[Elecraft] KX1 ATU low power indication

[Frank R. Oppedijk]

Hi all,

Does anyone have any idea about the possible cause of the low power 
reading by the KX1 ATU?

Thanks,

Frank

>Hi,
>
>After having been off the air for about a year (moving house; other
>interests) I have recently fired up my KX1 again. When tuning up a
>random length of wire, I noticed that the output power indicated by the
>KX1 ATU was only 0.4 to 0.5 Watts (while SWR was good: 1:1.0 to 1:1.1).
>I attached a 50 ohm dummy load and hooked up my oscilloscope and saw a
>nice 24V peak-to-peak voltage on key down. That's 1.4 Watts and IIRC not
>bad for a battery-powered KX1 (battery voltage indicated by the KX1:
>8.5V on receive, 8.4V on transmit).
>
>Why then the low power indication by the ATU?
>
>I have already taken the unit apart and have resoldered all solder
>joints on the ATU PCB, but to no avail. Does anyone have any ideas?
>
>Thanks in advance,
>
>73 de PA4N