[Elecraft] Odd problem on 160m

[WN3R, Dick]

I put up a new 160m dipole and SSB signals sound like something is pumping
with AGC in the slow mode.  SSB Stations sound much better with fast AGC.  I
have a Dunstar 600 but since I am using the aux ant jack it's not in the
receive circuit.

Perhaps I should reconfigure to add the Dunstar.  BTW, when listening on the
K9AY loop, signals sounds much better (no pumping).

Any ideas?

73, Dick, WN3R