[Elecraft] K3 - background hiss

[John Chappell G3XRJ]

While tweaking the rx EQ may help mask the problem I feel the root cause
is that the AGC operates at too low a signal level.
I like to set my RF gain at a level where I can hear what I want but
not the band noise. If I then engage the AGC it has the effect of 
increasing the gain by 2 or three S points increasing background band 
noise by the same amount.
Or put another way, the same as increasing the RF gain control
by 15 - 20 degrees of arc.

It is not receiver generated noise.

My receiver is fabulously quiet with the AGC off.

73 John G3XRJ


>
> My first thought was to change the EQ more like I have my TX eq set pulling
> the low end down and raising the high end up does tend to accent the
> high-end of speech for clarity on phone but on a quiet band makes the band
> noise sound hissy.
>
> I don't have my low end set up to the plus side as high nor the high end set
> as low on the negative side as N1EU but have went in this general direction
> to smooth out the band noise but in a very active round table I don't know
> if the noise tone is really that important in relation to good receive audio
> clarity. If you go too high on the plus side of the bottom end and too
> negative on the high end you can tend to use loose some signal clarity and
> get a little muddy.
>
>
>
> 73 de KE4WY Jim
>
> These work for me, CW or Phone:
>
>   RX Eq settings Low to High audio band:
>   50 =   +2
> 100=   +2
> 200=   +1
> 400=     0
> 800=    -1
> 1.6k=   -2
> 2.4k=   -3
> 3.2k=   -4
> ____________________________________________________________________________
>