[Elecraft] KX1 ATU - Alignment & Test

[Don Wilhelm]

Burke,

Yes, do set C9 for the null as indicated in the manual.  It makes a BIG 
difference in both the forward and reverse (SWR) power readings.  If the 
KXAT1 does not show decent power out - in ATU CAL mode into a 50 ohm 
dummy load, then remove the KXAT1 and install the jumper at J7, then 
using a known accurate external wattmeter, tell us what the power output 
on the base KX1 is for each band - ideally, power the KX1 from a 13.8 
volt power supply - the reference data I have is based on that power 
supply voltage, and lower voltages will result in lower power outputs.

73,
Don W3FPR

Burke Jones wrote:
> I know this is an old thread, but I thought I would revisit it.
>
> After a couple of months of "life" I was finally able to get back down to
> the bench.  I picked up the ATU and immediately noticed a big white
> rectangle with no part.  I had forgotten to install R5!
>
> I don't know how many times I had looked at that board and not noticed it,
> but last night it jumped right out and got me.
>
> Now the display is showing power out, but not what it should be.  It is
> under a watt output on 40 and 20.
>
> I will spend some more time tonight looking it over and be sure I have C9
> properly set.
>
> Anyway, I thought you would appreciate the update!
>
> Burke
> http://N0HYD.com <http://n0hyd.com/>
>   
>