[Elecraft] K3 on 40 meters

[Gene]

I have noticed that signals on 40 meters do not appear very strong on my 
K3.  The audio and signal strength is very low. Other hams in the area 
hear signals S9 +5 while these only register S1 at best on the K3. 
Antenna type and height are almost identical as I have.

Attenuator is not on and noise reduction has minimal effect. Turning up 
the RF gain does not help. Signals on other bands seem to be normal.  
Has anyone experienced this?

Gene,
W2BXR