[Elecraft] New K3 built - can I reset the 5w calibration?

[Mike]

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<n0nb at n0nb.us>  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
>>