[Elecraft] K2 noise

[richard gilley]

With so much talk on the K3 noise, AGC etc I thought I would ask if  
the following is normal on a K2.  Or do I have an issue with my build  
6732.
This K2 has the KSUB SSB and KPA100 additions.
With only battery power and ear phone connected; AGC off: AF fully  
clockwise; RF gain fully ccw; cw mode; fltr settings 200,400, or 700.  
any band,  I hear a definite constant, fairly low level, hash.

With RF gail fully clockwise and AF gain fully ccw, no hash is heard  
until AF gain is advanced from 7 o'clock to about 8 o'clock.

Would this be considered normal or do I have another issue to look into?

Best regards
Dick AD1G