[Elecraft] K2: Problem With 80m?

[Michael J. Linden]

  I've recently noticed that my K2 produces much less noise on 80m than
on the other bands (40m - 10m) when I have no antenna connected (is this
typical?). And, when I listen to signals on 80m with the antenna
connected, the audio seems somewhat lower than what I get on the other
bands. My AGC is set at 3.8V and appears to be working properly (little
difference in background noise when AGC is switched in and out). 80m
tune-up went well and with a 13.8V supply I'm getting 17.5w on the low
end of 80m and 15.5w on the high end of 80m. The one caveat here is that
I'm using a 10/15/20/40m trap dipole to listen on 80m -- I need to
straighten-out my shack enough that I can compare the K2's 80m receive
sensitivity to that of my Kenwood 930S.
 
  Any input would be appreciated...
 
  Thanks, Michael N9BDF
  K2 #4137