[Elecraft] K2 - KPA100 to much output on 80/40 m in SSB with Comp on

[Dr. Werner Furlan]

hello to the group, 

since the beginning of my tests with the KPA100  I am observing a strange 
problem. 
On 80 and 40m I must not use a Comp setting > 1 (which is off) otherwise 
the output jumps to 150W (measured with the LP100 meter) 
In CW mode and when I turn Comp off everything is in the normal range.

When I turn the RF power below 10 Watts everything looks fine. 
Today I visited my friend OE9FSI and we found out, that he has exactly the 
same problem but he never noticed it because he rarely works on SSB and 
always had Comp off.

We both have made the SSB modifications to increase mic gain and comp 
as described here.
http://www.qrpproject.de/Media/pdf/ZusammenfassungMods.pdf

I have read on the list a note from Don Wilhelm about a problem that seems 
related to me which has to do with a  R98 value not being adequate for my 
K2, but I am not sure if this is the right trace to solve the problem. 

Your help would be very appreciated.

73! de Werner OE9FWV



 
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