[Elecraft] K3 SWR Accuracy - reprise

[N8LP]

Will the revision be generic to the extent that it will also improve the
readings for radios without the KAT3? My variations are not as great as
Jack's, I suspect due to not having the KAT3, but my readings are
consistently lower than Jack's, ie. 1.6 on most bands with a 2.0 load. Not a
big deal, but as long as you're in there tweaking the code, can you verify
that it works with non-KAT3 radios as well?

73,
Larry N8LP




wayne burdick wrote:
> 
> Great data, Jack. We've been testing this, too, and we know why the  
> K3's readings differ.
> 
> A firmware change will be made to improve the accuracy in general. But  
> part of the difference on the higher bands is due to strays in the  
> KAT3 module. These strays can be tuned out by the KAT3 itself, thus  
> presenting the correct load to the K3 internally. But an external  
> instrument is on the other side of the KAT3 and thus sees a slightly  
> different match.
> 
> We'll post additional details soon. Meanwhile, no one need worry about  
> this apparent discrepancy. The ATU is cancelling its own strays, and  
> the SWR bridge is correctly reporting the load presented to the  
> transceiver internally, which is the important thing when matching the  
> rig to its load.
> 
> 73,
> Wayne
> N6KR
> 
> 
> ----
> http://www.elecraft.com
> 
> On Nov 8, 2009, at 7:18 PM, "Edward Dickinson, III"
> <softblue at windstream.net 
>  > wrote:
> 
>>  _____
>>
>> From: Jack Smith [mailto:jack.smith at cliftonlaboratories.com]
>> Sent: Sunday, November 08, 2009 10:00 PM
>> To: Edward Dickinson, III
>> Subject: Re: [Elecraft] K3 SWR Accuracy - reprise
>>
>> Dick:
>>
>> http://www.cliftonlaboratories.com/swr_accuracy.htm
>>
>> I posted a message to the Elecraft reflector about the page being  
>> available
>> but it has not shown up after an hour and a half.
>>
>> Jack K8ZOA
>>
>>
>> Edward Dickinson, III wrote:
>>
>> Hi Jack.
>>
>>
>>
>> I extend invitation to apply your expertise regarding the matter being
>>
>> addressed in above referenced discussion.
>>
>>
>>
>>
>>
>> Best regards,
>>
>>
>>
>> Dick - KA5KKT
>>
>>
>>
>>
>>
>>
>>
>>
>>
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