[Elecraft] DSP and IF Filters

[Ron Edmon]

I have been going through the manual on the K3 trying different combination
of DSP and IF as well as NR filters trying to reduce atmospheric noise.  I
find the noise level to high pitched which fatigues me after an hour or so
of listening.  I've listened to the "Hear It" external DSP filter employed
on a friends ten-tec rig and the reduction of atmospheric noise is
significant (1 "S" unit or better).  Shouldn't the K3 DSP filter be capable
of reducing the atmospheric noise to acceptable levels?

Ron, N6SC