[Elecraft] K3: very quiet on CW

[Bill]

I have not used my K3 for CW, so I have no experience with it. So, a 
couple of days ago I decided to give it a try, after all - winter is 
coming.

When I switched to CW mode - things got deathly quiet. Quiet as in all 
the background noise vanished - along with most of the signals. I could 
see them unchanged on the P3 - but, had to turn up the audio gain to 
hear them. With the audio gain up, I could hear everything that my other 
rigs were hearing - except no background noise. Compared to my past 
experience - this is not normal.

I am using a K3 set up for SSB and only having the 2.7. 2.1, and 6 kc 
filters. Some ACG changes have been made to afford improved arm chair 
copy on 75 and 40 meters.

My question: Have I been missing out on using the quietest CW rig ever 
made or is there something wrong with my receiver? It just seems too quiet.

Thanks,

Bill W2BLC K-Line