[Elecraft] K2/100 output variation

[G3SJJ]

No, that didn't help, Stewart. With the 100 PA disconnected and 5 watts 
requested, I see around 0.5 w difference in actual power and that is stable.

Having re-connected the 100 w pa to restore the K2/100 to the state I 
would normally use it, I have put a scope on the output. With requested 
power of 50w, in Tune the readout shows 29w immediately, dropping to 24, 
21 and 17w, it then toggles between 17 and 22w. I can see this stepping 
on the waveform displayed  on my scope. It also explains what I was 
seeing the other night. Since I was working pile-up style, the overs 
would be short, so each time I went to transmit the power variation in 
the K2 would also vary drive to the amp with the consequent output 
variation of between 100 and 200 w from the amp.

Chris G3SJJ



Stewart Baker wrote:
> Chris,
> Take a look here... http://www.elecraft.com/Apps/Power_Control_Mod.html
>
> 73
> Stewart G3RXQ
>
> On Wed, 27 Dec 2006 14:07:24 +0000, G3SJJ wrote:
>   
>> I am sure I have seen a discussion about this one before. During an
>>
>> enjoyable 160m opening to the Right Coast just before Christmas I was
>> running a few Stateside stations and noticed a definite output power
>> variation coming from my Acom 1000 which was being driven by the K2. I
>> would guess that the drive power was varying between 30 and 50 watts.
>> Any thoughts on this?
>>
>> K2/100 5545 bought at Dayton this year, completed in September.
>>
>> Chris G3SJJ
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