[Elecraft] K3- SWR accuracy

[Jorge Diez - CX6VM]

Hi Bill,

I recently purchased a powerMaster from arraysolutions and have the same
problems.

Readings are different in the Powermaster and in the K3, .3 to .7 in
diference.

You have some coax loops going from SWR and AMP, so maybe some diference
there?.  Anyway is not reading the same...

73,
Jorge
CX6VM/CW5W
K3 #4077

-----Mensaje original-----
De: elecraft-bounces at mailman.qth.net
[mailto:elecraft-bounces at mailman.qth.net] En nombre de Bill Conkling
Enviado el: Lunes, 06 de Septiembre de 2010 01:25 a.m.
Para: Elecraft at mailman.qth.net
Asunto: [Elecraft] K3- SWR accuracy

Gang, 

 

I have recently built my K3 and have had it on the air about 3 weeks.  I
started small, with 10 watts, added the PA3 and DVR.  My next purchase will
be the ATU module.  In the meantime, I am using an LDG-200Pro Auto-Tuner.
It works great, but I have noticed that especially on 40 meters, I can have
the tuner go through a 'tune' cycle, and it will show 1.0:1 SWR, but my K3
shows 1.3 ro 1.7 up to 1.8 to 1 SWR.

 

I recorded a short call response with the DVR and when I play it back, the
radio shows SWR of more than 1:1 but the tuner indicates full power and low
SWR.  Which do I believe?  Most other bands are normal, with tuner/radio
agreement.   But not always, and especially on 40.

 

I tried to manually tune the tuner to 1:1 and usually only took a couple of
clicks, but no matter what I did, I could not get it to hold those settings;
ie, when I went back to the frequency I 'manually' tuned, and tried to
memorize, it tuned again, often only a Memory Tune, but went back to it's
settings of 1.3:1.

 

Any ideas?

 

...bc      K3  #4536  (nr4c)

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