http://elecraft.85.s1.nabble.com/New-K3-built-can-I-reset-the-5w-calibration-tp7076112p7078597.html
**full scale** rating according to Bird. Full scale
rating, is the rating on the slug.
accuracy is +/- 5W (5%). So, if your wattmeter is reading
> Wait.
>
> Using a 100W slug, if you get a reading of 100 watts, the
> real power would be between
> 95 and 105 watts, right?
> If you get a reading of 50 watts the real power would
> fall in a range of less than 45
> to 55 watts?
>
> Not if the 5% at full scale is the best accuracy. Or did
> I misunderstand what you said?
>
> 73, Mike NF4L
>
>
> On 12/8/2011 11:59 PM, Eugene Balinski wrote:
> > 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."
> >>
> >> Ham radio, Linux, bikes, and more:
http://www.n0nb.us> >>
>
>
>
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