[Elecraft] [K3] Power variations in K3 / 3.19

[Wayne Burdick]

I'll be reviewing power-settling behavior  when I get a chance. Thanks  
for the report.

73,
Wayne, N6KR

Sent from my iPhone

On Jul 18, 2009, at 8:38 AM, Björn Mohr <bm at broadcast.se> wrote:

> On 9 jul 2009, at 16.02, Ignacy wrote:
>
>> There is an old problem still present on 3.19. AFter turning the  
>> rig on, in
>> SSB the peak power starts at 30-70W and in a minute of transmitting  
>> rises to
>> about 95W (when set to 110W). Measurements with LP-100 calibrated in
>> factory.  The initial power varies from time to time.
>>
>> Any ideas?
>
> This problem has been around for some time with my K3. What happens  
> for me is that when I set the power to specific level and push TUNE  
> the radio stabilizes at that preset level. Then when keying and  
> begin talking the power level is a lot lower that verified with  
> TUNE. After a few seconds the power peaks are in the vicinity of the  
> preset level, but sometimes peaks are reaching above the preset  
> level which makes me reluctant to mess with TXG VCE. Another  
> observation is that this problem is only with the PA in line, taking  
> power below 12 watts seems to eliminate the issue.
>
> Earlier the problem was reversed as power overshot the set level in  
> SSB, now I am less worried but seeing the issue solved would provide  
> some comfort when using the amp.
>
> I am also using a factory calibrated LP-100A to verify my  
> measurements.
>
>
> 73 de Björn,
> SM0MDG
> SE0X