[Elecraft] NG0R - K2 KAT2 LO P issue

[Don Wilhelm]

John,

How does the KAT2 react if you set it to CALP and do a TUNE (into a 
dummy load)?
Is the power indicated about the same as an external meter?  Try at 
several power levels - 2, 5, 10 and max power and use 40 meters.

LoP messages are not usually a tuner issue.  If the K2 is working 
normally, this message is an indication of a power supply issue.  Check 
the power supply voltage under load and the cable to the PS as well as 
the connectors.

If the power supply is OK, then remove the KAT2 and drive a dummy load 
from the base K2.  What is the maximum power output available on all 
bands?  If it is not at least 10 watts, there is a problem

73,
Don W3FPR

John Hoaglun wrote:
> I need some help troubleshooting a KAT issue.
>  
> I have a K2 (+KAT + Serial + 160m + 60m/transverter interface) that I have
> used quite a bit without any issues.
>  
> This weekend I decided to take my K2 out of town for the weekend on a family
> trip. I figured that I could measure & cut the wire dipoles, and test out
> the K2 with the new EEE laptop etc and in general just test & prep for the
> upcoming Field Day outing next weekend.
>  
> With the tuner set to Auto my K2 will not tune up properly. When I hit the
> Tune button I get a "1.0:1"  then "LO P" message.  (It does not matter what
> the P out is set to and the current draw is pretty low.)
>  
> When I got home tonight I plugged the k2 into the shack to test it again and
> I get the same results into my antennas and a known good dummy load. The
> radio is set to current limiting of 3.5 so that should not be issue. When I
> flip to the ATU menu to the setup and listen to the relays for the
> inductors, capacitors, and antenna jacks I hear all of the clicks where I
> expect them.
>  
> I am a bit panicked now as I thought that I was largely prepped for Field
> Day and my rig is having problems. (One of the many reasons that I built the
> K2 was for a Field Day rig and camping.)
>  
> I am looking for some troubleshooting directions as my window for this
> repair is pretty short.
>  
> Please respond to the list and direct (I get the digest version so CC direct
> and I will see the messages much sooner.)
>
> Thanks, JH
>  
> -----------------------------
> John Hoaglun
> NG0R - EN25
> http://www.hoaglun.com
>  
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