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

[Mike]

Meant to say:

If you get a reading of 50 watts the real power would fall in a range of less than 47.5
to 52.5 watts?


On 12/9/2011 9:08 AM, Mike wrote:
> 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
>>>
>
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