[Elecraft] sensitvity k4

[Robin Szemeti]

Remember the noise/gain equation and how what determines sensitivity is
ultimately a systems noise figure.  ... when used with a transverter or an
EME preamp the  noise figure of the system will essentially be set by the
noise figure of the first stage.  Subsequent stages have much less effect
on the noise figure, as the noise contribution is divided by the gain of
the preceding stage.

On Tue, 13 Oct 2020 at 21:47, Richard Donner <richarddnnr2 at gmail.com> wrote:

> Wayne,
> Thank you.
>   My main issue here is weak signals.    There are no
> ham stations near me to cause interference.
>
> A good antenna is what I ought to have but that is not happening.
> Richard
> Richard Donner
>
> On Tue, Oct 13, 2020 at 12:56 PM Wayne Burdick <n6kr at elecraft.com> wrote:
>
> > Hi Richard,
> >
> > All K4 models utilize the same front-end circuitry (preamps, filters,
> > etc.), so all will have virtually identical sensitivity for a given gain
> > setting. These in turn will be similar to the K3/K3S.
> >
> > 73,
> > Wayne
> > N6KR
> >
> > > On Oct 12, 2020, at 4:52 PM, Richard Donner <richarddnnr2 at gmail.com>
> > wrote:
> > >
> > > Anyone have an idea which version of the k4 would have the most
> > sensitivity
> > > for weak signals?
> > > Thanks  Richard
> >
> >
> >
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