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Re: New K3 built - can I reset the 5w calibration?

Posted by Eugene Balinski on Dec 09, 2011; 4:59am
URL: http://elecraft.85.s1.nabble.com/New-K3-built-can-I-reset-the-5w-calibration-tp7076112p7077062.html

The accuracy of Bird elements is typically  +/- 5% of the
full scale value.  For a 100 W Slug, that is +/- 5 Watts.
  So theoretically speaking, with 5W in, and 0 registered
on the meter, the meter is still within its rated accuracy.


Additionally on the model 43 meter, there is meter scale
end compression.  To get the most accurate reading, one
would want to have the 5W reading at the middle of the
meter range, which means that one would want a 10W slug.
 Unfortunately I do not believe that Bird makes a 10W  HF
slug any more.  Perhaps they need an Elecraft W2 ??  

73
K1NR


On Thu, 8 Dec 2011 16:47:27 -0600
 Nate Bargmann <[hidden email]> wrote:

> >From my experience, trying to measure 5W with a 100W
> element leads to
> very inaccurate readings.  The Bird is most accurate when
> the reading is
> as near to full scale as possible.  That means a 5W HF
> element (is that
> even available?) would be ideal provided no more than 5W
> is put through
> the meter.  A 10W element would be less accurate but
> provide a safety
> margin for the meter.  Even better would be to have both
> elements and
> use the 10W one to get in the ballpark and the 5W one for
> a final check.
>
> 73, de Nate N0NB >>
>
> --
>
> "The optimist proclaims that we live in the best of all
> possible worlds.  The pessimist fears this is true."
>
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>
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