message delivered to 
>> d...@elecraft.com
> 
> 
> 
> 
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Re: [Elecraft] [KAT500] PC Data to Amp Control?

[Jack Brindle]

Or connect the Kenwood’s serial port to the KPA500’s Radio port, then set the 
RADIO = SERIAL in the KPA.
Follow the directions in the KPA manual. This is exactly what that serial port 
is designed to do. Make sure you
use the RADIO port, not the PC port for this.

If you connect the serial port from the TS-940 to a computer, just make a Y 
cable to allow the KPA to see the data
going from the Radio to the computer. And make sure the TX line is not 
connected to the KPA.

Also note that the KPA will not interpret the data destined for the KAT500. It 
is specifically look for transceiver
data on the Radio port, or KPA-specific commands on the PC port.

- Jack, W6FB


> On Oct 9, 2015, at 11:54 AM, Cliff Frescura <c...@cfcorp.com> wrote:
> 
> Thanks Dick,
> 
> Looks like I could either have the KPA500 sniff the RS-232 line into the
> KAT500 (use RXD pin only at the KPA500), or implement BAND0-3 and make it
> minimally emulate a K3S into the KPA500.
> 
> 73,
> 
> Cliff K3LL
> 
> -Original Message-
> From: Dick Dievendorff [mailto:d...@elecraft.com] 
> Sent: Friday, October 09, 2015 10:55 AM
> To: Cliff Frescura
> Cc: elecraft@mailman.qth.net
> Subject: Re: [Elecraft] [KAT500] PC Data to Amp Control?
> 
> The KAT500 can read, but not pull down the 4 band change lines. 
> 
> Dick, K6KR
> 
> Sent from my iPhone
> 
>> On Oct 8, 2015, at 21:07, Cliff Frescura <c...@cfcorp.com> wrote:
>> 
>> Hi,
>> 
>> 
>> 
>> If I change bands on the KAT500 via the PC Data port, it appears that 
>> the new band data is not sent to the Amp Control connector.  Is this 
>> expected behavior? (hoping no).
>> 
>> 
>> 
>> For reference, my setup is:
>> 
>> 
>> 
>> Kenwood TS-940
>> 
>> DXLabs Logging program
>> 
>> KAT500
>> 
>> KPA500
>> 
>> 
>> 
>> The 940 is connected to the computer and controlled by DXLabs.  DXLabs 
>> is configured to send commands to the KAT500 (follow the 940).  This 
>> all works fine.  I'm now trying to have the KPA500 follow the KAT500 
>> via the Amp Control connector on the KAT500 (with E850463 cable).
>> 
>> 
>> 
>> 73,
>> 
>> 
>> 
>> Cliff K3LL
>> 
>> __
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>> d...@elecraft.com
> 
> 
> 
> 
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[Elecraft] [KAT500] PC Data to Amp Control?

[Cliff Frescura]

Hi,

 

If I change bands on the KAT500 via the PC Data port, it appears that the
new band data is not sent to the Amp Control connector.  Is this expected
behavior? (hoping no).

 

For reference, my setup is:

 

Kenwood TS-940

DXLabs Logging program

KAT500

KPA500

 

The 940 is connected to the computer and controlled by DXLabs.  DXLabs is
configured to send commands to the KAT500 (follow the 940).  This all works
fine.  I'm now trying to have the KPA500 follow the KAT500 via the Amp
Control connector on the KAT500 (with E850463 cable).

 

73,

 

Cliff K3LL

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Re: [Elecraft] [KAT500] PC Data to Amp Control?

[Dick Dievendorff]

The KAT500 can read, but not pull down the 4 band change lines. 

Dick, K6KR

Sent from my iPhone

> On Oct 8, 2015, at 21:07, Cliff Frescura  wrote:
> 
> Hi,
> 
> 
> 
> If I change bands on the KAT500 via the PC Data port, it appears that the
> new band data is not sent to the Amp Control connector.  Is this expected
> behavior? (hoping no).
> 
> 
> 
> For reference, my setup is:
> 
> 
> 
> Kenwood TS-940
> 
> DXLabs Logging program
> 
> KAT500
> 
> KPA500
> 
> 
> 
> The 940 is connected to the computer and controlled by DXLabs.  DXLabs is
> configured to send commands to the KAT500 (follow the 940).  This all works
> fine.  I'm now trying to have the KPA500 follow the KAT500 via the Amp
> Control connector on the KAT500 (with E850463 cable).
> 
> 
> 
> 73,
> 
> 
> 
> Cliff K3LL
> 
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Re: [Elecraft] [KAT500] PC Data to Amp Control?

[Cliff Frescura]

Thanks Dick,

Looks like I could either have the KPA500 sniff the RS-232 line into the
KAT500 (use RXD pin only at the KPA500), or implement BAND0-3 and make it
minimally emulate a K3S into the KPA500.

73,

Cliff K3LL

-Original Message-
From: Dick Dievendorff [mailto:d...@elecraft.com] 
Sent: Friday, October 09, 2015 10:55 AM
To: Cliff Frescura
Cc: elecraft@mailman.qth.net
Subject: Re: [Elecraft] [KAT500] PC Data to Amp Control?

The KAT500 can read, but not pull down the 4 band change lines. 

Dick, K6KR

Sent from my iPhone

> On Oct 8, 2015, at 21:07, Cliff Frescura <c...@cfcorp.com> wrote:
> 
> Hi,
> 
> 
> 
> If I change bands on the KAT500 via the PC Data port, it appears that 
> the new band data is not sent to the Amp Control connector.  Is this 
> expected behavior? (hoping no).
> 
> 
> 
> For reference, my setup is:
> 
> 
> 
> Kenwood TS-940
> 
> DXLabs Logging program
> 
> KAT500
> 
> KPA500
> 
> 
> 
> The 940 is connected to the computer and controlled by DXLabs.  DXLabs 
> is configured to send commands to the KAT500 (follow the 940).  This 
> all works fine.  I'm now trying to have the KPA500 follow the KAT500 
> via the Amp Control connector on the KAT500 (with E850463 cable).
> 
> 
> 
> 73,
> 
> 
> 
> Cliff K3LL
> 
> __
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[Elecraft] KAT500 help

[Bob KD7YZ]

I have a K3 and the KAT500.

Today I realized that when I switched from, say, 10m to 6m that the ANT
stayed with ANT-1. In fact, it stays on whatever I manually move it to.

I also have ANT3 which is a cantenna dummy load kludge, fwiw.

Using the KAT500 Utility I verified that 6m has "Enabled" both #2 and
#3. 6 has #2 "Preferred" .

10m, and all HF, has #1 and #3 "Enabled" and #1 Preferred.

Inside the KAT500 utility I can switch Auto, manual and bypass.It seems
I have full control of the KAT500 with the utility.

I removed DC power from both K3 as well as KAT500 after checking.

Summary is no matter what band I select on the K3, the KAT500 doe not
follow.

What can I check, here, to see why the antenna tuner no longer
automatically switches when I change bands?

-- 
73,
Bob KD7YZ
www.qrz.com/db/kd7yz
AmSat LM#901
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Re: [Elecraft] KAT500 help

[Bob KD7YZ]

On 04-Oct-15 1611, Bob KD7YZ wrote:

> What can I check, here, to see why the antenna tuner no longer
> automatically switches when I change bands?
> 

got the answer direct email ... seems due to the extreme rats-nest of
cable(s) to 3 XVxx transverters; EME sequencers, KAT500, PC cables and
stuff passing back and forth, that I overlooked a slightly removed cable.

-- 
73,
Bob KD7YZ
www.qrz.com/db/kd7yz
AmSat LM#901
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Re: [Elecraft] KAT500 Fault

[Dick Dievendorff]

Sounds like the amplifier key line is not connected thru the KAT500.  The ATU 
must be able to break the amp key line during tuning and all other ATU relay 
transitions. 

Dick, K6KR

Sent from my iPhone

> On Oct 2, 2015, at 04:47, dave_w0ru  wrote:
> 
> Fred,
> I am now trying the KAT500 output going to a dummy load. When the K3 is set
> at about 22 watts out, the KPA500 shows 440 Watts out. When I use the Tune
> feature on the K3 with Manual Tune feature on the KAT500, there is no fault.
> However, when I send with the K3 keyer and with Manual Tune on the KAT500, 
> I get a fault on the KAT500. Using the KAT500 utility, I find Fault Code 03
> - VFWD above relay hotswitch limit - VFWD 1551 VRFL 0 SWR 1.00 SWRB 1.00. Is
> the moral of the story to use the K3 Tune control, not the K3 keyer?
> 
> 73 de Dave w0ru
> 
> 
> 
> --
> View this message in context: 
> http://elecraft.365791.n2.nabble.com/KAT500-Fault-tp7608563p7608616.html
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Re: [Elecraft] KAT500 Fault

[dave_w0ru]

I finally found out the answer. In checking the AuxBus cables, I found a
cable connecting the K3 Key Out to the KPA500 PA Key. Removing this cable
made the fault go away. Perhaps I had followed the Figure 3 on page 23 of
the KPA500 manual at some point. Anyway there is a lot of cabling back
there. 

73,
Dave w0ru




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Re: [Elecraft] KAT500 Fault

[Ron D'Eau Claire]

Right! You want only ONE key line. Note that in Figure 3 (pg 13) the
KPAK3AUX cable contains a key line inside of it. Figure 4 (page 14) show an
external key line cable between the K3 and KPA500 so you can break into it
to control some external gear such as a Stepp-IR antenna controller, but
also shows the "key line interrupter" between the K3 and the KPAK3AUX cable.
The interrupter opens the key line inside the KPAK3AUX cable so it's no
longer active.

Every time I have to recable my K3/P3/KPA500/KAT500 setup - which is almost
daily - I think to myself "Isn't wireless fun?"
 
Ron AC7AC

-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of dave_w0ru
Sent: Friday, October 2, 2015 1:05 PM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] KAT500 Fault

I finally found out the answer. In checking the AuxBus cables, I found a
cable connecting the K3 Key Out to the KPA500 PA Key. Removing this cable
made the fault go away. Perhaps I had followed the Figure 3 on page 23 of
the KPA500 manual at some point. Anyway there is a lot of cabling back
there. 

73,
Dave w0ru




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Re: [Elecraft] KAT500 Fault

[dave_w0ru]

dave_w0ru wrote
> With the 
*
> KAT500
*
>  in Standby, I can tune with the KAT500 just fine.

That should read:

With the *KPA500* in Standby, 

Dave w0ru



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Re: [Elecraft] KAT500 Fault

[Cady, Fred]

Hi Dave, 
I don't have the full context of your note but here is some information that 
may help:

3.9.5   Tuner Fault Conditions
The FAULT LED being lit does not mean there is an equipment failure to cause 
you concern.  Rather, it indicates a condition that you should correct.
A fault will occur, and the FAULT LED will light under the following conditions:
•   If the RF drive power exceeds 110 watts during a tune operation.  This 
can happen if your amplifier outputs more than 110 watts and the KAT500 does 
not interrupt the keying line while it is tuning.  You should be using a K3–KPA 
Cable as shown in Figure 3 4 or a separate keying line cable as shown in Figure 
3 3.  Note that the KAT500 will not open the keying line if the power input to 
the tuner is greater than 30 watts unless you have configured it as shown in 
Section 3.8.
•   The VSWR of the antenna is higher than the configured Amplifier Key 
Interrupt VSWR Threshold and the red FAULT LED illuminates.  If this occurs, 
the amplifier’s keying line is interrupted.
This fault may occur frequently while the tuner is tuning and will be cleared 
automatically when the tuner is finished and a transmission occurs where the 
VSWR is about 10% lower than the threshold.  If the fault persists, press any 
KAT500 key, change bands, antenna or KAT500 mode, or fix the antenna problem 
and transmit again.  Because this fault may occur frequently, and normally, 
when tuning, it is not written into the fault log.
•   The impedance is outside the normal tuning range (see Table 3.1) but 
the KAT500 is able to match it.  In this case, you should reduce the power as 
needed to protect the KAT500.
To reset a fault, tap the TUNE switch or switch the power off and then on by 
holding the MODE switch. 

73,
Fred KE7X

Author of:
"The Elecraft K3: Design, Configuration and Operation 2nd ed"
"The Portable Elecraft KX3 – Going for the Summit with the KX3 and KX3-2M/4M"
“The Elecraft KX-Line – The Complete Station”
“The Elecraft KPA500 and KAT500 – the K-Line Dream Station”
Printed, coil bound copies of these are all available at www.elecraft.com
KPA500 and KAT500 Quick Set Up Guide
http://www.ke7x.com/home/k-line-introduction-and-set-up-guide

KAT500 and KXPA500 Tuner Operation
http://www.ke7x.com/home/kat500-and-kxpa100-tuners

“The Elecraft KXPA100, PX3 and 2M/4M Transverters – Assembling the KX3-Line 
Station” available at www.lulu.com.

“The Elecraft K3S and P3 – Getting the Most out from Your High Performance 
Station”  coming very soon.
A book dedicated to the K3S upgrades for the K3 and a 3rd Edition of the K3 
book are works in progress.




From: elecraft-boun...@mailman.qth.net <elecraft-boun...@mailman.qth.net> on 
behalf of dave_w0ru <dken...@gmail.com>
Sent: Thursday, October 1, 2015 9:32 AM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] KAT500 Fault

dave_w0ru wrote
> With the
*
> KAT500
*
>  in Standby, I can tune with the KAT500 just fine.

That should read:

With the *KPA500* in Standby,

Dave w0ru



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Re: [Elecraft] KAT500 Fault

[dave_w0ru]

Fred,
I am now trying the KAT500 output going to a dummy load. When the K3 is set
at about 22 watts out, the KPA500 shows 440 Watts out. When I use the Tune
feature on the K3 with Manual Tune feature on the KAT500, there is no fault.
However, when I send with the K3 keyer and with Manual Tune on the KAT500, 
I get a fault on the KAT500. Using the KAT500 utility, I find Fault Code 03
- VFWD above relay hotswitch limit - VFWD 1551 VRFL 0 SWR 1.00 SWRB 1.00. Is
the moral of the story to use the K3 Tune control, not the K3 keyer?

73 de Dave w0ru



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[Elecraft] KAT500 Fault

[dave_w0ru]

I have the K3, KPA500 and KAT500 setup per Figure 1 on page 5 of the owner's
manual. With the KAT500 in Standby, I can tune with the KAT500 just fine.
When I try to tune with the KPA500 in Operate, I get a fault on the KAT500.
The KAT500 utility shows the maximum power set at 1500 watts. My
understanding is that the KAT500 switches the KPA500 out for the tuning and
back in when tuning is done. What is causing the fault on the KAT500?

73 de Dave w0ru



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[Elecraft] KAT500 - Utility not working - update

[Bill Wiehe]

As an update, the KAT500 is headed back to the mother ship for a check up. All 
indications now are that the problem lies internal to the tuner.Thanks to 
everyone who provided  input. Your help was very much appreciated. 73, 
Bill-W0BBI
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Re: [Elecraft] KAT500 Utility Not Working - Not Resolved

[Bill Wiehe via Elecraft]

As an up date, I ordered a new KXUSB cable but the computer still does not 
recognize the KAT500. The original 'COM PORT' that was used prior to all this 
issue is gone and I am unable to find it. I have managed to work through all 
the steps from uninstalling and reinstalling the program and utility as well 
and rebooting the computer with the cable both in and out, etc. For whatever 
reason the computer simply does not recognize the KAT500. The KAT500 keeps 
defaulting to the port occupied by the KPA500 utility. In doing so the COM PORT 
will not recognize the KAT500.   Looking for additional suggestions. Thanks in 
advance,Bill - W0BBI
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Re: [Elecraft] KAT500 Utility Not Working - Not Resolved

[Byron Peebles]

I've gone through a bit of this under Windows 10.

Open DEVICE MANAGER and the PORTS device listing.  This is in 
Settings->System->About->Device Manager.


Connect your cable to the KAT500.  You should hear a beep and see the 
device appear.  That is the COM.


The ports are 38400 and the COM might come up a 9600, so you change the 
settings to 38400.


If you computer confuses the KPA and KAT and you KNOW they are 
different, I'd suggest you add a good quality USB powered hub and 
connect through it.  I have a pretty good computer and I've had to 
attach eight external powered USB3 Hub ports to it for stability.


73, Byron

On 09/25/2015 09:09 PM, Bill Wiehe via Elecraft wrote:

As an up date, I ordered a new KXUSB cable but the computer still does not 
recognize the KAT500. The original 'COM PORT' that was used prior to all this 
issue is gone and I am unable to find it. I have managed to work through all 
the steps from uninstalling and reinstalling the program and utility as well 
and rebooting the computer with the cable both in and out, etc. For whatever 
reason the computer simply does not recognize the KAT500. The KAT500 keeps 
defaulting to the port occupied by the KPA500 utility. In doing so the COM PORT 
will not recognize the KAT500.   Looking for additional suggestions. Thanks 
in advance,Bill - W0BBI
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Re: [Elecraft] KAT500 Utility Not Working - Not Resolved

[Tom]

Hi
Google for hidden devices in windows device manager and follow the directions 
to clean up your serial ports. Once done, plug the cable into the computer and 
check which comport it is.
73 Tom
va2fsq.com

Sent from BlueMail



On Sep 25, 2015, 3:47 PM, at 3:47 PM, Byron Peebles  wrote:
>I've gone through a bit of this under Windows 10.
>
>Open DEVICE MANAGER and the PORTS device listing.  This is in 
>Settings->System->About->Device Manager.
>
>Connect your cable to the KAT500.  You should hear a beep and see the 
>device appear.  That is the COM.
>
>The ports are 38400 and the COM might come up a 9600, so you change the
>
>settings to 38400.
>
>If you computer confuses the KPA and KAT and you KNOW they are 
>different, I'd suggest you add a good quality USB powered hub and 
>connect through it.  I have a pretty good computer and I've had to 
>attach eight external powered USB3 Hub ports to it for stability.
>
>73, Byron
>
>On 09/25/2015 09:09 PM, Bill Wiehe via Elecraft wrote:
>> As an up date, I ordered a new KXUSB cable but the computer still
>does not recognize the KAT500. The original 'COM PORT' that was used
>prior to all this issue is gone and I am unable to find it. I have
>managed to work through all the steps from uninstalling and
>reinstalling the program and utility as well and rebooting the computer
>with the cable both in and out, etc. For whatever reason the computer
>simply does not recognize the KAT500. The KAT500 keeps defaulting to
>the port occupied by the KPA500 utility. In doing so the COM PORT will
>not recognize the KAT500. Â Â Looking for additional suggestions.Â
>Thanks in advance,Bill - W0BBI
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>
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Re: [Elecraft] KAT500 - Utility not working - Resolved???

[Bill Wiehe via Elecraft]

After some help hints from Dick (K6KR), Gary and the on-line trouble shoot 
guide; we were able to trace to issue down to a faulty DB9/KXUSB cable. We have 
ordered a new cable and will pass along any other learning that may occur 
concerning this issue.Thanks to all.73, Bill - W0BBI 
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[Elecraft] KAT500 - Utility not working

[Bill Wiehe via Elecraft]

I discover a problem with my KAT500 in that the Utility shows that no Software 
is loaded. It still received signals from the computer as I can control it from 
HRD but I cannot make changes via the Utility. The cable Interface Cable shows 
only "flashing red" light. To this point I have confirmed the computer com 
ports are functioning properly. The cables are all attached. I have changed the 
cable input point to confirm it is not the computer port that is the problem. I 
even tried to reload  my previously saved configuration to no avail. The 
Utility screen continues to say that no software is loaded. And yes I reloaded 
the Utility program on the computer. Any help or insight would be appreciated 
as I have never had a problem to this point. Thank you in advance.Bill - W0BBI
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Re: [Elecraft] KAT500 - Utility not working

[Gary]

Bill,
Check baud rate. Could be you are not connected to the kat500 hence no fw 
upload to your PC.
Gary 

-Original Message-
From: "Bill Wiehe via Elecraft" <elecraft@mailman.qth.net>
Sent: ‎18/‎09/‎2015 9:53 PM
To: "Elecraft Reflector" <elecraft@mailman.qth.net>
Subject: [Elecraft] KAT500 - Utility not working

I discover a problem with my KAT500 in that the Utility shows that no Software 
is loaded. It still received signals from the computer as I can control it from 
HRD but I cannot make changes via the Utility. The cable Interface Cable shows 
only "flashing red" light. To this point I have confirmed the computer com 
ports are functioning properly. The cables are all attached. I have changed the 
cable input point to confirm it is not the computer port that is the problem. I 
even tried to reload  my previously saved configuration to no avail. The 
Utility screen continues to say that no software is loaded. And yes I reloaded 
the Utility program on the computer. Any help or insight would be appreciated 
as I have never had a problem to this point. Thank you in advance.Bill - W0BBI
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Re: [Elecraft] KAT500 Utility

[Warren Merkel]

Brian,

I had this happen to me one time.I believe it was trying to find the
KAT500 on a port that was no longer the correct COM port.   A device was
there but it wasn't the KAT500.Try unplugging all other USB devices
that you can, leaving only the KAT500 connected,  and start the
application again.  (Kill the task in the process list if you see it's
already there)  If no joy, try disabling any COM port sharing software
you might be using as well.

I just tried to find where the KAT500 utility stores config info and
interestingly didn't find a thing in what looks to be the right place
(  %appdata%\Elecraft\KAT500 Configuration)   The folder is empty!
Was hoping it was just a config file that we could look at.

Might I suggest you look in the Control Panel Device Manager, and
determine which port is being assigned to the KAT500.   It should be
listed under Ports and LPT   It shows up as USB Serial Port (COMx)  
Where x is a number.  Make mental note of what the COMx is in your
case.That at least means that the KAT500 is being recognized by the
computer and is assigned a COM port.   If this port assignment doesn't
make sense from what you expect or what it was using previously,
possibly the Utility is hung  while trying to use different port than
what it is being assigned to the KAT500 now-- and not doing a good job
of telling you it's having an issue.

Have you tried uninstalling the Utility completely and then reinstall
it?   Hopefully the uninstaller will remove the incorrect configuration
information on the way out.  The developer needs to chime in on where
that is kept.

Warren
KD4Z


On 8/23/2015 10:22 PM, Ken K6MR wrote:
 This is a tough one given that everyone else is likely running without issue.

 The common/obvious question: did you install as Administrator and are you 
 running the utility as Administrator? Depending on resource requests from the 
 program this can be a problem. Is the user you are running as an 
 Administrator? If not, right click on the setup file and select “Run as 
 Administrator”. Do the same when running the Utility. 

 I just downloaded the latest utility and installed/ran without issue.  This 
 is Win10 x64, but I also run it on W7.

 Ken K6MR


 From: Brian Linn
 Sent: Sunday, August 23, 2015 17:22
 To: elecraft@mailman.qth.net
 Subject: [Elecraft] KAT500 Utility


 To Anyone!

  

 Issue: KAT500 Utility will not run

 Version: 1.14.4.10

 Windows: 7 Pro 64 bit

 Observations:

 1)  It appears to correctly install

 2)  When one attempts to start the utility, it shows in the Task Manager
 as a process (KAT500Utility.exe *32)

 3)  The application window does not show on the screen.

 4)  The application is not listed in the Task Manager under
 Applications.

 5)  If one attempts to start the utility again, the application window
 will show on the screen and a second process will show in the Task Manager
 processes.

 6)  The application then goes into a Not Responding state.

  

 Any ideas are welcome.

  

 73, 

 Brian KD0HII

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Re: [Elecraft] KAT500 Utility

[Kenneth Christiansen]

Hi to the group.

I have not wanted to get into this discussion but I have had a similar problem 
with other programs and will throw this out just in case it is your problem. If 
you have a second monitor and display that program on the second monitor the 
program will not show up on the main monitor even if the second monitor is 
missing. I had to put my second monitor back on and move the program back to 
see it. This happens on Windows 8, 8.1 and 10 so you might give that a try. 

73 and hope I did not waste band width.

Ken  W0CZ   w0cz at i29 dot net

Sent from my iPad

 On Aug 24, 2015, at 6:34 PM, Brian Linn br...@brianlinn.com wrote:
 
 Warren:
 
 FYI. I'm running into serial ports on the PC, not USB.
 
 Brian KD0HII
 
 -Original Message-
 From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Warren 
 Merkel
 Sent: Monday, August 24, 2015 07:21
 To: elecraft@mailman.qth.net
 Subject: Re: [Elecraft] KAT500 Utility
 
 Brian,
 
 I had this happen to me one time.I believe it was trying to find the
 KAT500 on a port that was no longer the correct COM port.   A device was
 there but it wasn't the KAT500.Try unplugging all other USB devices
 that you can, leaving only the KAT500 connected,  and start the application 
 again.  (Kill the task in the process list if you see it's already there)  If 
 no joy, try disabling any COM port sharing software you might be using as 
 well.
 
 I just tried to find where the KAT500 utility stores config info and 
 interestingly didn't find a thing in what looks to be the right place
 (  %appdata%\Elecraft\KAT500 Configuration)   The folder is empty!
 Was hoping it was just a config file that we could look at.
 
 Might I suggest you look in the Control Panel Device Manager, and
 determine which port is being assigned to the KAT500.   It should be
 listed under Ports and LPT   It shows up as USB Serial Port (COMx)  
 Where x is a number.  Make mental note of what the COMx is in your
 case.That at least means that the KAT500 is being recognized by the
 computer and is assigned a COM port.   If this port assignment doesn't
 make sense from what you expect or what it was using previously, possibly the 
 Utility is hung  while trying to use different port than what it is being 
 assigned to the KAT500 now-- and not doing a good job of telling you it's 
 having an issue.
 
 Have you tried uninstalling the Utility completely and then reinstall
 it?   Hopefully the uninstaller will remove the incorrect configuration
 information on the way out.  The developer needs to chime in on where that is 
 kept.
 
 Warren
 KD4Z
 
 
 On 8/23/2015 10:22 PM, Ken K6MR wrote:
 This is a tough one given that everyone else is likely running without issue.
 
 The common/obvious question: did you install as Administrator and are you 
 running the utility as Administrator? Depending on resource requests from 
 the program this can be a problem. Is the user you are running as an 
 Administrator? If not, right click on the setup file and select “Run as 
 Administrator”. Do the same when running the Utility. 
 
 I just downloaded the latest utility and installed/ran without issue.  This 
 is Win10 x64, but I also run it on W7.
 
 Ken K6MR
 
 
 From: Brian Linn
 Sent: Sunday, August 23, 2015 17:22
 To: elecraft@mailman.qth.net
 Subject: [Elecraft] KAT500 Utility
 
 
 To Anyone!
 
 
 
 Issue: KAT500 Utility will not run
 
 Version: 1.14.4.10
 
 Windows: 7 Pro 64 bit
 
 Observations:
 
 1)  It appears to correctly install
 
 2)  When one attempts to start the utility, it shows in the Task Manager
 as a process (KAT500Utility.exe *32)
 
 3)  The application window does not show on the screen.
 
 4)  The application is not listed in the Task Manager under
 Applications.
 
 5)  If one attempts to start the utility again, the application window
 will show on the screen and a second process will show in the Task 
 Manager processes.
 
 6)  The application then goes into a Not Responding state.
 
 
 
 Any ideas are welcome.
 
 
 
 73,
 
 Brian KD0HII
 
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 list: http://www.qsl.net/donate.html Message delivered to 
 k...@outlook.com
 
 
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 Help

Re: [Elecraft] KAT500 Utility

[Brian Linn]

Warren:

FYI. I'm running into serial ports on the PC, not USB.

Brian KD0HII

-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Warren 
Merkel
Sent: Monday, August 24, 2015 07:21
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] KAT500 Utility

Brian,

I had this happen to me one time.I believe it was trying to find the
KAT500 on a port that was no longer the correct COM port.   A device was
there but it wasn't the KAT500.Try unplugging all other USB devices
that you can, leaving only the KAT500 connected,  and start the application 
again.  (Kill the task in the process list if you see it's already there)  If 
no joy, try disabling any COM port sharing software you might be using as well.

I just tried to find where the KAT500 utility stores config info and 
interestingly didn't find a thing in what looks to be the right place
(  %appdata%\Elecraft\KAT500 Configuration)   The folder is empty!
Was hoping it was just a config file that we could look at.

Might I suggest you look in the Control Panel Device Manager, and
determine which port is being assigned to the KAT500.   It should be
listed under Ports and LPT   It shows up as USB Serial Port (COMx)  
Where x is a number.  Make mental note of what the COMx is in your
case.That at least means that the KAT500 is being recognized by the
computer and is assigned a COM port.   If this port assignment doesn't
make sense from what you expect or what it was using previously, possibly the 
Utility is hung  while trying to use different port than what it is being 
assigned to the KAT500 now-- and not doing a good job of telling you it's 
having an issue.

Have you tried uninstalling the Utility completely and then reinstall
it?   Hopefully the uninstaller will remove the incorrect configuration
information on the way out.  The developer needs to chime in on where that is 
kept.

Warren
KD4Z


On 8/23/2015 10:22 PM, Ken K6MR wrote:
 This is a tough one given that everyone else is likely running without issue.

 The common/obvious question: did you install as Administrator and are you 
 running the utility as Administrator? Depending on resource requests from the 
 program this can be a problem. Is the user you are running as an 
 Administrator? If not, right click on the setup file and select “Run as 
 Administrator”. Do the same when running the Utility. 

 I just downloaded the latest utility and installed/ran without issue.  This 
 is Win10 x64, but I also run it on W7.

 Ken K6MR


 From: Brian Linn
 Sent: Sunday, August 23, 2015 17:22
 To: elecraft@mailman.qth.net
 Subject: [Elecraft] KAT500 Utility


 To Anyone!

  

 Issue: KAT500 Utility will not run

 Version: 1.14.4.10

 Windows: 7 Pro 64 bit

 Observations:

 1)  It appears to correctly install

 2)  When one attempts to start the utility, it shows in the Task Manager
 as a process (KAT500Utility.exe *32)

 3)  The application window does not show on the screen.

 4)  The application is not listed in the Task Manager under
 Applications.

 5)  If one attempts to start the utility again, the application window
 will show on the screen and a second process will show in the Task 
 Manager processes.

 6)  The application then goes into a Not Responding state.

  

 Any ideas are welcome.

  

 73,

 Brian KD0HII

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Re: [Elecraft] KAT500 Utility

[Brian Linn]

All:

Thanks for the input. I've determined that I do indeed have a problem with the 
4 port serial card. Thus, before going any further here, I'm going to run some 
tests and see about getting the ports working properly.

73, Brian KD0HII

-Original Message-
From: Kenneth Christiansen [mailto:w...@i29.net] 
Sent: Monday, August 24, 2015 20:41
To: Brian Linn
Cc: Warren Merkel; elecraft@mailman.qth.net
Subject: Re: [Elecraft] KAT500 Utility

Hi to the group.

I have not wanted to get into this discussion but I have had a similar problem 
with other programs and will throw this out just in case it is your problem. If 
you have a second monitor and display that program on the second monitor the 
program will not show up on the main monitor even if the second monitor is 
missing. I had to put my second monitor back on and move the program back to 
see it. This happens on Windows 8, 8.1 and 10 so you might give that a try. 

73 and hope I did not waste band width.

Ken  W0CZ   w0cz at i29 dot net

Sent from my iPad

 On Aug 24, 2015, at 6:34 PM, Brian Linn br...@brianlinn.com wrote:
 
 Warren:
 
 FYI. I'm running into serial ports on the PC, not USB.
 
 Brian KD0HII
 
 -Original Message-
 From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of 
 Warren Merkel
 Sent: Monday, August 24, 2015 07:21
 To: elecraft@mailman.qth.net
 Subject: Re: [Elecraft] KAT500 Utility
 
 Brian,
 
 I had this happen to me one time.I believe it was trying to find the
 KAT500 on a port that was no longer the correct COM port.   A device was
 there but it wasn't the KAT500.Try unplugging all other USB devices
 that you can, leaving only the KAT500 connected,  and start the application 
 again.  (Kill the task in the process list if you see it's already there)  If 
 no joy, try disabling any COM port sharing software you might be using as 
 well.
 
 I just tried to find where the KAT500 utility stores config info and 
 interestingly didn't find a thing in what looks to be the right place
 (  %appdata%\Elecraft\KAT500 Configuration)   The folder is empty!
 Was hoping it was just a config file that we could look at.
 
 Might I suggest you look in the Control Panel Device Manager, and
 determine which port is being assigned to the KAT500.   It should be
 listed under Ports and LPT   It shows up as USB Serial Port (COMx)  
 Where x is a number.  Make mental note of what the COMx is in your
 case.That at least means that the KAT500 is being recognized by the
 computer and is assigned a COM port.   If this port assignment doesn't
 make sense from what you expect or what it was using previously, possibly the 
 Utility is hung  while trying to use different port than what it is being 
 assigned to the KAT500 now-- and not doing a good job of telling you it's 
 having an issue.
 
 Have you tried uninstalling the Utility completely and then reinstall
 it?   Hopefully the uninstaller will remove the incorrect configuration
 information on the way out.  The developer needs to chime in on where that is 
 kept.
 
 Warren
 KD4Z
 
 
 On 8/23/2015 10:22 PM, Ken K6MR wrote:
 This is a tough one given that everyone else is likely running without issue.
 
 The common/obvious question: did you install as Administrator and are you 
 running the utility as Administrator? Depending on resource requests from 
 the program this can be a problem. Is the user you are running as an 
 Administrator? If not, right click on the setup file and select “Run as 
 Administrator”. Do the same when running the Utility. 
 
 I just downloaded the latest utility and installed/ran without issue.  This 
 is Win10 x64, but I also run it on W7.
 
 Ken K6MR
 
 
 From: Brian Linn
 Sent: Sunday, August 23, 2015 17:22
 To: elecraft@mailman.qth.net
 Subject: [Elecraft] KAT500 Utility
 
 
 To Anyone!
 
 
 
 Issue: KAT500 Utility will not run
 
 Version: 1.14.4.10
 
 Windows: 7 Pro 64 bit
 
 Observations:
 
 1)  It appears to correctly install
 
 2)  When one attempts to start the utility, it shows in the Task Manager
 as a process (KAT500Utility.exe *32)
 
 3)  The application window does not show on the screen.
 
 4)  The application is not listed in the Task Manager under
 Applications.
 
 5)  If one attempts to start the utility again, the application window
 will show on the screen and a second process will show in the Task 
 Manager processes.
 
 6)  The application then goes into a Not Responding state.
 
 
 
 Any ideas are welcome.
 
 
 
 73,
 
 Brian KD0HII
 
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 Elecraft

[Elecraft] KAT500 Utility

[Brian Linn]

To Anyone!

 

Issue: KAT500 Utility will not run

Version: 1.14.4.10

Windows: 7 Pro 64 bit

Observations:

1)  It appears to correctly install

2)  When one attempts to start the utility, it shows in the Task Manager
as a process (KAT500Utility.exe *32)

3)  The application window does not show on the screen.

4)  The application is not listed in the Task Manager under
Applications.

5)  If one attempts to start the utility again, the application window
will show on the screen and a second process will show in the Task Manager
processes.

6)  The application then goes into a Not Responding state.

 

Any ideas are welcome.

 

73, 

Brian KD0HII

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Re: [Elecraft] KAT500 Utility

[Ken K6MR]

This is a tough one given that everyone else is likely running without issue.

The common/obvious question: did you install as Administrator and are you 
running the utility as Administrator? Depending on resource requests from the 
program this can be a problem. Is the user you are running as an Administrator? 
If not, right click on the setup file and select “Run as Administrator”. Do the 
same when running the Utility. 

I just downloaded the latest utility and installed/ran without issue.  This is 
Win10 x64, but I also run it on W7.

Ken K6MR


From: Brian Linn
Sent: Sunday, August 23, 2015 17:22
To: elecraft@mailman.qth.net
Subject: [Elecraft] KAT500 Utility


To Anyone!

 

Issue: KAT500 Utility will not run

Version: 1.14.4.10

Windows: 7 Pro 64 bit

Observations:

1)  It appears to correctly install

2)  When one attempts to start the utility, it shows in the Task Manager
as a process (KAT500Utility.exe *32)

3)  The application window does not show on the screen.

4)  The application is not listed in the Task Manager under
Applications.

5)  If one attempts to start the utility again, the application window
will show on the screen and a second process will show in the Task Manager
processes.

6)  The application then goes into a Not Responding state.

 

Any ideas are welcome.

 

73, 

Brian KD0HII

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[Elecraft] KAT500 Remote Utility

[Wes (N7WS)]

I'm trying to use the KAT500 Remote Utility and having an issue. I've used this 
in the past without incident, although that may have been an earlier version.


The current version 1.0.9.0 connects to the KAT500 normally, briefly displays 
the (correct) state of the tuner then almost immediately crashes.  Can anyone 
else verify this and/or offer a fix?


Thanks, Wes  N7WS
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[Elecraft] KAT500 / W2 Serial Connection

[Brian Linn]

Don  Elecraft:

 

I'm having difficulty connecting to either my KAT500 or W2 via a serial
cable. Is the KSXER (3.5mm to DB9-F) any different from the standard 3.5mm
to DB9-F that I already own?

 

Brian KD0HII

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Re: [Elecraft] KAT500 / W2 Serial Connection

[Don Wilhelm]

Brian,

I don't know which DE-9 to 3.5mm cable that you currently have, but it 
is easy to check with an ohmmeter.

Does DE9 pin 5 connect to the shell of the 3.5mm?  That is Signal Ground.
Next check DE-9 pin 2 - that should connect to the tip of the 3.5mm plug.
Then DE-9 pin 3 should connect to the ring of the 3.5mm plug.

If all the cables you are asking about come from Elecraft gear, the 
answer is that they are interchangeable.


OK, there is some confusion in the designation of RXD and TXD - if the 
tip and ring connections are swapped in my connections above, that is 
the result of that confusion - in other words, if pins 2 and 3 are 
swapped from my description, it is my error, and the cable will work.


73,
Don W3FPR

On 8/17/2015 9:34 PM, Brian Linn wrote:

Don  Elecraft:

  


I'm having difficulty connecting to either my KAT500 or W2 via a serial
cable. Is the KSXER (3.5mm to DB9-F) any different from the standard 3.5mm
to DB9-F that I already own?

  


Brian KD0HII

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Re: [Elecraft] KAT500 Bypass?

[ab2tc]

Hi,

No compensation is necessary. I have a Ridge Equipment dummy load on one of
my ports and it measures 1.02 with an LP-100A in SWR in bypass mode on 10m.

AB2TC - Knut


Dick Dievendorff-4 wrote
 The former. 
 
 Dick, K6KR
 
 Sent from my iPhone
 
 On Aug 9, 2015, at 18:17, Jim Miller lt;

 jim@

 gt; wrote:
 
 When the KAT500 is in Bypass are all elements really bypassed?
 
 Or are they bypassed with compensation for the internal paths?
 
 Is there an internal bypass calibration required?
 
 73
 
 jim ab3cv
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Re: [Elecraft] KAT500 Bypass?

[brian]

I once did a TDR measurement of the distance between the input and 
output in bypass mode.
It comes out to be about 18.Interesting,  I would have expected 
much less.


73 de Brian/K3KO
On 8/11/2015 16:55 PM, ab2tc wrote:

Hi,

No compensation is necessary. I have a Ridge Equipment dummy load on one of
my ports and it measures 1.02 with an LP-100A in SWR in bypass mode on 10m.

AB2TC - Knut


Dick Dievendorff-4 wrote

The former.

Dick, K6KR

Sent from my iPhone


On Aug 9, 2015, at 18:17, Jim Miller lt;

jim@
gt; wrote:

When the KAT500 is in Bypass are all elements really bypassed?

Or are they bypassed with compensation for the internal paths?

Is there an internal bypass calibration required?

73

jim ab3cv
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-
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Checked by AVG - www.avg.com
Version: 2015.0.6086 / Virus Database: 4401/10416 - Release Date: 08/11/15




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[Elecraft] KAT500 Bypass?

[Jim Miller]

When the KAT500 is in Bypass are all elements really bypassed?

Or are they bypassed with compensation for the internal paths?

Is there an internal bypass calibration required?

73

jim ab3cv
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Re: [Elecraft] KAT500 Bypass?

[Dick Dievendorff]

The former. 

Dick, K6KR

Sent from my iPhone

 On Aug 9, 2015, at 18:17, Jim Miller j...@jtmiller.com wrote:
 
 When the KAT500 is in Bypass are all elements really bypassed?
 
 Or are they bypassed with compensation for the internal paths?
 
 Is there an internal bypass calibration required?
 
 73
 
 jim ab3cv
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Re: [Elecraft] KAT500 tuner

[fromjustthek...@frontier.com]

Hi again Alan,
As far as your IC-7100 goes using the KAT500 auto tuner, the only thing that 
you should do as I mentioned in my earlier post (to make sure that the KAT500 
is giving you the most accurate tuning possible), is to increase the 7100's 
power out to about 30 watts, press the TUNE button (or use the AUTO mode) on 
the KAT500 for EACH new frequency you want to tune up on each band, and that 
setting will be automatically stored, for each frequency, band and antenna you 
tuned up on.
Once that is done, put the KAT500 in MAN (MANUAL) mode, go to whatever 
frequency you want to operate on, and INSTEAD of pressing the TUNER/CALL 
button, just hold down the PTT button the mic for a moment and the KAT500 will 
recall the tuner's settings for that (or the nearest to that) frequency. 
Remember that once the settings are all stored, you can leave your power level 
at whatever you want to use. Just that simple.
You will be very happy I'm sure using the KAT500 both with your K3  KPA500, as 
well as your IC-7100.
Have fun. 73, Alan, AB6C

Original message:
Date: Fri, 7 Aug 2015 00:37:01 +0100
From: G4GNX g4...@theatreorgans.co.uk
To: Elecraft Reflector elecraft@mailman.qth.net
Subject: Re: [Elecraft] KAT500 tuner
Message-ID: 54F3584BBB30495B92CC467539701276@Paramount
Content-Type: text/plain; format=flowed; charset=utf-8;
    reply-type=original

Thanks to all of you who replied to my initial message. I think I'd part 
convinced myself that I would prefer the KAT500 and your various comments 
have reinforced those thoughts.

The KAT500 User Manual mentions use of the AH-4 protocol, which is what the 
IC7100 uses. It also mentions use of 7 Watts, so I would hope that the 
IC7100 would work OK as it outputs 10W in tune mode.

It's more important to me that the K3 and KPA500 interfaces with the KAT500, 
the Icom interface would be a secondary useful bonus.

73,

Alan. G4GNX
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Re: [Elecraft] KAT500 tuner

[G4GNX]

Thanks to all of you who replied to my initial message. I think I'd part 
convinced myself that I would prefer the KAT500 and your various comments 
have reinforced those thoughts.


The KAT500 User Manual mentions use of the AH-4 protocol, which is what the 
IC7100 uses. It also mentions use of 7 Watts, so I would hope that the 
IC7100 would work OK as it outputs 10W in tune mode.


It's more important to me that the K3 and KPA500 interfaces with the KAT500, 
the Icom interface would be a secondary useful bonus.


73,

Alan. G4GNX

-Original Message- 
From: Vic Rosenthal

Sent: Wednesday, August 05, 2015 9:00 AM
To: G4GNX
Cc: Elecraft Reflector
Subject: Re: [Elecraft] KAT500 tuner

It would be interesting to compare the toroids and capacitors in both 
products. My guess is that they would be similar, and the difference in 
ratings is based on the degree to which the manufacturer wishes to be 
conservative. As I've said on numerous occasions, MFJ products are rated in 
MFJ watts, which are half the size of regular watts (Pmfj = 2EI).


Vic 4X6GP/K2VCO


On Aug 5, 2015, at 4:47 AM, G4GNX g4...@theatreorgans.co.uk wrote:

Hi all.

I am contemplating purchasing a KPA500 amplifier to complement my K3.

I currently have a MFJ 998 tuner which is good for 1.5KW but I think that 
the KAT500 tuner from Elecraft will be a superior product. Would this be a 
sensible assumption?


If I also buy the KAT500, will it easily interface with my Icom IC700 and 
is there a specific setting that would allow me to use the IC7100 “Tune” 
button, which allows tuning at reduced power (ISTR it’s set at 10watts)?


73,

Alan. G4GNX 


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Re: [Elecraft] KAT500 tuner

[Vic Rosenthal]

It would be interesting to compare the toroids and capacitors in both products. 
My guess is that they would be similar, and the difference in ratings is based 
on the degree to which the manufacturer wishes to be conservative. As I've said 
on numerous occasions, MFJ products are rated in MFJ watts, which are half the 
size of regular watts (Pmfj = 2EI).

Vic 4X6GP/K2VCO

 On Aug 5, 2015, at 4:47 AM, G4GNX g4...@theatreorgans.co.uk wrote:
 
 Hi all.
 
 I am contemplating purchasing a KPA500 amplifier to complement my K3.
 
 I currently have a MFJ 998 tuner which is good for 1.5KW but I think that the 
 KAT500 tuner from Elecraft will be a superior product. Would this be a 
 sensible assumption?
 
 If I also buy the KAT500, will it easily interface with my Icom IC700 and is 
 there a specific setting that would allow me to use the IC7100 “Tune” button, 
 which allows tuning at reduced power (ISTR it’s set at 10watts)? 
 
 73,
 
 Alan. G4GNX
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Re: [Elecraft] KAT500 tuner

[David Bunte]

Alan -

If you are satisfied with the performance of the MFJ tuner, you can
certainly give it a try.  A friend of mine had one to sell a few years ago,
and let me try it on my very NON-resonant antenna.  I have a 30' vertical
that requires a tuner on any except 30 meters.  The tuner in the K3 handles
it quite well on 40 through 6 meters, but struggles on 80, where the native
SWR is about 18:1.  The MFJ 998 could not achieve a decent match on 2 or 3
bands, including 40 meters, which is one of my favorite bands.  I wanted to
get an amplifier, so I did not did not buy the 998.  I now have the KAT500
and KPA500.  The KAT500 has no trouble with those bands, so I can run my
amp at full power when and where I want... except for 80.  For that band, I
switch to a Palstar AT-AUTO, and can run the amp at 500 watts.  I know they
don't all get to the antenna, but I have only 30' of coax from there to the
antenna, and the coax is LMR600, so I have mitigated the losses somewhat.

A friend had a MFJ998 that he mounted outside in a weatherproof enclosure,
and ran 1500 watts to an inverted L.  He was very happy with that setup,
until a tree fell on the enclosure and destroyed the tuner.  He then bought
the MFJ998RT, and last I heard he was satisfied with it.

I am sorry, but I am not sure about the integration of the KAT500 with your
Icom 7100.  Another friend used his Icom 7566PROIII with his KAT500, and
had to press Tune on the rig... and then Tune on the tuner... but once the
settings were memorized, then just a single DIT from the key, or a syllable
or two on SSB and the KAT500 was all set and ready to go.

73 de Dave - K9FN

On Tue, Aug 4, 2015 at 9:47 PM, G4GNX g4...@theatreorgans.co.uk wrote:

 Hi all.

 I am contemplating purchasing a KPA500 amplifier to complement my K3.

 I currently have a MFJ 998 tuner which is good for 1.5KW but I think that
 the KAT500 tuner from Elecraft will be a superior product. Would this be a
 sensible assumption?

 If I also buy the KAT500, will it easily interface with my Icom IC700 and
 is there a specific setting that would allow me to use the IC7100 “Tune”
 button, which allows tuning at reduced power (ISTR it’s set at 10watts)?

 73,

 Alan. G4GNX
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Re: [Elecraft] KAT500 tuner

[fromjustthek...@frontier.com]

Hi Alan,

I think I can give you some insight. I have the KAT500 auto tuner that I used 
first with my Icom IC-756Pro3, and now with my IC-7600. I also have an IC-7000 
as well for mobile use, but have not used it with it, and since it doesn't have 
a built in auto tuner, I don't know for sure what amount of RF it may put out 
when a non-Icom auto tuner is connected to its Molex tuner port. For an Icom 
AH-4 for example, its specs state that tuning power required is 5-15 watts and 
that radiated power during tuning is less than 0.3 watt.

If you use the KAT500 with any rig that does have an internal automatic tuner, 
make absolutely sure that it is turned off at any time the KAT500 is in use. 
Internal auto tuners and external auto tuners do not cohabit well, 
consequently, any tune settings will be greatly suspect. Its either one or the 
other, never both in circuit at the same time.

I too intended to use it by pushing the TUNER on the rig, which puts out about 
10 watts or so as all modern Icom transceivers do as far as I know. 
Unfortunately, the KAT500 really needs to see somewhere in the vicinity of 
about 30 watts RF out, in order to accurately tune the radio. I talked to 
Elecraft tech support extensively, (who by the way are about the best in the 
business, both professionally and technically) regarding getting different tune 
settings using the tuner button (at 10 watts out) on the rig vs manually 
setting power out to about 30 watts.
On the Elecraft website, in the FAQ's, it says:
Q: Can I use a 5 or 10 watt radio with the KAT500?A: The KAT500 can tune with 
10 W but we recommend 20 W to 100 W for best tuning accuracy. If the KAT500 has 
already stored a tuning memory for the current frequency, it is possible to 
recall the tuned memory setting with less than 10 W. The KAT500 measures 
transmit frequency to automatically select tuning memories and antennas.
So, based on Elecraft tech support's recommendations, I manually used 30 watts 
to train the tuner to memorize all the frequencies I wanted to be stored, 
which worked very well, and continues to do so to this day. But that is WITHOUT 
using the TUNER button on the rig WITH a cable connected between Icom's TUNER 
Molex connector on the back of the rig, and the other end going to the back of 
the KAT500's TUNE jack and power jack.

 The bottom line turned out to be that IF the rig's TUNER button is used to 
train or use the KAT500 to tune new frequencies (with the cable described above 
and because it only puts out 10 watts this way), the results you get will not 
be as accurate, or reliable as those you would get by manually using it using 
the TUNE button on the KAT500 itself (with no cable connected to the Molex 
connector on the rig going to the KAT500). All of this was verified by Elecraft.
In reality, using the TUNE button on the KAT500 is just as fast as using the 
tuner button on the rig with the sole exception that you DO have to set the 
power out to about 30 watts. It may well be that it will work similarly with 
your IC-7000.

Hope this gives you some insight as to what I found out. If you get the KAT500, 
you will love it!!! I do. Let us know how it works for you. I'm sure that 
others will be very interested as well.

73, Alan, AB6C

Original Message:
Message: 15Date: Wed, 5 Aug 2015 02:47:10 +0100
From: G4GNX g4...@theatreorgans.co.uk
To: Elecraft Reflector elecraft@mailman.qth.net
Subject: [Elecraft] KAT500 tuner
Message-ID: D70706FE6C0142C6B7A0CFB5767F3475@Paramount
Content-Type: text/plain;    charset=Windows-1252

Hi all.

I am contemplating purchasing a KPA500 amplifier to complement my K3.

I currently have a MFJ 998 tuner which is good for 1.5KW but I think that the 
KAT500 tuner from Elecraft will be a superior product. Would this be a sensible 
assumption?

If I also buy the KAT500, will it easily interface with my Icom IC700 and is 
there a specific setting that would allow me to use the IC7100 ?Tune? button, 
which allows tuning at reduced power (ISTR it?s set at 10watts)? 

73,

Alan. G4GNX
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Re: [Elecraft] KAT500 tuner

[edeveloper_1--- via Elecraft]

Hi Alan,
Like you, I have an MFJ-998 auto tuner, but was never really satisfied with its 
integration with the Elecraft K3. I suggested to Martin that MFJ produce a 
cable to integrate with Elecraft radios, but that hasn't yet happened so far as 
I know.
Based on the superb tuning capability that the internal K3 tuner has, I decided 
to take the plunge on a KAT500. I can't be happier that I did. The integration 
with the K3 is seamless and pretty much flawless. The tuner follows my K3 
wherever it goes, quickly and silently (silently because I've stored matches 
for all bands; on the initial tune there's of need a bit of clatter but nothing 
like the 998's) matching my two low wire dipoles on all bands including 6M, 
though 160M is a bit tough because of the 52-foot length of the wires. I don't 
get the surprise! tune-ups that I got with the 998. I get many more matches 
on 160M and 80M than I got with the 998. All I have to do is switch my amp when 
I change bands now. At some point I know I'll end up with a KPA500 and that 
switching function will become a thing of the past too. I recently added a 
third antenna (coil-loaded sloper) for 160M/80M and the KAT500 loads it up 
beautifully. It's sweet that that particular antenna remains always selected 
for those two bands.
I suspect that at least in part, the MFJ-998 is designed to evaluate situations 
where it must expect the user will throw a full 1.5KW at it into a really poor 
match, and it then must say My components really aren't designed for that 
particular extreme, and I can't give you a 2:1 match.There's no way for me to 
tell it Hey, I'm never sending you more than 800, I promise!
One thing I did like about the 998 is I had two sets of tuning settings - one 
for dry weather, and one for rainy/snowy weather. It was easy to switch between 
the two on each antenna.
Of course that is possible to do with the KAT500 as well. You can save a dry 
weather configuration file and a wet weather file and read the appropriate 
one into the tuner as needed. I've not yet gotten 'round to creating the wet 
weather file.
I keep the 998 around thinking one day MFJ will produce a cable for Elecraft 
radios, and I may decide to go through the hassle of getting a building permit 
to install 240v to the shack, and go fully QRO. Until then, it's not connected 
to anything now and the KAT500 is my do-it-all tuner for all occasions.
I went the kit route with the KAT500 and like all the Elecraft kits, it was a 
barrel of fun to assemble.
I can't speak to how the KAT500 will integrate with your Icom, but as for its 
integration with the K3, it's the bees knees.
73, Tyler, KC2LST
--
Message: 15Date: Wed, 5 Aug 2015 02:47:10 +0100From: G4GNX 
g4...@theatreorgans.co.ukTo: Elecraft Reflector 
elecraft@mailman.qth.netSubject: [Elecraft] KAT500 tunerMessage-ID: 
D70706FE6C0142C6B7A0CFB5767F3475@ParamountContent-Type: text/plain;    
charset=Windows-1252
Hi all.
I am contemplating purchasing a KPA500 amplifier to complement my K3.
I currently have a MFJ 998 tuner which is good for 1.5KW but I think that the 
KAT500 tuner from Elecraft will be a superior product. Would this be a sensible 
assumption?
If I also buy the KAT500, will it easily interface with my Icom IC700 and is 
there a specific setting that would allow me to use the IC7100 ?Tune? button, 
which allows tuning at reduced power (ISTR it?s set at 10watts)? 
73,
Alan. G4GNX
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[Elecraft] KAT500 tuner

[G4GNX]

Hi all.

I am contemplating purchasing a KPA500 amplifier to complement my K3.

I currently have a MFJ 998 tuner which is good for 1.5KW but I think that the 
KAT500 tuner from Elecraft will be a superior product. Would this be a sensible 
assumption?

If I also buy the KAT500, will it easily interface with my Icom IC700 and is 
there a specific setting that would allow me to use the IC7100 “Tune” button, 
which allows tuning at reduced power (ISTR it’s set at 10watts)? 

73,

Alan. G4GNX
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Re: [Elecraft] KAT500 won't tune the 6 meter antenna

[John Lemay]

I can't help you with the KAT500 question, but with a 13 to 1 SWR on 6m you
would be strongly advised to improve the match at the aerial.

John G4ZTR

-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of George
Rebong
Sent: 05 July 2015 23:15
To: elecraft@mailman.qth.net
Subject: [Elecraft] KAT500 won't tune the 6 meter antenna

My KAT500 doesn't tune my 6 meter antenna. I tried it on AUTO mode and
MANUAL mode. The antenna has 13:1 SWR.  The KAT500 relays doesn't make noise
when I keyed the K3.  Did I miss something?
73
George KE6TE

Sent from my iPad
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Re: [Elecraft] KAT500 won't tune the 6 meter antenna

[Guy Olinger K2AV]

Hi George,

A 13:1 SWR is what you might measure on 50 MHz looking into 50 feet of RG8
with NOTHING attached to the far end. From a reasonableness and efficiency
standpoint one should not plan anything more than 3:1 as a normal load for
a coax in coax out tuner. Less than that as frequency goes up.

Particularly 10m and above can have quite a bit of loss if not operated
well-matched (1.5:1 or less) over coax long enough to go from a shack
outside and up to an elevated antenna.

An antenna tuner is not a remote trouble neutralizer. Time to find out what
is busted in the antenna up there, or if the coax is cut or crushed.

Good luck on chasing down the trouble. Been there done that for sure. :)

73, Guy K2AV

On Monday, July 6, 2015, John Lemay j...@carltonhouse.eclipse.co.uk wrote:

 I can't help you with the KAT500 question, but with a 13 to 1 SWR on 6m you
 would be strongly advised to improve the match at the aerial.

 John G4ZTR

 -Original Message-
 From: Elecraft [mailto:elecraft-boun...@mailman.qth.net javascript:;]
 On Behalf Of George
 Rebong
 Sent: 05 July 2015 23:15
 To: elecraft@mailman.qth.net javascript:;
 Subject: [Elecraft] KAT500 won't tune the 6 meter antenna

 My KAT500 doesn't tune my 6 meter antenna. I tried it on AUTO mode and
 MANUAL mode. The antenna has 13:1 SWR.  The KAT500 relays doesn't make
 noise
 when I keyed the K3.  Did I miss something?
 73
 George KE6TE

 Sent from my iPad
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[Elecraft] KAT500 won't tune the 6 meter antenna

[George Rebong]

My KAT500 doesn't tune my 6 meter antenna. I tried it on AUTO mode and MANUAL 
mode. The antenna has 13:1 SWR.  The KAT500 relays doesn't make noise when I 
keyed the K3.  Did I miss something?
73
George KE6TE

Sent from my iPad
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Re: [Elecraft] KAT500 won't tune the 6 meter antenna

[Jack Brindle]

Yes. Check the KAT500 specs on page 2 of the KAT500 manual. The tuner is 
limited to matching no more than a 10:1 SWR in the HF range, and lower at VHF. 
Note that this is specified for 500 watts of power, so you may be able to get a 
little more. 13:1 indicates a very bad match, however. You will be burning up 
most of your TX power in the coax between the tuner and the antenna.

By far the best thing you can do is to fix the antenna so that is presents a 
much better impedance to the feed line (and thus the tuner). Doing so will get 
much more of that precious power into the air.

- Jack B, W6FB
 
 On Jul 5, 2015, at 3:15 PM, George Rebong ke6t...@gmail.com wrote:
 
 My KAT500 doesn't tune my 6 meter antenna. I tried it on AUTO mode and MANUAL 
 mode. The antenna has 13:1 SWR.  The KAT500 relays doesn't make noise when I 
 keyed the K3.  Did I miss something?
 73
 George KE6TE
 
 Sent from my iPad
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