[Elecraft] K1 output power msmt accuracy

[Phil Wheeler]

Mark,

I have four wattmeters (one a WM-2) I can use in the sub-5W range.  NONE 
of them agree to within 0.1 W anywhere in the 1-5 W range.  5% of 
full-scale is a very good spec for a wattmeter (most are speced at 10% 
of FS).  Assuming a 5 Watt scale and 5% accuracy, you get a possible 
error of 0.25 Watts -- and that is for a pretty good meter.

I think expecting the WM-2 to agree with the K1 meter to within anything 
like 0.1 W is too optimistic.

73, Phil

MFoster wrote:

>I just completed building an OHR WM-2 wattmeter.  My
>signal generator at work doesn't have enough output to
>test this meter, so I'm taking Marshall's alignment
>process as my gospel. 
>
>Putting my K1 on this meter shows that output is
>higher on the WM-2 (by up to a watt... typically
>around 0.5w) than indicated by the K1's LCD wattmeter.
> 
>
>Is this typical indication accuracy for a K1? 
>
>Yes, I can build a table to correlate indicated vs
>measured output, but I'd like for the K1 itself to be
>within 0.1W accurate.  
>