[Elecraft] KX1 Power Measurements by band

[Phil Wheeler]

Ron D'Eau Claire wrote:

>Well, if it helps establish expectations of "adequate" at all, my S/N 004
>does the following with 13.8 vdc applied:
>
>40: 4.1 watts
>30: 4.8 watts
>20: 3.8 watts
>
>I believe that it's normal (the way the output network works) to see a
>"peak" in the 30 meter range.
>

Ron,

Here are the power levels I just measured with the 30 m module installed 
and a 13.8 V supply voltage (note: R30 is changed from 22 to 36 ohms and 
R4 is fully CW);

40: 4.5 W
30: 5.0 W
20: 3.4 W

So mine are in the same relationship as yours (30 highest, 20 lowest, 40 
in between) but I have a larger range (1.6 W vs 1.0 W from highest to 
lowest).

Measurements done with a precision digital qrp wattmeter into a very 
precise dummy load inside the meter.  ATU is not yet installed.

Aside from wishing 20 m were a tad higher (say 4.0 W), these results do 
not seem all that bad.  However, I will play with T1 a bit (check no of 
windings and respace ite prmary tomorrow (oops, later today) and see if 
I can reduce the power range.

73