[Elecraft] K3: PRE/ATT Bug or feature?

[ab2tc]

Oof. Having the attenuator and preamp on at the same time is completely
nonsensical. The gain of the preamp is ~11 dB and the loss of the attenuator
is ~10dB so they almost completely cancel each other out gainwise. But *all*
the noise from the preamp will be added, so your noise floor will be
significantly raised and there is *no* advantage gained. The total dynamic
range will be reduced by at least the increase in the noise floor (that's
assuming that the preamp is completely distortion free).

AB2TC - Knut


The Smiths wrote:
> 
> 
> I find it to be much better in some circumstances.  I find that the noise
> floor is actually reduced, not brought up by the 2dB that would be
> expected.  This is very similar to when I adjust the RF Gain down to about
> 3 o'clock.  Yet it works much faster because I can simply push the button
> on and off when I need it.
>  
> <snip>
> 

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