http://elecraft.85.s1.nabble.com/New-K3-built-can-I-reset-the-5w-calibration-tp7076112p7080280.html
> > From what I understand, the meter is rated at 5% of the
> **full scale** rating according to Bird. Full scale
> rating, is the rating on the slug.
>
> That would mean that for a meter with a 100W slug, your
> accuracy is +/- 5W (5%). So, if your wattmeter is reading
> 50W, the actual RF power could actually be 45 or 55 W....
>
> 73
> K1NR
>
>
> On Fri, 09 Dec 2011 09:08:55 -0500
> Mike<
[hidden email]> 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<
[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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