[Elecraft] [K3] K3 SWR Accuracy - reprise

[Wayne Burdick]

The KAT3 is between the two bridges. The two will see different  
impedences on some bands as a result of stray L and C. This probably  
accounts for some or most of the reading error.

73,
Wayne
N6KR

----
http://www.elecraft.com

On Nov 4, 2009, at 4:23 PM, ab2tc <ab2tc at arrl.net> wrote:

>
> Hello,
>
> Please, please, does anybody remember the original poster's problem  
> anymore?
>
> Quote:
>
> The results I got for 2:1 VSWR are as follows:-
>
>               LP-100           K3
> 160         1.99                1.8
> 80           1.99                1.8
> 60           1.99                1.8
> 40           1.95                1.8
> 30           1.97                1.6
> 20           1.97                1.4
> 17           1.97                1.3
> 15           1.96                1.2
> 12           1.96                1.5
> 10           1.96                1.4
>
>
> I am repeating. This makes no sense given that he is using a parallel
> combination of two dummy loads which results in a 2:1 SWR. I am  
> repeating:
> Either there is something wrong with the data or the K3 is faulty.  
> Errors
> this large should not occur with properly functioning equipment.
>
> AB2TC - Knut
>
>
> Steve Ellington wrote:
>>
>> The first statement is correct. Length of coax will transform  
>> impedance
>> and
>> cause SWR meters to read differently.
>> <dsnip>
>>
>
> -- 
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