[Elecraft] Problems with Power Output

[Brian Alsop]

You may be right.  I do lots of S&P which more often than not includes a 
band change.  Perhaps it is the band change effect I'm seeing.

73 de Brian/K3KO

On 6/2/2012 15:48, N5GE wrote:
>
> My experience is that once the power has been managed as Don say's, there is no
> more ramp-up.  I use only CW and after the ramp-up the first dit is at full
> output.
>
> I'm using the KPA500 here.
>
> Amateur Radio Operator N5GE
> ARRL Lifetime Member
> QCWA Lifetime Member
>
> On Sat, 02 Jun 2012 15:21:31 +0000, Brian Alsop<alsopb at nc.rr.com>  wrote:
>
>> Guys,
>>
>> I may be imagining things, but this effect seems to always be there with
>> my K3.  My perception is that it is not just limited after band changes
>> or power level changes.  It is especially evident when running a big amp
>> that has a fast display of output power.
>>
>> Where it may matter is in contesting.  You want them to copy the first
>> letter of your call right the first time.  You want the first dit/dah to
>> be loud.
>>
>> Yes, my K3 has been through the RF power calibration.
>>
>> I'm going to have to look closer at this.
>>
>> 73 de Brian/K3KO
>>
>>
>>
>> On 6/2/2012 15:08, Don Wilhelm wrote:
>>> What Roy says is true.  The K2 and K3 use a closed control loop to
>>> adjust power output.  It starts out at low power after a power on or a
>>> band change or a change in the power requested - the actual output power
>>> is measured and compared to the power requested, and the drive is
>>> adjusted until the two match.
>>> It does not take long to come up to the requested power level, but it
>>> will not be with the first dit on CW nor the first few syllables on SSB.
>>>
>>> 73,
>>> Don W3FPR
>>>
>>> On 6/2/2012 11:01 AM, Roy Morris wrote:
>>>> I do not believe there is anything wrong with either K2s or K3s that do not
>>>> put out a full 100 watts on the first SSB syllable.  I have built two K2s
>>>> and two K3s, and the ALC action is very similar on all of them.  Save your
>>>> time trying to do another transmit calibration.  I don't think it will solve
>>>> anything.  If it ain't broke, don't fix it!  Roy  W4WFB
>>>>
>>
>>
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Checked by AVG - www.avg.com
Version: 2012.0.2178 / Virus Database: 2425/5039 - Release Date: 06/01/12