[K2] [Elecraft] Excessive PSK IMD with new K2/100

[dberkley]

Don,

At first I thought your suggestion didn't affect anything since I already
had dressed the leads fairly well.  However, in bypass mode (less than 10
watts) the IMD is now back to -30 dB.  Also, after running for about 15
seconds, the IMD at 25 watts now drops to about -27 dB.

So there is now a noticeable difference between bypass and KPA100 mode and,
I suspect, a difference in my SSB performance as well.  Any other good
thoughts like that one?

Tnx and 73,  David
K2MUN


Don Wilhelm-4 wrote:
> 
> David,
> 
> The KPA100 can be coupling back into the KSB2 option.
> Remove the right side panel and tuck the ribbon cable and speaker cable 
> up into the space at the top of the KPA100 instead of letting it dangle 
> near the KSB2 board.
> 
> I will not guarantee that it will help, but it often makes a difference 
> on SSB, and can also help on data modes.
> 
> 73,
> Don W3FPR
> 
> dberkley wrote:
>> Just built a KPA100 for my K2 S/N 6274.  When originally running PSK on
>> the
>> barefoot K2 had no problem achieving IMD around -30 dB (measured with
>> PSKmeter).  The K2 had a KAT2 tuner which was removed, and replaced by an
>> external autotuner when the KPA100 was installed.
>>
>> With the new KPA100 in place I can't get the IMD below about -24 dB and
>> it
> ...
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