[Elecraft] [K2] KAT100 error

[Don Wilhelm]

Damon,

First, remove the KPA100 from the picture (remove it from the EC2 
enclosure) and connect the KAT100 directly to the base K2 and see if it 
works OK - if my suspicion is correct, it will.

If the KAT100 checks out, then check 2 things - first diodes D16 and D17 
in the KPA100 and the short coax you are using between the KPA100 and 
the KAT100.

Let me know what you find.

73,
Don W3FPR

W4HDM wrote:
> My KAT100 was working fine then developed a problem recently.
> For those wondering what happened to my for sale listing this is why I
> removed it.
>
> At first the tune sequence would tune at times and other times it would stay
> at 9.9-1 and the lights would work most of the time. (Using a dummy load as
> well as an antenna)
>
> I checked the solder connections in the KAT100 and retouched a few. I
> noticed no change in behavior. I put the radio away for a few days and
> revisited the problem today .... 
>
> Before doing anything I did a SWR Bridge alignment on the KPA100 just to be
> sure nothing had changed. I adjusted for 0 voltage using a DMM as instructed
> in the manual.
>
> Currently, the tune sequence gives a 1.0-1 reading on the K2 meter but the
> scale lights on the KAT100 do not light up while tuning or when keying. The
> antenna and power lights are working properly.
>
> When keying 100 watts into a dummy load the power is reduced by various
> amounts depending on the band and the K2 shows HI Refl, the same symptoms
> using an antenna. 
>
> Using the menu for tuner readings, after hitting tune in the dummy load, I
> get:
>
> L00.4
> C0.08
> nET2
> t 197
> E243
> Init
> F1.05
> L0-L8 get relay clicks as well as 
> C0-C8 and
> N1-N2
>
> I am using the The KAT100/KPA100 in their own enclosure.
>
> Any help on where I should start from here to solve the problem?
>
> Thanks,
> Damon 
>
> (Don .. I sent you an email on this when the symptoms first started, maybe
> it was lost in SPAM)
>
>
> -----
> W4HDM-DAMON-K2#473 
>   
>