[Elecraft] K3S current draw relative to KAT3A settings

[Nicklas Johnson]

On Tue, 12 May 2020 at 12:34, Joe Subich, W4TV <lists at subich.com> wrote:

What do you see with: 1) a 50 Ohm load connected to the antenna port
> and the KAT3A bypassed,


See the "bypassed" column in the original chart.


> 2) a 50 Ohm load connected to the antenna
> port and the KAT3A removed (KANT3 board installed),


I purchased the K3S with the KAT3A installed, and as I don't have a KANT3
board handy to swap in, I am unable to tell you.


> 3) a 50 Ohm
> load connected to the antenna port and the KAT3A tuned for SWR =
> 1:1,


For 13W, on 40m, 6.71A; on 20m, 8.2A.  (The dummy load isn't a perfect 50
ohm match unfortunately; it's off by a few ohms and I measure 57 ohms with
a DC meter.)


> 4) your "antenna" connected to the antenna port and the KAT3A
> tuned for minimum SWR?
>

For 13W, on 40m 6.9A, on 20m 9.4A.  In both cases the ATU had no trouble
making a 1:1 match.

The actual measured SWR of the antenna system (ie, with an SWR meter) is
3.7:1 on 40m and 2.9:1 on 20m.  Not a great match obviously, but expected
for what it is.

   Nick

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