[Elecraft] a question to Wayne Burdick - K3S if gain

[IK4EWX]

I need an info, and this time I thought "why not ask to the Elecraft nr.1 top
tech?"
If it is possible.
On my Elecraft K3S, sn 10715, the if gain, or better the FLx GN, was setted
0 for FL1 (2700hz-5 pole),
4 for FL2 (500hz-5 pole) and 8 for FL3 (200hz-5 pole).
I read somewhere that it would be better 0 for wide filter, 2dB for medium
filter, 4 dB for narrow filter.
What is better Wayne? Can I use on my great K3S 0dB-2dB-4dB? Or you prefer
other settings?
C op 99% of time...


Second and least question for Wayne. 
Sometime I like to use my old Cubic Astro 102BXA, yesterday on 10 meters,
with a bug. 
How can be that this rig, 35 years old, have the best agc and a great qsk
even for today standards?
Lot better than every ja rigs, but even more pleasant to listen than today
greatest rigs in the world (Elecraft obviously....)
Can it be that audio derived agc (I think it have this kind of agc) is the
best even today?




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