Low power on 20M band once ATU is installed

[Elecraft mailing list]

I just built a new K1 and had some problems with the output power. To make  
a long story short I
ended up having to lower the values of R5 and R11...  This brought the  
power levels up on
the 40 M band from 1.5 to 6.5 Watts and on the 20 M band from 0.5 to 5.5  
Watts. Figured all was well now until I installed the new ATU....
 
For some reason my output power on the 20M band into a 50 Ohm dummy load is
 only around 0.7 Watts now with the ATU installed.  If I remove it - it
goes  back up to normal!
 
Any ideas?
 
Thanks,
 
Michael
n2zdb
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