[Elecraft] KX1 Issue

[Alexandra Carter]

If it won't tune to a dummy load then something is really wrong. 73  
de Alex NS.Y.

On Jun 20, 2006, at 6:24 AM, Brian Murrey wrote:

> Any experts on KXAT1 debugging?
>
> Yesterday I had the KX1 in the car with the 20m hamstick and for  
> about half
> the
> day I was about to work Florida, Mass, Texas...with 2w and the  
> KX1.  I was
> using the KXAT1 to tune my hamstick, even though I have the  
> hamstick adjusted
> to 1.2 : 1 without the tuner.
>
> BIG storm comes along, I'm not running CW now, I'm driving and  
> listening to CW
> and lots of static.  So I shut off the rig and keep tooling on down  
> the road.
>
> About 20 mins later I pull into Riley Park in Greenfield IN and and  
> park so I
> can play radio...except the KXAT1 is saying I am only putting out . 
> 05 watts,
> then sometimes maybe .09 watts...SWR is like 8:1 now.  So I move  
> the car...I
> am in the clear...nothing metal near me...same thing.  huh.
>
> When I get home I take the rig in to the radio room and attach it  
> to the attic
> dipole, that never fails.
>
> I put it in auto tune mode...on 40m...SWR reads 9:1 on the KX1 but  
> 1.2:1 on my
> external meter. I take it out of auto tune...do a manual  
> tune...KXAT! says SWR
> is 9.9:1 and power out is less than half a watt...on a 14.0v power  
> supply.
>
> So I go through the ATU setting, no error code (showing E00).  I  
> yank the
> KXAT1, jumper pins 1 and 3 on J7...which now makes it a KX1 without an
> internal ATU.
>
> I connect it to my external antenna tuner/SWR meter and tune for  
> 1:1 SWR and
> I'm getting almost 3w on 40m, 4w on 30m, and 2.8w on 20m....like
> normal...according to the external meter.  Made a couple of QSO's  
> and got 579
> and
> 599...meter showing just about 3w as expected.
>
> So what happened to my KXAT1?   Did the firmware take a dive?
>
> I also notice that when I transmit now, I only get one LED at the  
> far left of
> the display to pop on...it used to show three or four...external  
> meter shows
> 3w usually.  I did reset to factory defaults, turned the 30m back  
> on...maybe I
> don't know what the SIG settings should be...
>
> Anyone have any ideas? I have tuned C9 on the KXAT1 for the lowest  
> DC voltage
> at the REFL point...I'm getting .62 vDC. I have stepped through the  
> relays and
> they all click when activated, so I'm kind of stumped other than  
> thinking the
> firmware got hosered up somehow in the storm. It will not tune to a  
> dummy
> load...or at least the LED display says it won't.
>
>
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