[Elecraft] K3 SWR error

[Radio Amateur N5GE]

On Sun, 14 Mar 2010 10:19:28 -0800 (PST), NZ0T <NZ0T at cox.net> wrote:

How much inaccuracy are you experiencing?

How did you determine that the K3 is inaccurate?  How did you
determine that the W2 is very accurate?

>
>I have K3-100 kit 1502 with the internal tuner and FW 3.76.  I know there
>have been many posts about the meter SWR error but I really haven't seen a
>resolution posted.  Before I bought my W2 I used a cheap SWR/Power meter and
>I thought the error was in it.  Now that I have the W2 (which appears to be
>very accurate) I see that the K3 SWR indication can be very different than
>my W2, Ten Tec tuner, analyzer and my other HF rigs with or without the
>internal tuner in line.  My concern is that if the K3 reads SWR incorrectly
>that the power may not fold back and there may be a risk of damage to the
>finals.  Is there any procedure to correct the error?  I understand that
>stray capacitance can cause differences but I would really like to have a
>more accurate measurement by the rig.

Tom, N5GE

K3 #806 with SUB RX, PR6, 
KRC2 and K144XV
K3 #1055 with PR6 and XV432
W1, 2 W2's and other small kits

http://www.n5ge.com
http://www.swotrc.net