Re: Question about K2 mod for optimizing it for 5W CW

Posted by Alexey Kats on May 31, 2010; 1:40pm
URL: http://elecraft.85.s1.nabble.com/Question-about-K2-mod-for-optimizing-it-for-5W-CW-tp5121694p5121840.html

Thank you, Don, for responding so early (I hope you do not have
insomnia as I do). And yes, that's exactly what I am looking for - K2
restricted to 5W and to CW-only operation, so as long as it is safe
and is not going to introduce spurious emission it'll work for me.

On Mon, May 31, 2010 at 6:31 AM, Don Wilhelm <[hidden email]> wrote:

> Alexey,
>
> Make that change IF AND ONLY IF 1) you will never install the KSB2, AND 2)
> you will not operate above the 5 watt level.
>
> That change makes the K2 PA transistors more efficient at 5 watts and below,
> but the operation is non-linear and the efficiency is worse if the power is
> increased above the 5 watt level.
>
> So it is not a recommended change except for those special circumstances.
>  If the major use of the K2 is CW only operation at QRP levels on batteries,
> then it is worthy of consideration.
>
> 73,
> Don W3FPR
>
> Alexey Kats wrote:
>>
>> I have one more question about K2. I noticed that revision C of K2
>> manual says that if to increase QRP   T4 transfor
>>
>>
>

--
Alexey Kats (neko)
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